and the water and cement ratio is not exceeded. a) 30 minutes c) 45 minutes b) 15 minutes d) 60 minutes 1. Scales for weighing aggregates and cement shall be accurate within ____ % throughout the range of use. Scales shall be inspected and sealed as often as the Engineer may deem necessary to assure their continued 7. A sample from a bituminous mix weighs 1000 grams. At accuracy. extraction, it was found out that the dry aggregate weighed 950 a) 1.0 % c) 0.5 % grams. What is the % of asphalt by weight of mix? b) 1.5 % d) 2.0 % a) 5.2 % c) 5.4 % b) 5.0 % d) 4.8% 2. When cement is placed in contact with the aggregate, batches may be rejected unless mixed within _____ hours of such contact. 8. The minimum penetration of the preservative with the surface of a) 1.5 hours c) 0.5 hours the timber piles shall be ____ b) 2.0 hours d) 2.5 hours a) 150 mm c) 250 mm b) 200 mm d) 100 mm 3. When mixed at the site or in a central mixing plant, the mixing time shall not be less than ______ nor more than ____ unless mixer performance test 9. The contractor shall submit in writing a job-mix formula for the prove adequate mixing of concrete in a shorter time period. mixture supported by laboratory test data along with samples of a) 30 seconds nor more than 90 seconds resources of components and viscosity – temperature relationships to b) 50 seconds nor more than 90 seconds the Engineer for testing and approval at least ____. c) 60 seconds nor more than 120 seconds a) two weeks c) one week d) 90 seconds nor more than 120 seconds b) three weeks d) four weeks
Materials Engineer Test Reviewer
4. The flow of water shall be uniform and all water should be in the drum 10.by The concrete samples should be stored in a moist conditioned the end of the first ____ seconds of the mixing period. a) 45 seconds c) 15 seconds b) 30 seconds d) 20 seconds
temperature within the range of ____ until the time of test. a) 18* C to 24* C c) 14* C to 24* C b) 15* C to 18* C d) 18* C to 28* C
5. Concrete not place within ____ minutes from the time the ingredients11. This is used in soil stabilized road surface due to its high ____ were charged into the mixing drum shall be used. a) 120 minutes c) 60 minutes b) 150 minutes d) 90 minutes
property, that is, it absorb and retain water. a) Potassium Chloride c) Magnesium Chloride b) Calcium Chloride d) Sodium Chloride
6. When concrete is delivered in truck mixers, additional water may be12. The mass % wear of soil aggregate used in cement/lime added to the batch and additional mixing performed to increase the slump proportions should not be more than ____ . to meet the specified requirement if permitted by the Engineer, provided all these operation are performed within ____ after the initial mixing operation
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a) 40 % b) 50 %
c) 45 % d) 55 %
a) 1.151 to 1.174 b) 1.250 to 1.178
c) 1.051 to 1.154 d) 1.058 to 1.184
13. The uniform rate at which the movable head of the CBR machine travel 20. The specific gravity magnesium sulfate solution used in is _____ . / min b) 0.10 in /min
c) 0.08 in /min d) 0.09 in /min
a) 0.05 soundness in test for aggregate should be within the range of ____ . a) 1.280 to 1.408 c) 1.295 to 1.308 b) 1.180 to 1.308 d) 1.195 to 1.318
14. Cast in place concrete shall not be post – tensioned until at least ____21. Aggregate accounts for 92 – 95 % of the weight of the bituminous and until the compressive strength has reached the strength specified. mixture asphalt accounts for 5 – 8 % of the weight of the mix. The a) 7 days c) 14 days exact percentage to be used is determined by the _____ b) 10 days d) 20 days a) Trial mix c) Job mix b) Design mix d) Job order 15. The penetration test is an indication of the ____ of asphalt. 22. _____ is an indication that the asphalt mix is overheated. a) Consistency c) Hardness b) Softness d) Flash Point a) Blue smoke c) Rising steam b) Stiff appearance d) Mix slumps in truck 16.Specification requires one (1) Quality test for every ____ of asphalt a) 20 tons 23.In checking the temperature of the mix, the thermometer c) 50 tons should be inserted into the mix at least ____. b) 200 tons d) 40 tons a) 2 inches c) 4 inches b) 6 inches d) 6.0 mm 17. The ____ is the most commonly used method in the design and 24. _____ is applied on existing bit, or cement concrete surface with evaluation of bituminous concrete mixes. a) Job mix formula c) Marshall Stability bituminous materials. b) Design mix d) Extraction a) Bituminous Prime Coat c) Bituminous Seal Coat b) Bituminous Tack Coat d) Bituminous Surface Treatment 18. Vibration shall operate a frequency of 8,300 to 9,600 impulses per 25. The solution used in the soundness test of aggregate shall be minute under load at a maximum spacing of ____ cm. a) 30 cm c) 60 cm cooled to a temperature of 21 +or – 1* C and maintain at that b) 50 cm d) 40 cm temperature for at least _____. a) 24 hours c) 48 hours b) 36 hours d) 18 hours 19. The specific gravity of Sodium Sulfate used in soundness test for aggregate should be with in the range of ____.
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26. Proper compaction of the fill materials is very important, as it will ______. 33. Before the cement is to be used, sampling must be done at least a) Increase the shear strength b) Decrease permeability c) Minimize compressibility d) All of the above
_____ before use. a) one week b) 14 days
34. Asphalt cement shall not be used while it is foaming nor shall be
27. In which DPWH item is emulsified asphalt not suitable? a) Item 301 b) Item302
c) two weeks d) 12 days
heated at ____ at anytime after delivery. a) 107* c) 120* b) 159*
c) Item 304 d) Item 308
28.Unconfined compressive strength test is usually performed on 35. Moisture content of aggregate in bit mix shall not exceed ____ of ______. a) Sandy soils c) the time it is introduce into the mixing unit. Organic soils a) 1.5 mass % c) 1 mass % b) Silty soils d) Clayey soils b) 2.0 mass % 29.Consolidation test is usually performed on ____ samples a) Disturbed c) Consolidated b) Undisturbed d) both a & b
36. Batching tolerance for Sand and Aggregate is ____. a) 1 % b) 2 %
c) 3 %
30.A concrete core sample having a maximum height of less than 37. Between stage of curing, concrete shall not be exposed for more _____ of its diameter before capping or height less than its diameter than how many hours? a) 24 hours c) after capping shall not be tested. ½ hour b) a) 93 % c) 95 % 3 hours d) 72 hours b) 94 % d) 96 %
38. As a Materials Engineer, what will you do with major
31. The cohesion and internal friction of soil is tested by
honeycombed area that is considered as defective work? a) Plaster b) Payment of the concrete will be made an adjustment c) Removed and replaced at the expensed of the contractor 32. In concrete acceptance, core will be considered adequate if the average strength of the cores is equal to what? 39. If the strength of control specimen does not meet the a) 80% of specified strength & if no single core is less than 75% of specified requirement and not feasible to obtain cores due to structural strength b) 90% of specified strength & if no single core is less consideration, as a Materials Engineer what will be your decision? than 80% of specified strength c) 85% of specified strength a) Removed and replaced & if no single core is less than 75% of specified strength a) Tri axial shear test b) Direct shear test
c) Bearing test d) All of the above
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b) Area will not be paid c) Payment will be made at an adjusted price
47. Minimum size of galvanized wire mesh is ____________.
a) 2.0 mm c) 2.7 mm b) 2.2 mm d) 3.4 mm 40. After concrete has been placed, it is advisable to maintain fully welted and in position for how many hours? 48. Minimum density of gabions is ___________. a) 14 hours c) 72 hours a) 1,000 kg/cu. m c) 1,400 kg/cu. m b) 24 hours d) 15 – 18 hours b) 1,200 kg/cu. m d) 1,500 kg/cu. m
41. Rock shall be excavated to a depth ____ below sub grade within the 49. limitSoundness loss of field gabions is __________________. of the roadbed mm b) 150 mm
a)a)100 9 % after 5 cycles b) 10 % after 5 cycles
c) 200 mm
50. The heating temperature of reflector zed thermoplastic material during application is _____ a) 130 +/- 7* C c) 200 +/- 7* C b) 150 +/- 7* C d) 211 +/- 7* C
42. Minimum penetration of all piles shall be ____. a) 3 meter b) 6 meter
c) 11 % after 5 cycles d) 12 % after 5 cycles
c) 7 meter d) 4.5 meter
43. Piles shall not be driven within 7 meters of concrete less than _____ 51. old.Submission of sample minimum quantity of material for asphalt a) 7 days b) 14 day
cement is -------. a) 5 kg b) 10 kg
c) 28 days
44. Paint contains _____ of pigment and _____ vehicle. a) 20 % & 80 % b) 21 % & 79 %
c) 79 % & 21 % d) 80 % & 20 %
45. Minimum thickness of bedding materials beneath the pipe is _____. a) 100 mm b) 150 mm
c) 200 mm
52. For how many years does the small Contractor given to procure necessary testing equipment? a) 2 years c) 5 years b) 4 years d) 6 years
53. The depth of the weakened joints must not be less than ____ and a width of ___. a) 40 mm & 6 mm b) 50 mm & 5 mm
46. Tolerance of gabion dimension is _________________. a) +/- 1% b) +/- 2 %
c) 20 kg d) 100 kg
c) +/- 3 % d) +/- 4 %
c) 40 mm & 5 mm d) 50 mm & 6 mm
54. Used of bituminous cold mix for potholes patching during rainy/ wet period is acceptable a) false b) true
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55. In soil, all boring shall be carried to a depth of at least ____ below thepsi/sec
a)psi/sec 0.50
proposed grade line. m c) 1.5 m b) 1.0 m d) 1.8 m
b) 20 - 50 d) 15 – 40 psi/sec
63. I n a soil exploration, if the characteristic of rock is questionable, 56. The test that determine pile bearing capacity by loading one or more pile and measuring settlement under load is _____. the minimum depth of boring into the bedrock should be _______. a) Vane shear test c) Pile load test a) 1.5 m c) 2.5 m b) Plate bearing test b) 2.0 m d) 3.0 m 57. The weight of disturbed samples from hard auger or split spoon shall64. beDetermine soil bearing capacity by loading a steel plate usually at least ____. a) 1 kg 30” diameter. c) 10 kg b)Vane shear test a) c) Pile load test 20 kg d) 100 kg b) Plate bearing test d) None of the above 58. Submission of sample for testing for cement is _____. a) 10 kg c) 15 kg b) 20 kg d) 40 kg
65. How many hours do aggregate stockpile or binned for draining before being batch? a) 1 hour b) 6 hours
59. The length of Shelby Tube of an undisturbed sample is _____. a) 10” long b) 18” long
c) 20” long
c) 12 hours d) 24 hours
66. What is the relative strength of mortar at 7 & 28 days of fine aggregates, when tested for the effect of organic impurities, which is higher than the standard? 60. For small project where quantity of steel bars is 10,000 kg or less, what a) not less than 90 % c) not less than 95 % is the basis for acceptance of material? b) not less than 80 % d) not less than 98 % a) No testing c) Mill certificate b) P.E, certificate 67. What is the rate of loading for concrete beam tested for flexural stress? a) 110 – 150 psi/sec c) 61. ______ determine the best combination of the material that will produce 125 a– 175 psi/sec potentially stable & durable mixture. b) 115 – 150 psi/sec d) 130 - 175 psi/sec a) Job mix formula c) Design of bituminous mix b) Marshall formula 68. In concrete sampling paste shall be of normal consistency of _____ when the rod settles to a point below the original surface in 30 secs. 62. _______ is the rate of loading for concrete cylinder sample subject to a) 10 +/- 1 mm c) 15 +/- 1mm compression test a) 20 - 40 psi/sec c) 15 – b) 4011 +/- 1 mm d) 20 +/- 1 mm
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77. Prime coat shall be left undisturbed for at least _____. a) 6 hours c) 24 hours b) 12 hours
69. What the temperature of a concrete sample? a) 10 – 15 * C b) 18 – 24 * C
c) 15 – 18* C
78. The first phase of rolling the spread bituminous mix is called breakdown rolling which is carried out by pneumatic roller, a) 1 % c) 3 % temperature requirement must be _____. b) 2 % d) 4 % a) 200 – 225* F c) 160 – 180* F b) 190 – 199* F d)150 – 185* F 71. Retarder can delay the setting time of concrete up to how many hours? a) 1 hour c) 4 hours 79. How many gradation ranges for hot plant mix bituminous b) 2 hours d) 8 hours pavement are there in the blue book? a) 5 c) 7 72. Super plasticizer can increase the strength of concrete up to how many b) 6 d) 8 percent? a) 40 –
70. What is the wash loss of fine aggregates in the no. 200 sieve?
60 % b) 50 – 60 %
c) 50 – 70 % d) 60 – 70 %
80. What is the plasticity index of mineral filler? a) not greater than 4 b) not greater than 6
73. ___________ is the moisture in an air – dried soil a) Moisture Content b) Natural Moisture Content c) Hygroscopic Moisture Content d) Hydrometer Moisture Content
c) not greater than 8 d) zero
81. If no core had been taken at the end of each day of operation and the project has already been completed, a core shall be taken ________. for every 75 l.m,/lane c) for every 100 l.m/lane b) for every 150 l.m/lane d) for every 1,000 l.m/lane
74. _________ is the tolerance of mix in bituminous. a) 10* C c) 15* C b) 12* C d) 18* C
a)
82. ________ is the slump of workable concrete if vibrated.
a) 10 – 20 mm 75. _________ Number of measurement taken in a core sample for thickness b) 10 – 40 mm determination of the finish asphalt pavement a) 3 c) 5 83. ________ Burnt product b) 4 d) 8 to form Portland Cement. a) Hydraulic cement 76. In the absence of beam mold in site, cylinder mold is allowed by b) Clinker specification. What is the required strength? a) 2,500 psi c) b) 3,000 psi d) 4,000 psi
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c) 40 – 50 mm d) 40 – 75 mm which is used by Gypsum and pulverized c) Fly Ash d) Volcanic Ash
84. When group index = 0, what is the grade of soil? a) weak soil c) good soil b) poor soil
92. _______ is an empirical number used in evaluation for G.I. a) 0 – 15 b) 5 – 20
c) 0 – 20 d) 0 – 25
85. ______ is a process of breaking down of rocks into small pieces of various 93. It indicates good subbase materials when G.I. is equal to _____. size that can range from large boulders to very small clay particles. a) 0 c) 10 a) Consolidation c) Weathering b) 5 d) 20 b) Unconsolidation
94. It indicates very poor subbase materials when G.I. is equal to 86. ________ is the limit were further loss of water due to evaporation which _____. a) 0 will not result in reduction of volume. c) 10 a) Plastic limit c) Shrinkage limit b) 5 d) 20 b) Liquid limit 87. ________ a classification of soil which 35% or less the particles pass 95. ______ indicates the composition of soil. a) Atterberg Limit b) Plasticity Index through no. 200 sieve. a) Grain size soil c) Silty clay materials b) Granular 96. The higher the value of PI of the soil, the weaker will be the soil materials d) Clayey materials performance as a _____. a) True c) Depend 88. ________ a classification of soil which 35% or more of the particles pass b) False d) None of the above through no. 200 sieve a) Course Sand Soil c) Silty-Clay Materials b) Granular Materials d) Clayey Materials 97. _______ the Plasticity Index of group of soil a) 0 c) 10 89. It evaluate the quality of soil as highway subgrade material. b) 6 d) 11 a) Atterberg Limit c) Group Index b) Plasticity Index d) Liquid Limit 98. _______ is the minimum percent of A-6 group classification of soil. 90. When soil has plasticity index value of 10, what is the criteria of the a) 0 % c) 35 % material? a) b) 25 % d) 36 % Coarse grain c) Clayey b) Sandy d) Silty 99. _______ is the maximum of G.I. of Silty Clay Materials a) 0 c) 20 91. When plasticity index is equal b) 25 d) 35 a) Coarse grain c) Clayey b) Sandy d) Silty 100. When the value of G.I. is negative, what will be the soil performance? a) Poor Subgrade
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c) Good subgrade good subgrade 101.
102.
103.
104.
105.
106.
107.
108.
d) None of the above
The weight of Sandy soil for Hydrometer Analysis is ______. a) 10 grams c) 50 grams b) 25 grams d) 100 grams a) b) a) b)
b) Very 109. If slag is used, the density of coarse aggregate is ______. a) 30 – 100 kg/cu. m c) 1,120 kg/cu. m b) 150 kg /cu. m d) 1,400 kg/cu. m
Mass percent loose for fine aggregates when tested in Clay lumps is _____. The weight of Clayey or Silty soil for Hydrometer Analysis is ______. a) 0.10 c) 0.80 10 grams c) 50 grams b) 0.25 d) 1.0 25 grams d) 100 grams 111. _________ is a type of cement which shall be transferred to an A 25 grams fine grained soil can be dried in about ______. elevated, air tight and weather proof bins storage. 1 hour c) 3 hours a) Portland Cement c) Bulk Cement 2 hours d) 4 hours b) Pozzolan Cemenr d) None of the above
A 25 grams sandy soil can be dried in about ______. a) 1 hour c) 3 hours b) 2 hours d) 4 hours
110.
112.
Scales for weighing aggregates and cement shall be accurate within _____. a) 0.1% c) 0.5% b) 0.25% d) 1.9% ________ is a type of soil in which most of the soil grains are of the same size. a) PoorlyThe minimum thickness of conventional concrete as the surface 113. graded c) Gap graded course in monolithic pavement is _____. b) Well graded d) Non of the above a) 50 mm c) 100 mm b) 75 mm d) 150 mm The soil grained are force apart by the water added, thus the grain is reduced, what is the method used? 114. _____________ determines the resistance of the emulsion to break a) Lubrication c) Swelling when mixed with mineral aggregate. b) Welting d) Saturation a) Viscosity Test c) Spot test b) Distillation Test d) Cement Mixing Percent passing loose for coarse aggregates when tested for clay lump is _____. a)115. 0.1 mass _____________ is an instrument used for rapid in – site percent c) 0.8 mass percent measurement of the structural properties of existing road pavement. b) 0.25 mass percent d) 1.0 mass percent a) Pundit Ultra Sonic Concrete Tester b) Dynamic Core Penetrometer The mass percent passing loose for coarse aggregates when tested c) in Falling Weight Deflectometer soft fragment is ____. a) 0.10 c) 3.5 d) Core Test b) 0.25 d) 1.00
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of water shall be uniform and all water should be in the drum by the How many days does the emulsified asphalt must be tested after end of the _15_ seconds of the mixing period delivery at temperature 40*F(4.5*C). a) 10 days c) 14 days 124. The time elapsed from the time water is added to the mix until b) 12 days d) 16 days the concrete is deposited at the site shall not exceed _90_ minutes when concrete is hauled in the truck. 117. In bituminous mixture asphalt content is 5 – 8% and 92 - 95% aggregates, what will be the amount of additives? 125. When concrete is delivered in truck mixers, additional water may a) not more than 2% c) more than 2% be added to the batch and additional mixing performed to increase b) not more than 3% d) more than 4% the slump to meet the specified requirement if permitted by the Engineer, provided all these operation are performed within _45_ 118. ___________ determines the effect of water on the cohesion of the mixture minutes after the initial mixing operation and the water and cement a) Stability Test c) Distillation ratio is not exceeded b) Solubility d) Immersion-Comprssion Test 126. Concrete not placed within _90_ minutes from the time the 119. The distance of the sample by grooving before rotating the brass cup ingredients is were charge into the mixing drum should not be use. _____. a) ¼” c) ¾” b) 127. The completed pavement shall be accepted on a lot basis. A lot ½” d) 1” shall be considered as _500_ linear meter double lane 116.
120.
The most common method of assessing strength and stiffness 128. of both Each lot shall be divided into _5_ equal segment and one core subgrade and pavement is _______. will be obtained from each segment in accordance with AASHTO T24. a) FDT c) SPT b) CBR d)Non of the above 129. Aggregate account for 92 – 95% of the weight of the bituminous mix while asphalts for 5 – 8% of the weight of the mix. The exact 121. How many days do the specimen for CBR soaked? percentage to be used is determine by the _Trial Mix_. a) 1 day c) 3 days b) 2 days d) 4 days 130. _Blue smoke_ is an indication that the asphalt is over heated 122.
When mixed at the site or a in central mixing plant, the mixing131. time shall The penetrator test is an indication of the _Consistancy_ of the not be less than _50__ seconds nor more than _90_ seconds unless mixer asphalt performance test prove adequate mixing of the concrete in a shorter time period. 132. _Marshall Stability Test_is the most common used method in the design and evaluation of bituminous concrete mixes 123. The batches shall be so charged into the drum that a portion of the mixing water shall enter in advance of the cement and aggregate. The flow
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133.
_Extraction Test_ determines the asphalt content in the bituminous 144. _Cement Mixing Test of Asphalt_ indicate the rate at which the mixes. asphalt emulsion will break when mix with aggregate .
134.
Cast in place concrete shall not be post-tensioned until at least145. _10_ The lost in weight of rock used in gabions when tested to sodium days and until the compressive strength has reached the strength specified sulfate, soundness loss shall not exceeds__9%__
135.
This is the characteristic generally used for calculation of the volume 146. Gabions dimentions are subject to a tolerance limit of _+/- 3%_ occupied by the aggregate in various mixture containing aggregates including Portland Cement concrete, bituminous concrete, and other 147. The pour point of concrete joint sealer shall be at least 11*C mixtures that are proportioned or analyzed on an absolute volume basis. (20*F) lower than the safe heating temperature, which is the Answere: Bulk Specific Gravity maximum temperature to which the material may be heated without exceeding the permitted flow. 136. _Apparent Specific Gravity_ pertains to the relative density of the soil material making up the constituents particle not including the pore148. space The penetration of concrete joint sealer, Hot Poured Elastic Type within the particles that is accessible to water. shall not exceed_90_ 137.
Weight of sandy soil needed for Hydrometer test is _100 grams_ 149.
The CBR is generally selected at _2.54 mm (0.10 in)_ penetration.
138.
Weight of silty or clayey soil needed for Hydrometer test is _50150. grams_ If the ratio at 5.08 mm (0.21 in ) penetration is greater, the should be _Rerun_ 139. These are widely used to control the characteristics of soil which are to be incorporated in roadway. Ans. Liquid and Plastic Limits 151. If the check test gives a similar result, the ratio at 5.08 mm penetration shall be__adopted or used__ 140. This is defined as the highest moisture content of which the mass attains its minimum volume but continues to lose weight /mass. Ans. Shrinkage 152. The penetration piston of CBR machine should have a uniform Limit penetration at a rate of __1.30 mm/min__ 141.
_Le Chattelier Flask___ is an apparatus used in determination of153. specificDuring soaking maintain the water level in the mold and the gravity of Hydraulic Cement. soaking tank is approximately __25.40 mm ( 1.0 in )__ above the top of the specimen 142. _Autoclave Machine_ is an equipment used in determination of soundness of Portland Cement 154. Soak the specimen for _96 hours ( 4days )__ 143.
Asphalt shall be homogeneous, free from water, and shall not foam 155. when The diameter of penetration piston is ____ . Ans. 49.63 +/- 0.23 heated to _175* C(347* F)_ mm ( 1935 cu m )
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156.
157. 158. 159. 160. 161.
The temperature of the asphalt cement delivered to the mixer shall be as required to achieve a kinetic viscosity in the range of ______. 168. Laboratory which measures, examines, calibrate or otherwise Ans. 150 to 300 cu m/s or 150 to 300 centistokes determine the characteristic or performance materials or products. Ans.. Testing Laboratory ______ is the viscosity used to grade asphalt cement . Ans. 169. Standard technical procedure to determine one or more specified 149 F ( 60*C ) characteristic of material product is called___. Ans. Test Method The coarse aggregate used in asphalt mix is ____ . Ans. Retained by 170. A document which prevents the test results and other information 2.36mm (no 8 sieve) relevant to test is called _____ Ans.. Test Report The application temperature of emulsified asphalt range from ____. Ans. 171. __________ is a document signed by the Director of BRS issued to 10-71*C Testing laboratory authorizing them to perform the required test in When the tar is used for seal coats, it shall be heated to free flowingbehalf but of DPWH. Ans. Certificate of Accreditation not to exceed ___________. Ans. 149*C 172. This test have been developed to measure the loss of cohesion as a result of water action on the compacted bituminous mixture. _______ is used to determine the soil strength parameter. Ans. Ans. Film Stripping & Immersion – Compression Test Unconfined and Tri-Axial Compression Test
173. Ans. This mean porosity or perviousness of the mixture, a dense grade ________ is used to determine the settlement characteristic of soil. mix prevent water from entering the base through the surface. Consolidation Ans.. Permeability 163. The weight of disturbed samples from hard auger or split spoon shall be 174. This is used in classifying liquid asphalt into grades. It is useful as at least__________ Ans. 1.0 kg a measure to control of consistency, particularly when run at the temperature of intended application Ans… 164. The undisturbed samples from Shellby Tube shall be at Viscosity Test least______. Ans.. 18” long 162.
This test determines the total bitumen content of a asphaltic _______ determines the pile bearing capacity by loading one or 175. more materials, which is the actual cementing constituent of the asphalt. piles and measuring settlement under load. Ans. Pile Load Test Ans.. Solubility Test 166. ________ determines the in-site shear strength of soft to medium clay. 176. This is an accelerated test to show the loss of volatiles when the Ans. Vane Shear Test sample is heated at 163*C for five hours and the loss due to 167. _______ determine the soil bearing capacity by loading a steel plate volatilization is determined. Ans… Loss on Heating usually 30 inches in diameter. Ans. Plate Bearing Test 165.
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177.
This test classifies the different asphalt into types and the different 186. types The bottom bearing block shall be at least _______ thick after any into grade. Ans.. Consistency Test resurfacing operations.. Ans. 0.9” ( 22.50 mm )
178.
For liquid asphaltic materials, this test is run on the residue after 187. The curing temperature of a specimen before testing is ______. distillation.. Ans.. Quality Test Ans. 18*C to 24*C
179.
This is one of the most important engineering properties 188. of soil.The apparatus used to determine the flash point of asphaltic It is defined as its ability to resist sliding along internal surfacematerial is called ____ Ans. Cleveland Open Cup within the mass.. Ans.. Shearing Strength of Soil 189. The asphalt samples for ductility and penetration test should be subjected to water bath at a temperature of 25*C for ____. This is an arbitrary measurement of consistency and is the basis of Ans.. 11/2 hours classification of all solid and semi-solid asphalt. Ans.. Penetration Test of Asphalt 190. The concrete shall not be left exposed for more than ____ hour between stages of curing or during the curing period. This is a process tomeasure the consistency of liquid asphaltic materials Ans.. ½ hour to determine their fluidity or resistance to flow. Ans.. Viscosity Test 191. The rate of application of bituminous prime coat is ____. a) 1-2L/sq. m. c) 0.2-1.5L/sq. m. _________ was developed in order to differentiate bituminous materials b) 0.2-0.7L/sq. m. d) 0.5-2L/sq. m. with respect to hardening characteristic. Ans.. Thin Film Oven Test 192. Another name for asphalt joint filler is_______. a) asphalt cement c) blown asphalt Plant-mixed bituminous mixtures should be sampled in accordance with b) rock asphalt d) cutback asphalt the Standard Method of Sampling Bituminous Mixture. A sample not less than ______ kg is taken and place in sample bag that would insure 193. against In asphalting work, there are _______ phase of rolling contamination. This is taken every 75 cu m or 130 tons of mix. a) 2 c)1 Ans.. 10 kgs b) 3 d) 4
180.
181.
182.
183.
184.
The bearing blocks of the compression machine should be 194. at The _____ test determines the asphalt content in the bituminous least _____ greater than the diameter of the specimen. mix. a) Grading Ans.. 3.0 % c)Extraction b)Bulk Specific Gravity d) Absorption 185. The bottom bearing block shall be at least _____ thick when new Ans. 1.0” ( 22.50 mm ) 195. In a bituminous mix, there are 3 kinds of aggregate. What kind of passes the no. 200 sieve?
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a) Coarse b) Fine
c) Mineral Filler d) Admixture
196.
Liquid asphalt is also called ___________. a) Cutback asphalt c) Blown asphalt b) Emulsion d) Asphalt cement
197.
The different test for soil classification are: a) compaction and FDT b) Hydrometer test and moisture content c) Grading, LL and PL test
198.
199.
200.
201.
202.
203.
Is it really necessary to cure concrete specimen? a) Yes c) No b) None of the two
204.
The kind of test that determines the consistency of concrete is _____. a) Slump test c) Abrasion test b) Specific Gravity
205.
What is the dimension of concrete cylindrical sample? a) 6” dia. And 12” high c) 8” dia. And 14 high b) 4” dia and 8” high The apparatus/equipment used in the liquid limit and plastic limit test is called___ . a) sieves and chisel c) mortar 206. and In the absence of concrete beam mold at the project site, are pestle b) Atterberg Device concrete cylindrical molds allowed by the specification to be used in and glass plate sampler for item 311 – PCCP? a) Yes b) may be _________ is a method of laboratory sampling. c) No a) Mixing c) Proportioning b) Using mechanical splitter/quartering 207. The minimum percent compaction for embankment is _______. a) 92% c) 95% In laboratory compaction test/moisture density relation test, what is c) the 97% specification of rammer? a) 5.5 lb. (2.5 kg) with 12 in drop c) 10 lb. (4.5 kg) in weight with208. 18 in The minimum percent compaction for base of the road is ______. drop b) 8 lb. (3.6 kg) in weight with 16 in drop a) 100% b)110% c) 105% What is the specification of mass present passing in sieve 0.075 mm (No. 200 ) grading “A” for aggregate base course. 209. The CBR value of aggregate base course is not less than ____. a) 20-14 c) 0 – 6 a) 80% b) 90% b) 0 – 12 c) 85% The number of specimen samples in testing concrete hollow block 210.is The CBR value of aggregate subbase course is not less than ____. _____. a) 6 a) 25% b)35% pcs./20,000 units (3 for absorption test and 3 for strength test ) c) 30% b) 4 pcs./20,000 units c) 8 pcs./20,000 units 211. The minimum compressive strength for class A concrete is ________. a) 3,000 psi. ( 20.7 MN/sq.
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m) 2,400 psi. ( 16.7 MN/sq. m. ) c) 5,000 psi. ( 37.7 MN/sq. m. )
219.
b) The solvent used in extraction of bitumen is _____. a) Diesel oil b) Gasoline c) Water
212.
What is the significance of determination of the tensile properties 220.of The percent of bitumen content is computed based on ______. reinforcing steel bars? a) This method is intended to determine the a) mass of raw sample b) mass of dry aggregate yield and tensile strength of the bar as well as its elongation, and is used c)mass to of asphalt classify the bars into grade b) This method is intended to evaluate the ductile properties of the reinforcing 221. The method used to determine the grading of aggregate bars c) None of the above extracted from bituminous mixture is ____. a) Mechanical analysis of extracted aggregate 213. A tie bar should be ______ b) Stability Test a) deformed bar b) round bar c) flat bar c) Viscosity 214. 215.
A dowel bar should be ____________. a) deformed bar b) round bar The mortar for masonry shall consist of ________. a) one part Portland Cement and 2 parts of sand b) one part Portland Cement and 3 parts of sand c) one part Portland Cement and 4 parts of sand
222. c) flat bar 223.
The drying temperature of sample is ________ a) 110 +/- 5*C b) 100 +/- 5*C c)100*C
_______ is a solid asphalt which is a basic constituent of all other asphalt called as hot asphalt or penetration grade asphalt. a) Asphalt Cement b) Emulsified Asphalt c) Cutback Asphalt 216. The apparatus used to measure the thickness or height of compacted bituminous paving mixture. 224. ________ is a kind of liquid asphalt which is a mixture of asphalt a) Ruler b) Vernier Califer c) Steel Tape cement and kerosene. a) Medium Curing Cutback 217. It is used in calculating the unit weight of the mixture and the degree b)of Asphalt Cement compaction of the asphalt pavement. c) Rapid Curing Cutback a) Bulk Specific Gravity of compacted bituminous mixtures using saturated surface dry specimen. 225. ________ is a kind of liquid asphalt which is a mixture of asphalt b) Dry unit weight of compacted bituminous mixtures cement and oil. a) Slow Curing Cutback c) Mass of specimen in water b) Emulsified Asphalt c) Blown Asphalt 218. The test which covers the quantitative determination of bitumen in hotmixed paving mixtures and pavement samples for specification acceptance, 226. ________ is a kind of liquid asphalt which is a mixture of asphalt service evaluation, control and research. a) Extraction cement and gasoline a) rapid Curing Cutback b) Spot Test Flash Point
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b) Blown Asphalt c) Joint Filler 227.
228.
229.
230.
231.
232.
233.
234.
An apparatus used to determine the specific gravity of asphalt is called ______. a) Metal Pycnometer b) Glass Pycnometer c) any bottle
Asphalt is defined as _________. a) A petroleum product 235. Consistency test for asphalt is called___________. b) A dark brown to black cementitious materials whose consistency range a) Viscosity s b) Slump test c) from solid to semi-solid and whose main constituent is called bitumen which Loss in ting is either found in nature or as a residue in petroleum refining. c) None of the above 236. A process of volatilization test which measures the relative proportion of asphalt to oil. a) Distillation It is a kind of liquid asphalt which is a mixture of asphalt cement andb) Extraction c)Float Test water with emulsified with pungent odor. a) Emulsified Asphalt b) Asphalt Cement c) Rapid 237. CuringIt is a period wherein the asphalt begins to melt. Asphalt a) Softening Point b)Boiling Point c)Fire Point Joint filler in concrete pavement is a __________. a) Blown Asphalt b) Hot asphalt c) Liquid 238. The sampling requirement of asphalt is _____ . asphalt a) 1 sample for every 200 drums or 40 metric tons b) 1 sample for every 100 drums A device used to measure the relative hardness of asphalt is __________. c) 1 sample for every shipment a) Penetrometer b) Spectometer c) Vicat Apparatus 239. The component of bituminous mixes which range from 92 to 96% is called __________. a) Bituminous Blended Aggregate A property of asphalt cement to stretch without breaking is b) Concrete Aggregate called________. a) Ductility b) c) Sand Durability c)Tensile 240. ____________ is a property of bituminous mixes in pavement to It is a point where the volatile components of asphalt will evaporate.resist deformation or displacement due to impose load or repeated a) Fire Point b) Flash Point c) Center loading. a) Stability Point b)Flexibility c)Tensile It determines whether asphalt is over heated or not during the 241. process of ____________ is a property of bituminous mixes in pavement to manufacture. a) Spot Test b) Boil Test resist disintegration or deterioration due to the action of water, traffic c) Extraction Test and changing climate a) Durability b) Flexibility c)Ductility
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242.
____________ is a property of bituminous mixes in pavement adjust itself to settlement a) Flexibility b) Rigidity 250. The rate of application of prime coating using cutback asphalt is Hardness ______. a) 1-2 liters/sq. m b) 0.5-1 liter/ sq. m c) 2-3 liters/sq. m 243. These are the factor affecting the workability of bituminous mixes a) Gradation of aggregate, quality of asphalt, and temperature of mix 251. The rate of application of tack coating using liquid or emulsified b) Surface texture and temperature mix asphalt is __________. c) Quantity of aggregates and asphalt content a) 0.2-0.7 li/sq.m b) 0.1-0.5 li/sq. m c) 2 li/sq. m. 244.
The dry molded asphalt sample in the immersion compression 252. test is The rate of application of seal coat using asphalt cement is submerged in water for ____. ________. a) 0.9-1.8 li/sq. m a) 4 days b) 4 hours c) 2 days b) 10-11 li/sq. m c) 8-9 li/sq. m
245.
The percent index retention is computed in the formula ___________. 253. The rate of application of seal coat using cutback asphalt is a) Wet Stability/Dry Stability x 100 ________. a) 1.5-3.0li/sq. m b) Dry Stability/Wet Stability x 100 b) 2.0-3.0 li/sq. m c) 1-2 li/sq .m c) Wet Stability – Dry Stability/Dry Stability x 100 254. The primary quality control mechanism for the production of The sampling requirement of bituminous mixes is _____. asphalt mies with high degree of uniformity that will satisfy job a) 1 sample for every 75 cu. m. requirement is ________________. b) 1 sample for every 150 cu. m. a) Job mix formula b) Quality control formula c) Assurance c) 1 sample per delivery per day 255. The objective of designing the asphalt mixture is determination of The application of liquid asphaltic material on a prepared untreated ______. base a) Type and grade of asphalt, is _____. a) Prime proportion of coarse, fine and mineral filler, if used and asphalt Coating content. b) Seal Coating b) To produce a desirable characteristic of pavement which are c) Tack Coating stable, durable, flexible and skid resistance. C) All of the above The application of liquid asphaltic material to an existing surface is ____ . a) Tack Coating c) Prime Coating 256. The percent asphalt content in hot laid bituminous mixture range b) Seal Coating from ______ a) 5-8% b) 4-6% c) 5-10% The application of asphaltic material and aggregate to an existing surface for the purpose of sealing it against the infiltration of water 257. or The placing temperature for bituminous mixture measured in the surface moisture is called ____ a) Seal Coating truck prior to dumping is ______. b) Tack Coating c) Prime Coating a) at least 107*C b) at least 120*C c) at least 150*C
246.
247.
248.
249.
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258.
259.
260.
261.
262.
The second phase of rolling the spread bituminous mixture is called 266. The wearing away of the pavement surface caused by the breakdown rolling which is the one responsible to attain the maximum dislodging of aggregate particle is called ______________. density. This rolling is carried out by the use of ______. a) raveling b) alligator crack c) rutting a) pneumatic roller b) steel roller c) sheepfoot roller 267. Interconnected cracks forming a series of small blocks resembling The significance of final rolling is to remove the roller marks to previous an alligator’s skin or chicken wire is called ____________. rolling in order to have a good finish pavement with a temperature of 160*F. a) alligator cracking b) reflection cracking c) bleeding a) True b) False c) Maybe 268. __________ is the type of cement to be used in the DPWH The proper way of rolling should begin at _____________________. infrastructure project as indicated in the Blue Book. a) the sides and proceeds longitudinally towards the roads center, eacha) strip Portland Cement Type I b) Pozzolan Cement Portland overlapping on half the roller width, gradually progressing the crown of Cement the Type II road b) the center and proceeding longitudinally toward the side of the road 269. If the fine aggregates are subjected to five cycles of sodium c) any part of the road provided each strip overlapping on half the rollersulfate soundness test, the weighted loss shall not exceed width ___________ a) 10 mass percent b) 5 mass percent c) 3 mass What is the minimum degree of compaction of asphalt pavement? percent a) not lee than 97% of the density of the laboratory compacted specimen b) not less than 100% of the density of the laboratory compacted specimen 270. If the coarse aggregate are subjected to five cycles of sodium c) not less than 85% of the density of the laboratory compacted specimen sulfate soundness test, the weighted loss shall not exceed____________. What is the color of asphalt when it is overcook? a) 12 mass percent b) 15 mass percent 10 mass a) yellowish brown b) black c)gray percent
263.
_____________ determines the thickness and density of compacted 271. asphalt The mass percent of wear of coarse aggregates for item 311 pavement. a) Core testwhen tested by AASHTO 96 is not greater than ____________. b) FDT c) X-ray a) 40% b) 45% c) 50%
264.
The cored sample of asphalt pavement is measured at ______________. 272. The design of concrete mix specified by the blue book is based on a) approximately quarter points ________________. a) b) three points Absolute Volume Method b) Area Method c) American Method c) two points
265.
Too much asphalt content in the bituminous mixes causes ____________ . a) bleeding b) potholes c) cracks
17 -
273.
274.
275. 276. 277.
278.
279.
280. 281.
282.
The minimum flexural strength requirement of beam sample when b) Sieve No. 200 tested by third point loading method is ____________. c) Gillmore a) 3.5 Mpa b) 3.8 Mpa c) 4.0 Mpa 283. A mixture of cement and water is called ____________. The minimum flexural strength requirement of beam sample when a) cement paste b) mortar paste c) tested by midpoint method is ____________. concrete paste a) 4.5 Mpa b) 3.5 Mpa c) 5.0 Mpa 284. The apparatus used to determine the initial and final setting of ____________ are additives used in mixing concrete. cement in the laboratory is _________. a) sodium chloride b) admixtures c) curing agent a) Gillmore needles b) Bailey needle c) Vicat apparatus ____________ determines the consistency of concrete. a) Slump Test b) consolidation test c) viscosity 285. The compressive strength of cement mortar sample in seven days is not less than _________. a) 19.3 MN/sq. m Equipment used in the consolidation of fresh concrete. b) 20 MN/sq. m c) 24 MN/sq. m a) jack hammer b) vibrator c) drilling machine 286. What is the appearance of the molded cement paste which fails to meet the autoclave expansion.______________. The prescribed forms to be used in concrete paving is called ____________ a) crumble b) shiny c) changes color a) steel forms b) wooden c) combination of steel and wood 287. The dimension of beam sample for paving concrete is ___________. a) 6” x 6” x 21” b) 6” x 6” x 24” c) 4” x 4” The initial setting time of Portland cement is not less than x218” _________________. a) 30 min. b) 60 min. c) 90 min. 288. The critical number of days of curing concrete is ____________. a) first seven days b) first 10 days c) 28 days The final setting time of Portland cement Type I is _____________. a) 10 hrs. b) 24 hrs. c) 36 hrs. 289. The standard dimension of concrete cylindrical sample is ___________. a) 6” dia. and 12” tall b) The standard sand used in testing the mortar strength of Portland 6” dia. and 6” tall c) 6” dia. and 8” tall cement is called __________. a) Ottawa Sand b) Beach Sand c) River Sand 290. There are two layers in performing sampling of beam samples. How many number of blows are required per layer? The apparatus used in determining the fineness of Portland cement a) by 63 blows b) 75 blows c) 50 blows air permeability is __________ . a) Blaine Air Permeability Apparatus
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291.
There are three layers in performing sampling of concrete cylinder. How one ( 1 ) set b) two ( 2 ) sets c) many blows are required per layer? three ( 3 ) sets a) 25 blows b) 30 blows c ) 35 blows 299. In a completed pavement, what is the minimum core samples 292. The formula which determines the proportion of the mix which can meet required before payment is effected? (Assuming that the thickness is the desired strength requirement of concrete is called____________. 23 cm. ) a) Five a) design of concrete mix b) Boyle’s Formula c) Bernouli’s holes per km per lane b) One hole per 500m c) P.E. Formula Certificate 293.
The minimum testing requirement for every project is indicated300. in a duly In a Barangay road, what is the minimum requirement for approved________. a) Quality Control Program thickness determination of its completed pavement? b) Program of Work a) Five holes per km per lane b) P.E. Certificate c) Work Schedule One hole
294.
c)
It is prescribed in each project based on estimated quantities and 301. A qulity test is one of the minimum requirement for item 200 – specifies the kind and number of test for each item of work. aggregate subbase course. a) True b) a) Minimum number of work False c)optional b) Minimum Testing Requirement c) Work Schedule 302. There is no CBR test for item 300 – aggregate surface course. a) True b) False c) optional 295. Embankment materials delivered at the job site was about 12,000 cu. m. The minimum test requirement calls for 1 – G, P, C for every 1,500303. cu. m. In item 311 and 405, grading is perform _______________. a) 10 – G, P, C b) 8 – G, P, C c) 6 – G, P, C a) for every 75 cu. m. b) for every 300 cu. m. 296. of There is 1 – Q cement required for every _________________. c) none a) 4,000 bags or fraction thereof b) 2,000 bags or fraction thereof 304. For pipe culverts and storm drains, the minimum test is 1 – Pipe c) 10,000 bags for every 50 pipes. What is the alternative requirement? a) 1 – set consisting of 3 concrete cylinder samples for not more than 297. There is – Q of cement required for every ____________________. 25 pipes cast in the field and 1 – inspection report for each size for a) 20,000 kg or fraction thereof not more than 25 pipes cast in the field. b) 10,000 kg or fraction thereof b) inspection report is enough c)115,000 kg or fraction thereof c) Mill Certificate 298.
How many set of beam samples taken for every 75 cu. m. of concrete 305. The minimum test requirement for paint is ______________. poured per day? a) a) 1 – sample for every 100 cans or fraction thereof
19 -
b) 1 – sample for every 50 cans or fraction thereof c) Mill Certificate
312.
Peat and muck are ______________. a) fair subgrade spoil b) stable soil
c) unstable soil d) good subgrade soil
306.
The minimum test requirement for water used in concrete for a questionable source is ______. 313. a) The slump test on concrete is a measure ______________ P.E. Certificate b) 1 – Quality Test c)a) strength c) consistency Inspection Report b) unit weight d) durability
307.
Based on the maximum dry density obtained by laboratory test, 314. the The fineness modulus is highest of _________________. degree of compaction required for aggregate subbase should be at leasta) fine sand c) very coarse sand _______________________. a) 95% b) very fine sand d) coarse sand c) 100% b) 98% d) none of the above 315. If concrete is continuously moist cured, it will gain strength beyond 180 days. Per our present Specification for Highways and Bridges including a) True c) it depends on curing temperature amendments, it is mandatory to open PCCP to traffic not later than b) False ___________. a) 7 days after pouring b) 21 days after pouring 316. The quality of paying concrete is usually measured by its c) 14 days after pouring d) 28 days after pouring _____________. a) compressive c) flexural In casting reinforced concrete railings, the concrete used is b) tensile d) bond strength _____________. a) Class A1 c) Class C1 317. Generally speaking, batching of concrete aggregates by volume b) Class A2 d) any of the preceding classes is preferable than weight. a) True c) False For efficient compaction, the embankment materials should at the time b) they are the same of rolling be ______. a) dry c) at optimum moisture content 318. If angular coarse aggregate is used in a concrete mix, it will b) wet d) at maximum moisture content require more ________________ a) water c) water and fine aggregates For a road base course the most preferable material is one with CBRb) offine aggregates d) neither a and b ____________. a) 60 c) 50 319. b) 30 The most favorable period for curing concrete is ______________. d) 80 a) during the first few days or week b) after 3 days c) after one week d) before 28 days
308.
309.
310.
311.
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320.
321.
322.
323.
324.
a) 4 c) 6 Lower water content ratio in concrete mixes improves ________________. b) 5 d) 7 a) strength c) water tightness b) durability d) all of the preceding 329. What is the correct proportion for concrete masonry work? a) 1: 2 c) 1: 4 When concrete must be placed in a sloping surface, placing should start b) 1: 3 d) 1 : 5 at the __________. a) bottom c) can be top or bottom b) top 330. The opening of No. 4 sieve is bigger than the opening of a ¼ sieve. a) true b) The maximum percent abrasion loss allowed for concrete coarse false c) they are the same aggregate is __________. a) 30% c) 45% b) 40% d) 50% 331. The standard compaction test on predominantly fine grained soils is performed on soil fraction passing sieve no. ___________. The plasticity index of aggregate base course should be not greater a) than 200 c) 16 ___________. a) 6 c)10 b) 40 d) 4 b) 8 d) 12 332. Which plasticity index would you prefer for the base course of In casting of reinforced concrete pile, the concrete used is ____________. PCCP? a) less than 6 a) A1 c) C1 c) 10 to 12 b) b) D d) C2 6 to 9 d) more than 12
325.
The natural water content of highly organic soil is __________. 333. A soil which is classified A-7 by the highway research board a) less than 20 c) between 50 and 100 method will have a subgrade rating of __________. b) between 20 and 50 d) more than 100% a) excellent c) fair b) good d) poor 326. Which of the following dead load is equivalent for loose sand, earth and gravel fill? 334. a) 2,403The empirical number used in design is ____________. tons/cu. m. c) 1,603 tons/cu. m. a) plasticity index b) group index b) 1,922 tons/cu. m. d) 2,150 tons/cu. m. c) both of the preceding 327.
Rate of application for curing compound is _______________. a) 0.30 li/sq. m. c) 0.15 li/sq. m. b) 0.20 li/sq. m. d) 0.10 li/sq. m.
335.
328.
During coring of completed pavement, how many cores /km/lane 336. is Water content of soil is generally base on ____________. required as per specification? a) total weight of soil c) weight of solids b) total volume of soil d) unit weight test
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Soil is fully saturated at optimum moisture content. a) true b) false c) it depends on void ratio
337.
Optimum water content of soil is determined by ______________.345. Soil is fully saturated if the water content is ______________. a) field density test c) compaction test a) at optimum amount c) more than 100&% b) liquid limit test d) unit weight test b) 100% d) none of the peceeding
338.
The particle size distribution of soil is determined by __________________. 346. The density to which a soil can be compacted is related to a) liquid limit granular c) sieve analysis test ____________. a) compactive effort b) plastic limit test d) any of the preceding test c) both a and b b) water content d) neither a or b Which of the following are most suitable for construction of highway embankments? 347. a) Specification require 1 quality test every ___________ of asphalt granular c) plastic mix. a) 40 ton b) fine- grained d) clayey c) 50 tons b) 130 tons d) 150 tons The particle size distribution of sandy gravel is determined by ________. a) hydrometer test c) dilantacy test 348. All asphalt are _______, they became harder as temperature b) sieve test d) any of the preceding test decreases and softer as their temperature increases. a) thermoplastic c) brittle The best soil for a road subgrade would behave a group index of b) hyrophobic d) none of the above ___________ a) less than 3 c) 11 to 15 349. The viscosity of the asphalt during mixing and lay down is b) 5 to 10 d) 16 to 20 ____________. a) viscosity at 135*C c) viscosity at 60*C b) The highest moisture content in the plastic state of fine grained soil viscosity is at 125*C d) viscosity at 163*C the ___________. a) liquid limit b) plastic limit 350. The trial section for compaction for each type of fill materials and Which of the following is characterizes unsuitable materials? type of equipment to be used in the work should have an area a) soil with liquid limit exceeding 80 of__________. a) b) plasticity index exceeding 55 500 sq. m. c) 600 sq. m. c) soil with natural water content exceeding 100% b) 335 sq. m. d) 400 sq. m. d) all of the above 351. Control slip shall have an area of approximately ____________. Shringkage factor test is _______________. a) 500 sq. m. c) 600 sq. m. a) test to determine pay volume b) 335 sq. m. d) 400 sq. m. b) test to determine strength characteristic c) test to determine volume change 352. Fine aggregate used in asphalt mix is the one ________________. d) test to determine maximum density a) passing the no. 8 sieve
339.
340.
341.
342. 343.
344.
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b) passing the no. 30 sieve c) passing the no. 200 sieve d) returned the no. 8 sieve 353.
The corrugation produce by brooming is _____________. a) 1.5 mm. c) 2.5 mm. b) 2.0 mm. d) 1.0 mm.
354.
The higher the ________, the lower the penetration. a) specific gravity c) durability b) viscosity d) solubility
355.
356.
357.
358.
359.
a) 60% b) 55% 360.
c) 50% d) 70%
In DPWH Contract Projects, Quality Control is the sole responsibility of ___________. a) the DPWH project personnel b) the government’s Materials Engineer c) the Contractor
361.
As Materials Engineer, when is the right time to start sampling and testing of materials to be incorporated into the work? a) before final payment b) before start of work items The required thickness of the thermoplastic paint in PCCP is __________. c) before first partial payment a) 3.2 to 4.8 mm. c) 3.3 to 3.8 mm. b) 3.0 to 4.5 mm. d) 3.2 to 4.0 mm 362. The Spot Test on asphalt is used to determine what? a) cleanliness c) safe working What percent of hydrated lime shall be added to the mixture during temperature b)overheating during mixing operation of asphalt mix? manufacture d) viscosity of the mix a) 0.5 to 1.0 mass % c) 0.75 to 1.2 mass % b) 1.0 to 1.5 mass % d) 0.2 to 0.7 mass % 363. Under what climate conditions do we use higher penetration grade asphalt cement? a) hot climate As Materials Engineer, what would you recommend in order to checkc)the cold climate b) suitability and efficiency of the equipment to used prior to subbase rainy weather d) none of the above construction for item 310, Bituminous Concrete Surface Course? a) make a trial section c) make trial mix 364. What is the basis for rejection or acceptance of any construction b) establish control strips d) none of the above materials? a) Certificate of Billing c) Statement of work accomplished b) Quality of factor – produced reinforced concrete pipes may be best Materials Test Report d) none of the abcve established through what? a) compressive strength test 365. Initial rolling of bituminous mixes shall be performed with a ______ b) flexural strength test roller. a) vibrator c) c) core test sheepfoot d) crushing strength test b) pneumatic d) none of the above Result of Immersion – Compression test conducted on a bituminous 366. mixIn abituminous mix sample, what is the % of asphalt by a) weight sample are as follow: Dry stability + 2,000 Kpa, Wet stability = 1,000 Kpa, of aggregate and by b) weight of mix? Given the following data: What is the resulting Index of Retained Strength? Weight of dry aggregates (after extraction) = 950 grams: Weight of
23 -
Mix = 1010. A. a) 6.32% B. a) 5.50% 367.
368.
369.
370.
b) penetration grade and quantity of asphalt d) none of the above c) density and compaction of completed pavement d) 5.94% 375. In asphalt pavement construction, how is the surface level of the What grade of asphalt has a penetration grade of 0 – 30? completed pavement check? a) by T – core test b) by a) emulsified asphalt c) blown asphalt density test c) by the use of 3 meter straight edge b) asphalt cement d) none of the above 376. What primarily influence the grade of asphalt to be selected? Problems regarding quality of construction materials shall be reported a) penetration c) climate directly by the Contractor’s Materials Engineer to the ____________. b) class of aggregate d) temperature a) DPWH Materials Engineer c) Contractor’s Project Engineer b) Contractor d) none of the above 377. Who will approve the Job Mix Formula? a) DPWH Project/Materials Engineer If the RC pipes in the forgoing problem is not cast in the field, how many b) Contractor pipes will be required to be subjected to the Crushing Strength test? c) Contractor’s Materials Engineer a) 75 pcs. b) 70 pcs. c) 100 pcs 378. What control during the mixing and compaction of the bituminous How many concrete cylinder samples are required for 3,500 pcs. of pavement is of great significance in the resulting pavement? reinforced concrete pipes? a) 14 sets of 3 c) 75 sets of a) 3 compaction c) grading of aggregates b) 140 sets of 3 d) none of the above b) density d) temperature b)5.50% b) 6.32%
c) 6.0% c) 6.0%
371.
What is the bitumen obtained from the distillation coal or wood? 379. In asphalt pavement construction, there are three phases of a) rock asphalt c) emulsion rolling; what kind of roller is required to be used for the final b) tar d) none of the above compaction and smoothing? a) pneumatic roller b) sheepfoot roller c) tandem- smooth wheeled 372. How do you reduce the viscosity of Medium – Curing Cutback Asphalt? roller By mixing it with _______. a) gasoline c) kerosene 380. What is the maximum speed of the roller in compaction of asphalt b) diesel d) emulsion pavement? a) 4 kph c) 8 kph b) 373. What establish the exact percent of aggregates and asphalt content5inkph a d) 6 kph bituminous mix _______. a) design mix c) job mix formula 381. What shall be checked after final rolling? b) job order d) extraction formula a) degree of compaction b) optimum asphalt content c) quantity of aggregates 374. What greatly influence the serviceability of an asphalt pavement? a) quality of aggregates and climate
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382.
383.
384. 385.
386.
When is the completed asphalt pavement opened to traffic? 391. For 250 gallons of Reflectorized Traffic Paint, how many samples a) when the asphalt has cooled to atmospheric temperature are required to be submitted for Quality Testing? b) when the asphalt has cooled to +/- 10*C of the spreading temperature a) 3 samples b) 2 samples c) 4 samples c) when asphalt is still hot 392. The bituminous mix should have a mass % of air voids within the The apparatus used in determining the consistency of asphalt cement range is of __________. a) 2 to 3% b) 1 to 4% ___________. a) penetrometer b) viscometer c) c) 3 to 5% thermometer 393. Traffic paint shall be applied to the pavement at the rate of 0.33 How is the consistency of liquid asphalt determined? li/sq. m. and shall dry sufficiently to be free it from cracking from a) viscometer b) Tag open cup c) penetrometer ___________. Ans. 150to 30 mins. The Optimum Asphalt Content obtained in Marshall Stability Test is the average asphalt content of the Maximum Stability, Maximum Bulk 394. Specific This is the only class of riprap that may consist of round natural Gravity, and _________________. a) 4% Air Voids b) 2 mm flow stones. Ans.. Class A Riprap c) 5% mineral content 395. The surface of riprap shall not vary from the theoretical surface What test determines the safe working temperature of the asphalt? by more than _________ mm. ay any point. a) Ductility test b) Flash Point Test c) Stability Test Ans.. 100 mm.
387.
_________________ are usually tested for extraction. 396. Fine aggregates of masonry shall all passes the ________ mm. a) Asphalt Mixes b) emulsions c) asphalt cement sieve. Ans.. 2.36 mm (No. 8 sieve )
388.
Steel bars for the concrete reinforcement are tested for their __________ 397. Mortar that is not used within ______ minutes after the water has properties. a) tensile and bending b) compressive been added shall be discarded. c) crushing Ans. 90 minutes
389.
What method is used in determining the strength of concrete pipes? 398. Maximum projection of rock faces beyond the pitch lines shall not a) third point loading method be more than _____. Ans.. 50 mm. b) center point loading method c) three edge bearing method 399. In hot or dry weather, the masonry shall be satisfactory protected from the sun and shall be kept wet for a period at least _________ 390. How many units shall be tested for strength, moisture and absorption after in completion. Ans.. a lot of 120,000 CHB Ans.. 18 units Three ( 3 ) days
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400.
401. 402.
403.
404.
405.
406.
407. 408.
409.
For pavement markings, the composition of white paint shall be _______ pigment and ______% of vehicle 410. Expansion joint filler having a nominal thickness of less than Ans.. 42 – 45 % pigment ; 53 – 55% vehicle ________ mm. shall not be subject to a requirement for compaction. Ans.. 13 mm. The composition of yellow paint shall be _______ pigment and ______ vehicle. Ans.. 23% pigment and 77% vehicle 411. Strip of the joint filler that do not conform to the specified dimension within the permissible variation of ______ mm. thickness The __________ material shall be of such quality that it will not darken________ or in depth shall be reflected. become yellow when a thin section is exposed to sunlight. Ans. +/- 1.6 to – 0 thickness ; +/- 3mm. in depth Ans.. Non volatile material 412. These are finely divided residue that result from the combustion ___________ consist of beads of good quality, optically clear, lead freeof ground or powdered coal. Ans. Fly Ash glass with not less than 90% reasonably spherical and free from flows. Ans. Ballotini for reflective road paint 413. A light spray application of asphalt to an existing pavement as a seal to inhibit raveling, or seal the surface or both. ___________ is a reflector which shall be the short base type having aAns.. Fog Seal maximum base area of 180 mm x 140 mm. Ans. Flash surface reflective stud 414. A light application of bituminous material for the express purpose of laying and bonding loose dust. The pads shall be highly resilient and durable rubber reinforced withAns.. Dust Binder canvas and shall have a design life of at least ____________. Ans. Five ( 5 ) years 415. The aggregate that is graded from the maximum size, down to and including filler, with the object of obtaining a bituminous mix The reflectors shall have the minimum specific intensity value expressed with a controlled void content and high stability is called. Ans. as ______ of illumination. Dense – graded aggregate Ans.. Candle power per foot candle 416. The bituminous material used to fill and seal cracks in existing The reflector shall support a vertical load of _____ when tested. pavement is called______. Ans. Crack filler Ans. 10 KN 417. The application of sprayed bituminous coatings not involving the When raised profile type reflector are specified the approved _______ use of aggregate is called_____. epoxy adhesive shall be used . Ans. Bituminous application Ans. Two ( 2 ) parts 418. A mixture of bituminous material and mineral aggregate usually Expansion joint filler having a nominal thickness of less than ________prepared in a conventional hot – mix plant or drum mixer at a mm. shall not be subject to a requirement for water absorption. temperature of not more than ______ and spread and compacted at Ans. 9.5 mm
26 -
the job site at a temperature above _______. Ans. 260*F (127*C)/200*F (93*C)
426.
__________ is a combination of bituminous material and mineral aggregate applied at ambient temperature for use in patching holes, depression and distress area in existing pavement. Ans. 419. __________ is an application of low viscosity bituminous material to an Maintenance Mix absorptive surface designed to penetrate, bond, and stabilize this existing surface and to promote adhesion between it and the new super-impose 427. __________ is a pavement construction using essentially one-size construction. Ans. Prime aggregate which penetrated in place by an application of high Coat viscosity bituminous material followed by an application of smaller size course aggregate and thoroughly rolled, 420. A uniform application of a mixture of emulsified asphalt, fine aggregate, Ans. Penetration Macadam mineral filler, and water to an existing pavement , single or multiple application may be used. Ans. Slurry Seal 428. The glass beads used in traffic paint shall have a minimum of ______ % true spheres. Ans. 70% 421. _____________ is an application of bituminous material applied for an existing, relatively non-absorbent surface to provide a thorough bond 429. The glass beads shall have a minimum refractive index of ______ . between old and new surfacing. Ans. Tack Coat Ans. 1.50 422.
____________ is a bituminous aggregate application to any type 430. of road or The white thermoplastic material shall not exceed a yellowish pavement surface for the purpose of providing a wearing course, or surface index of ______. Ans. 0.12 seal or both. Ans. Treatment and Seals 431. The thermoplastic material shall have a maximum percent residue of _____ after heating at 8 +/- 0.5 hours at 218 +/- 2*C 423. ___________ is a bituminous-sand application to an existing pavementAns. to 28% seal the surface and to function as a light – wearing course. Ans. Sand Seal 432. The softening point of thermoplastic paint should be _______. Ans. 102.5+/-9.5*C 424. ___________ is a spray application of bituminous material used to temporarily stabilize a recently seeded area. The bituminous material 433.can be What kind of water shall be used in laboratory test especially if it applied to the soil or to a straw or hay mulch as a tie down. deals with chemical? Ans. Distilled Water Ans. Mulch treatment 434. Liquid limit brass cup with a sample is raised and allowed to drop 425. ___________ is a combination of bituminous material and aggregate that sharply is on the base through a height of what? physically mixed by mechanical means, spread on the job site and Ans. 10 mm. compacted. Ans. Bituminous Aggregate Mixtures 435. How many rotation per second will the crank of a liquid limit device be rotated? Ans. 2 rotation per seconds
27 -
436.
What is the required size of calibrated sand used for FDT ? b) cause of reduction in ultimate strength of concrete Ans. Any clean, dry, free- flowing, uncemented and passing # 10 and c) induce corrosion of R.S.B retained # 200 sieve d) b and c
437.
What is the degree of compaction of soil having a maximum dry 444. densityIf the soil is properly compacted at MDD it will __________. of 2,250 kg/cu. m. and wet density of soil from hole is equivalent to 2,335 a) increase stability/strength kg/cu. m. and average moisture content of 8.85%? b) minimize future settlement Ans. % degree of compaction = (dry density/Max. dry density ) x 100 c) decrease permeability = [2,335/(1+8.85/100)] / 2,250 x 100 d) all of the above = ( 2,145.15/2,250 ) x 100 = 9.34% 445. Asphalt construction, compaction must be completed before the mixture cools to _______. 438. What is the standard diameter of an orifice in FDT sand cone? a) 165*F ( 60*C ) c) 185*F ( 71*C ) Ans. ½” ( 12.7 mm ) b) 175*F ( 65*C ) d) 195*F ( 76*C ) 439.
440.
441.
442.
443.
Soil properties can be improved by ____________. 446. Which contractor are required by DPWH to own the minimum a) Adequate compaction c) Maximizing water contentmaterial testing equipment for pre-qualification purposes? b) Additional binder d) Stabilization a) small c) large b) medium d) all of the above As construction progresses, you noticed that the materials delivered at the project site are different from the one tested and passed the 447. As percent asphalt increases in Marshall stability test, the % Air requirement, as Materials Engineer what would you do? voids____________. a) increases c) remains a) Authorize the use of the materials constant b) b) Conduct immediate retesting of the materials for verification purposes decreases d) a or b c) Reject materials d) Replace the materials 448. The aggregate component contribute to shear strength and stability of bituminous mixture . The desirable shape and surface What is the test criteria for RCPC test with three ( 3 ) Edge Bearing Test? texture of aggregate is _________. a) 0.3 mm. c) 0.5 mm. a) round and smooth surface c) round and rough b) 0.4 mm. d) 0.6 mm. texture b) angular and smooth surface d) angular and rough texture The Immersion – Compression test is prepared to determine_________. a) ductility c) stability 449. You can classify a soil sample in accordance to AASHTO through b) solubility d) flexibility _________. a) Grain size analysis c) both a and b b) Atterberg The use of sea water in reinforced concrete is not allowed due to limit d) none of the above ____________. a) no effect
28 -
450.
451. 452.
453.
454.
455.
Who should take samples of materials and bring them to the laboratory 458. In what item of work emulsified asphalt and cut back asphalt for acceptance purposes? used? a) Tack Coat a) DPWH Materials Engineer c) Contractor’s Project Engineerc) Seal Coat b) b) Contractor’s Materials Engineer d) DPWH Project Engineer Prime Coat d) Bituminous Surface Course HotLaid How do you determine the diameter of RSB? a) by Vernier Caliper b) by unit weight 459. What is the boundary between Coarse and Fine aggregates used in concreting. a) passing No. 3/8 sieve Cement which has been in storage for so long period that there is c) passing No. 6 sieve b) already doubt as to its quality should be _____________. passing No. 4 sieve d) passing No. 8 sieve a) retested prior to use c) authorized to use b) not to used 460. The purpose of trial section is to check ___________________. a) the suitability of materials In abrasion test, a sample of 5,000 grams was subjected to abrasion,b)athe efficiency of the equipment 2,000 grams sample was retained in no. 12 sieve after washing, what isc) the the construction method proposed to be used abrasion loss? a) 50 d) all of the above c) 60 b) 40 d) 30 461. In FDT, the volume of hole is determined by what? a) Sand to fill hole over unit weight of dry sand Different brand of cement should not be allowed because _____________. b) Total material taken from hole over volume of hole a) different in texture c) varies in strength c) Wet unit weight over 1 + MC/100 b) different in color when dried d) Dry unit weight over MDD x 100 An apparatus used for field density test is called ___________. a) Sand cone c) Nuclear density meter b) Rubber balloon d) all of the above
462.
456.
What is the average compressive strength of the load bearing concrete hollow blocks? a) 1,000 psi c) 600 psi b) 800 psi d) 1,200 psi
Thickness tolerance in the construction of sub- base course is ____________. a) +/- 10 mm. 463.c) +/-The surface condition of tack coat before the next course should 5 mm. b) +/- 20 mm. be applied is _______. a) wet c) d) +/- 15 mm. dry b) sticky d) plastic 457. PH value of water used in concrete is ___________. a) 4 to 6 c) 6 to 10 464. The contractor shall give the Engineer at least _______ days notice b) 6 to 8 d) 3 to 5 prior to the beginning of work at the mill or shop where the metal structure has been manufactured or fabricated, so that the required inspection may be made.
29 -
a) 14 b) 17 465.
466.
467.
468.
469.
c) 21 d) 15
470.
This an equipment which is used to measure differential deflection between joints of a concrete pavement to determine the modulus of the existing slabs for use in the design of an overlay. The request for recoring shall be made by the contractor within _________ a) Dynamic Cone Penetrometer weeks after the official result of the coring test has been released if the b) Falling Weight Deflectometer structure failed to meet strength requirement. c) Benkelman Beam a) one ( 1 ) c) three ( 3 ) d) Merlin Road Roughness Measuring Device b) two ( 2 ) d) four ( 4 ) 471. In the foregoing illustration determine the average thickness of A revised design strength for concrete works was set forth from 14 days PCCP. Position Actual to 7 days for concrete pavement for national roads and _____ days for major Measurement interchanges and busy intersection thus minimizing occurrence of road 1 23.4 congestion. a) seven 2 23.5 (7) c) six ( 6 ) 3 23.6 b) three ( 3 ) d) four ( 4 ) 4 23.6 5 23.4 Compressive strength for mortar samples test at 3 days and 7 seven 6 23.3 days can be considered for acceptance provided the strength of the samples 7 23.3 at 7 days is not less than ________ Mpa which is 85% of the compressive8 23.4 strength for 28 days a) 22.08 9 23.4 c) 23.45 b) a) 23.433 b) 23.43 c) 23.4 d) 24.84 d) 21.53 23.4333 472. Vibrator shall not be operated longer than ______ seconds in any The use of Fly Ash concrete mix as mineral admixture in PCCP and as one location. a) 10 c) 20 ______ % replaces the Portland cement in concrete mix. b) 15 d) 25 a) 15 c) 25 473. How many rotation per second will the crank of a liquid limit b) 20 d)10 device be rotated? a) three ( 3 ) rotations per second This is an instrument used to measure pavement deflections resulting b) two and a half (2 ½ ) rotations per second from vehicle wheel loading. The results of the elastic deformation test are c) two ( 2 ) rotations per second used to evaluate the structural condition of roads, and to help in the design d) one and a half ( 1 ½ ) rotations per second of road strengthening measure and road capacity improvement 474. What is the required size of calibrated sand used for FDT? a) Dynamic Cone Penetrator a) passing sieve No. 30 retained No. 200 b) Falling Weight Deflectometer b) passing sieve No. 20 retained No. 200 c) Three ( 3 ) Meter Straight Edge c) passing sieve No. 10 retained No. 200 d) Benkelman Beam d) None of the above
30 -
475. 476.
477.
478.
479.
480.
481.
482.
483.
When placing concrete, what is the required temperature of concrete? less _____ as called for in the guidelines on the submission of a) less than 29*C c) less than 30*C samples. b) less than 28*C d) less than 31*C a) 5 liters c) 10 liters In PCCP coring, what is the specified thickness of an individual b) 4 liters d) 6 liters measurement that shall not be included in the average? 484. For semi solid materials, samples should be taken at the center of a) less than 20 mm. c) less than 25 mm. the containers at least _____ mm. below the surface and 75 mm. from b) more than 20 mm. d) more than 25 mm. the sides with the aid of a clean hatcher or patty knife. a) 100 __________ is the wearing away of the pavement surface caused by the c) 75 dislodging of aggregate particles. b) 85 d) 50 a) Rutting c) Shoving 485. __________ test classify the different asphalts into types and the b) Raveling d) Corrugation different types into grades. a) Quality test This is the stage in compaction in which all free air is expelled and c) Ductility test replaced by water, if further pressure is applied to the soil mass, the b) Consistency test d) All of the above tendency is to reduce its volume. a) wetting 486. This is the most important volatilization test on liquid asphalt stage c) saturation stage products, its gives information as to the actual amount of b) swelling stage d) none of the above constituents remove at definite temperature. In this stage, additional water replaces some of the entrapped air and a) Extraction test c) Evaporation test the soil particles move closer together with a resulting increase in density. b) Distillation test d) Softening test a) wetting stage c) lubricating stage 487. This test indicate the purity of asphalt. b) swelling stage d) all of the above a) Specific Gravity c) Solubility All boring during soil exploration survey shall generally be carried tob) a Viscosity d) Ductility depth of at least ______ meter below the proposed grade line. 488. This is the most important factor which influence the stability of a) one ( 1 ) c) 0.30 bituminous mixture. a) Gradation of mineral b) two and half ( 2 ½ ) d) 0.50 aggregate What is the factor that will influence the construction of stabilized road? b) Shape and surface texture of aggregate a) Depletion of the supply of economically available materials c) Hardness of aggregate particles b) High cost involved in the construction of the conventional types of road d) All of the above c) If the road structure may be built by stages, and a properly designed 489. road The principal factor that effect the flexibility of bituminous might function briefly as a wearing course mixture is _______. a) the quality of bituminous d) All of the above binder What is the meaning of ASTM? b)the quality of mineral filler a) American Standard for Testing Materials c) temperature susceptibility of the binder b) American Standard for Testing and Materials d) all of the above c) American Society for Testing Materials 490. The application temperature of emulsified asphalt ranges from American Society for Testing and Materials ___________. a) 66* to 107*C In sampling bituminous materials, the composite samples taken from c)a20* to 66*C number of drums should have a size sufficient for testing and should notb)be 10* to 71*C d) 15* to 66*C
31 -
491.
492.
493. 494.
495.
496.
497.
498.
499.
Concrete deposited in water shall be Class “A” concrete with a 500. minimumUnsuitable materials are those materials containing detrimental cement factor of _______ per cubic meter of concrete. quantities of organic materials, such as grass, roots, and sewerage a) 12 bags per cu. m. c) 11 bags per cu. m. and those that is _____________. b) 10 bags per cu. m. d) 9 bags per cu. m. a) high organic soils A tremie shall consist of a tube having a diameter of not less than ______ b) soils with liquid limit exceeding 80 and / or PI > 55 mm. constructed in section s having flanged couplings fitted with gasketc) soils with very low density, 800kg/cu. m. or below with a hopper at the top. a) 200 d) all of the above c) 250 501. The set of cylinders for each project shall be numbered b) 300 d) 150 consecutively beginning with 1 and three specimens should be The fine aggregate used in stone masonry mortar shall all pass No.____ identified as A, B, and C. At the early stage of pouring, the laboratory sieve. a) 40 c) 30 should be requested to break the “A” cylinders at 7 days to check b) 8 d) 3/8 what? a) If the structure should be put in service The coarse aggregate used in Bituminous Concrete is _________. at early stage b) to a) retained on a 2.36 mm. ( No. 8 sieve ) check the mix design b) retained on a 4.75 mm (No. 4 sieve ) c) To check if there is unusual development when admixture is used c) retained on a 19.00 mm. ( No. ¾ sieve ) d) All of the above d) both a and b 502. The field specimen should be cured from 4 to 7 days at the As Materials Engineer, will you permit the use of salvage soil aggregate project under moist conditions obtained by __________. for lie stabilized road mix base course? a) covering with wet sand a) Yes c) It depends b) covering with saw-dust b) No d) Let the DPWH Project Engineer to decide c) covering with palay-strw Is the accredited private testing laboratories owned by companies d) all of the above involved in the supply of construction materials for DPWH project be 503. allowed The cured cylindrical samples shall be transported to the Regional to test their own products? a) Yes Laboratory or any testing laboratory accredited by the DPWH in c) It depends b)________________. No a) on top of d) Either a or c sand For small projects where the quantity of steel bars is less than 10,000 b) carefully packed and crated surrounded with damp sawdust or kgs. What may be required as a basis of acceptance. palay straw c) on boxes with sand a) P.E. Certificate c) Inspection Report surrounding the cylinders b) Mill Certificate d) All of the above d) all of the above Lumber is considered well seasoned when its moisture content504. is The penetration grade of concrete joint sealer, hot poured elastic between _________. a) 10 to 16% c) 10 type to is _________ a) 80 - 100 14% b) 14 to 18%c) 100 - 120 b) d) 15 to 20% below 90 d) 40 – 60 Flushing of bitumen to the surface after belting or screeding the 505. hot The CBR is generally selected at what penetration? mixture denotes rich mixture. a) 5.08 mm. c) 2.54 mm. a) true b) false neither of the two b) 3.1 mm. d) 3.50 mm.
32 -
506.
507.
508.
509.
510.
511.
512.
A soil aggregate that has a CBR value of 20 means that in the condition a) 211*C c) 135*C tested, the resistance to penetration of the standard piston was ______ of b)the 159*C d) 204*C standard resistance of a compacted soil or aggregate. a) 40% c) 10% 514. What is the rate of application of bituminous prime coat using cut b) 20% d) 80% back asphalt? a) 0.5 to 0.7 liters/sq. m. c) For liquid asphaltic materials, these are run on the residue after 1.0 to 1.1 liters/sq. m. distillation. a) consistency test c) to 2.0 liters/sq. m. b) 1.0 d) 1.10 to 2.0 liters/sq.m. ductility test b) quality test d) cement mixing test 515. What is the weight boulders required for class A grouted riprap? The basic aim of compaction is to produce a soil mass that will satisfy a) 10 to 25 kgs c) 15 to 30 kgs. what criteria? a) settlement c) b) 15 to 25 kgs. d) 20 to 30 kgs. permeability b) stability d) all of the above 516. Based on the maximum dry density obtained by laboratory test, When do the embankment become friable in dry weather , ravel at the the degree of compaction required for aggregate subbase should be edges and abrade severely under traffic and will become dusty in service at least _____________. a) 95% and much of the binder soil is simply blown away during the dry season.c) 100% a) the embankment is non- plastic b) 98% d) 90% b) the embankment lacks compaction c) materials fails CBR test 517. Where to determine the amount of mixing water to use when d) none of the above compacting the soil in the field to attain maximum density. When the embankment tends to soften in wet weather, and PCCP a) Trial Section c) Control Strip constructed of such material develop ruts under traffic an d may shift and b) Field Density Test d) Lab. Compaction Test shove to develop a wash board surface, the plasticity index of such material is ____________. a)518. P.I. is too For soil classification purposes as in AASHTO M45, what is not high c) P.I. is too low required? a) combined sieve and b) neither a & b d) both a & b mechanical analysis What is the allowable smooth riding quality of PCCP? b) sieve analysis a) 5.00 mm. c) 3.00 mm. c) the wash test b) 8.00 mm. d) 6.00 mm. d) none of the above What is the penetration grade of bitumen prime coat? a) 60 – 70 c) 85 – 100 b 120 – 150 d) none of the above
519.
This is widely used to control the characteristics of soil which are to be incorporated in roadways. a) The Limit Test c) The Group Index b) The soil classification d) all of the above 513. The spraying application temperature of all grades of asphalt cement should not be more than ________.
33 -
520.
521.
522.
523.
524.
525.
In direct shear test, the soil is sheared to failure by moving one partc) ofBituminous stabilization the soil sample relatively to the other part along a pre-determined plane. d) Lime stabilization When several test are made on a soil under different normal loads and the results are plotted in arithmetic scales, the resulting line is made in the form 526. As per guidelines on submission of samples, laboratory trial mixes of ____________. should be made on aggregates which are proposed tube used for the a) straight line c) parabola first time, in this case what is the weight of fine aggregates to be b) hyperbola d) semi-elliptical submitted for testing? a) 100 kgs. c) 50 kgs. In conducting soil exploration survey, what equipment you will use in b) 70 kgs. d) 80 kgs. obtaining undisturbed samples. a) split spoon sampler c)screw type soil auger sampler 527. The phosphorous content of reinforcing steel bars bigger than 9.0 b) thin-walled sampler d) Post-hole auger sampler mm shall not exceed _______. a) 0.18% b) 0.06% Bituminous stabilization in the process of mixing intimately pulverized c) 0.08% d) 0.05% soil and bituminous material. What is the minimum bearing capacity (soaked CBR ) of the mixture? a) 80% 528. c) The permissible variation of reinforcing steel bars bigger than 9.0 98% b)mm. shall not exceed _____. a) 10% 100% d) 95% b) 5% c) 8% d) 6% Portland cement stabilization roadmix base course is an intimate mixture of pulverized soil, Portland cement and water which is thoroughly 529. A type of cement that sets and hardens by chemical interaction compacted while in a moist condition to form a structural road material with water and is capable of doing so underwater. when the cement hydrates and crystallizes. What is the mass percent wear a) Portland Cement b) Hydraulic Cement of soil aggregate used in this stabilization? c) Air-Retaining Portland Cement d) All of the above a) 40% c) not more than 40% b) 45% d) 50% 530. The spacing center to center of circumferential reinforcement of all pipes shall not exceed its wall thickness and shall in no case For a rich mixture of cement in concrete, what determines the flexural exceed _______________. a) 150 strength of the concrete? a) Mortar strength c) both a &mm. b b) 200 mm. b) the strength of aggregate d) the water/cement ratio c) 100 mm. d) 250 mm. This is a new method of soil stabilization being introduced to improved 531. Oversanded and undersanded concrete mixtures require more the properties of soil which is effective and at the same time cheaper. water in order to be workable but will only result to ______________. a) Stabilization by the use of Geotextiles a) good surface texture b) water tightens b) Cement stabilization c) weak strength d) all of the above
34 -
532.
For every lean mixes or low cement content of the mixture, What 539. What are the common field test? determines the flexural strength of the concrete. Ans. To determine the degree of compaction of soil or it is a control a) The strength of aggregate b) The mortar strength test in embankment construction to ensure adequate compaction c) The water cement ratio d) All of the above 540. What is moisture content? 533. This is a method of determining in-place density of soil that can be used Ans. It is the amount of water present in the soil satisfactorily in moist, cohesive fine grained material only. The sample is obtained by forcing a small thin walled cylinder into the material with 541.a What is the different between natural moisture content with driving head and hammer or other suitable apparatus. Ans.hydroscopic moisture content? Ans. Natural moisture content Drive Cylinder Method is the moisture of undisturbed soil sample while hydroscopic moisture content is the moisture of air-dried soil sample. 534. This method of test is intended to determine the density of cohesive soil and stabilized soil by measuring the weight and volume of undisturbed 542. What is the formula used for moisture content determination? samples. Ans. Block, Chunk orAns. Moisture Content = (wt. Of water/wt. Of oven dried sample) x Core Sampling 100 535.
This method covers the determination of the density in-place of543. Weighing hot sample is not advisable as it affects the accuracy of compacted or firmly bonded soil by using a flexible membrane and liquid result. Ans. True that can be used to measure the volume of a test hole soil with an accuracy within 1.0%. 544. What are the methods use in reducing samples from the field to Ans. By Rubber Balloon Method testing size? Ans. 1) sample splitter 2) quartering 536. This method covers the determination of the total or wet density of soil and soil aggregate in-place by the attenuation of gamma rays, where 545.the What is the required temperature for oven drying the soil sample? gamma detector, or both, remains at or near the surface. Ans. 110*C +/- 5*C Ans. Nuclear Method 546. How can you determine if the soil sample is already oven dried? 537. What are the three major groups of soil? Ans. dried if it reached its constant weight Ans. 1) granular 2) fine grained 3) organic 547. How to prepare or to come up with air-dried soil sample? 538. What are the common laboratory test required for soil? Ans. air dry the sample under the heat of the sun Ans. a) sieve analysis b) plastic and liquid limit test c) compaction test (moisture-density relation) d) CBR e) Abrasion Test (Mass percent of 548. If impossible to air-dry the sample under the heat of the sun what Wear) f) Unit weight g) Moisture Content alternative should be used? Ans. oven dry the sample at 60*C
35 -
549.
Sample for compaction test should pass to what sieve? 559. How many rotation per second will the crank of a liquid limit Ans. method A & B use sample passing sieve #4; method C & D use device be rotated? Ans. 2 rotations per second sample passing #3/4 560. In doing a plastic limit test, to what diameter shall the soil thread 550. What is the difference between T-99 and T-180 compaction test method? began to break? Ans. 3.2 mm. ( 1/8” ) Ans. T-99 uses 2.5kg.(5.5lbs.) rammer with a drop of 12” height, while T180 uses 4.54kg.(10 lbs.) rammer with a drop of 18” height 561. What is the formula for plastic limit? Ans. PL = (Wa – Wb)/Wb x 100 551. What are the particle size analysis? Where: Wa = original wt of crumbled soil thread Ans. It is the determination of particle size distribution in soil by sieve, Wb = wt of oven dried crumbled soil hydrometer, or combined analysis 562. What is Plastic Index (PI)? 552. What are the other terms or particles size analysis? Ans. It is the difference between the liquid limit and the plastic limit; Ans. 1) sieve analysis 2) mechanical analysis 3) grading test/analysis PI = LL-PL 553.
554. 555. 556.
557. 558.
What is the liquid limit? 563. What is specific gravity? Ans. it is the lowest moisture content at which the soil will flow upon the Ans. It is a gravimetric-volumetric relationship in soils (or defined as application of a very small shearing force. the ratio of the wt in air of an equal volume of water at a stated temp.) The liquid limit is expressed as the moisture content corresponding to what number of blows? Ans. 25 blows 564. What is the approximate area for density control strip? Ans. 335 sq. m. What test are used in soil classification? Ans. 1) grading or sieve analysis 2) plastic and liquid limit 565. What is the maximum depth of roadway embankment per horizontal layer in loose measurement? Ans. 200 mm. ( 8” ) What is plastic limit? Ans. It is the minimum moisture content at which the soil can be readily molded without breaking or crumbling 566. What item of work is embankment? Ans. Item 104 What kind of water shall be used in laboratory test especially if it deals with chemicals? Ans. Distilled water 567. What is the kind of material used for item 200? Ans. Aggregate subbase course Liquid limit brass cup with sample is raised allowed to drop sharply on the base through a height of what? 568. What is the required particle size for selected borrow for topping Ans. 10 mm. under item 104 (embankment)?
36 -
569. 570. 571. 572.
573. 574.
Ans. All particle size will pass a sieve 75 mm. or 3” square opening andm. notand an average moisture content of 8.85%? more than 15% will pass 0.075 mm. (No. 20) AASHTO 11 Ans. % Degree of Compaction = (Dry density/Max. dry density) x 100 Where ; Dry density = Wet density/(1+MC/100) Wet density = wt of soil filled in a hole/volume of hole P.I. requirement for item 104 (selected common borrow) is __________. % degree of compaction = {(2,335)/[1+(8.85/100)] x 100}/2,250 Ans. 6 maximum = (2,145.15/2,250) x 100 = 95.34% L.L. requirement for item 104 (selected common borrow) is ____________. Ans. 30 maximum 579. Is the soil for No.45 passed the item 104 requirement for % Ans. G or Grading = 2 What is the LL requirement for item 200 (aggregate subbase course)degree of compaction? P or Plasticity = 2 passing sieve # 40? Ans. 12 maximum C or Compaction = 2 D or Density = three in-site density test/500 sq. m. Coarse portion retained on sieve # 10 (2.00 mm.) of item 200 shall have a mass percent of wear by Los Angeles Abrasion test of _______________. 580. What are the test and number of test needed for 2,960 cu. m. Ans. 50% maximum Aggregate Base Course? Ans. sand cone, jug (at least 4 liters), guide plate, moisture cans, sand, weighing scale, oven with The required CBR value for item 300? temperature control, chisel or digging tools, plastic bags and labeling Ans. 25% minimum (AASHTO T 180 method D) materials (tag number) What is the minimum percent field density or degree of compaction for 581. What is the standard diameter of an orifice in FDT sand cone? item 104 (embankment)? Ans. ½ inch (12.7 mm.) Ans. 95% minimum
582. How many hours does a fine aggregates tested for specific What is the minimum degree of compaction for item 200 and 201? gravity and absorption be soaked in water? Ans. 100% minimum Ans. 15 to 19 hrs. 576. What is the highest point in moisture density curve of the moisture 583. How will you determine if the fine aggregates reaches the density relation test or compaction test of soil represent? saturated surface dry condition? Ans. It is determine by the Ans. MDD(Maximum Dry Density) and OMC (Optimum Moisture Content) use of cone test for surface moisture and if the molded shape of fine aggregate slump slightly it indicates that it has reached a surface-dry 577. What is the required size of calibrated sand used for FDT? Ans. Any clean, dry, free-flowing uncemented sand passing # 10 and condition. retained # 200 sieves 584. What are the test required for concrete aggregates? Ans. 1) Fine Agg: Grading, specific gravity, absorption, dry unit wt. 578. What is the degree of compaction of soil having a maximum dry density 2) Coarse Agg: grading, specific gravity, absorption, dry unit wt, and 2,250kg/cu. m. and wet density of soil from hole equivalent to 2,335kg/cu. 575.
37 -
abrasion request
Note: soundness is also tested as 594. per
What do you call a sample for concrete pavement? Ans. Concrete beam sample
585.
What is the maximum mass % of wear by Los Angeles Abrasion595. Test? How many sample should be taken for every 75 cu, m. of fresh Ans. 40% maximum concrete? Ans. 3 pcs. sample or 1 set sample 586. What is the required speed of Los Angeles Abrasion Machine per minute? Ans. 30 to 33 rpm 596. What do you call the sample for structural concrete? Ans. Concrete cylinder sample 587. What is the size or diameter and weight of cast-iron spheres use in abrasion? Ans. Approximately 46.8 mm 597. dia. and What is the test use to determine the consistency of concrete? weighing between 390-455 grams Ans. Slump test 588.
What is the required total wt. of sample for abrasion test of coarse 598. How to compute for the slump of concrete? aggregate grading A with 12 number of sphere? Ans. Slump = Ht. Of slump cone – ht. Of fresh concrete after Ans. 5,000 grams +/- 25 grams subsidence
589.
What is the significance of abrasion test? 599. How to compute for the compressive strength of concrete Ans. It evaluate the structural strength of coarse aggregates cylinder sample? Ans. CS = P/A where: P - gives an indication of quality as determined by resistance to impact and = loads, lbs. A = area, sq. m. wear - it determines whether the aggregate will A = [rD(sq)] / 4 = 28.27 sq. m have degradation during traffic or rolling 600. At what age should a concrete beam sample be tested for flexural 590. Quality test for cement is represented by how many bags of cement? test? Ans. 4 days Ans. 2,000 bags or fraction thereof 601. How to compute the flexural strength for third point loading test? 591. What is the sieve use in sieving materials from Abrasion Machine? Ans. R = (PL)/(bxdxd) = P(18”)/(6” x 6” x 6”) = P/12 Ans. Sieve # 12 (1.70 mm.) where: R = modulus of rupture P = Load in lbs. or tons 592. Testing machine should be calibrated once every six (6) months if L = span length in inches b = base in inches possible but if it not possible what is the required time should the machine d = depth in inches be calibrated? Ans. Once a year 593.
602. What is the minimum flexural strength for third point loading What is the percent tolerance of error in calibrating the machine? test? Ans. 3.8 Mpa (550 psi) Ans. +/- 1%
38 -
603.
What is the minimum flexural strength for center point loading613. test? What is the required sample for paint? Ans. 4.5 Mpa (650 psi) Ans. 1 can ( gal. or pail )/100 cans (gal. or pail )
604.
How to compute for flexural strength at center point loading? 614. What kind of paint had reflectance in the form of beads? Ans. R = (3PL)/(bxdxd) = 3P(18)/2x9x6x6 Ans. Reflectorized Traffic Paint
605.
Which part of the batch for fresh concrete should the sample be 615. taken What is the common components of house paint? from a stationary mixers, revolving drum truck mixers or agitators? Ans. pigment and vehicle Ans. two or more regular intervals during discharge of middle portion of the batch 616. What is this construction material that is dark brown to black cementatious material in which the predominating constituent are What is the size of tamping rod use in sampling concrete? bitumen? Ans. 16 mm. (5/8 inches) diameter and 610 mm. (24 inches) long with the Ans. Asphalt tamping end rounded to a hemispherical tip of the same dia. as the rod 617. What asphalt is commonly called hot asphalt? Concrete Masonry (hollow blocks) if subject to test, how many sample Ans. is Asphalt cement required? Ans. 6 pcs./10,000 units 12 pcs. if more than 10,000 units 618. What are liquid asphalt? Ans. Cut-back asphalt and Emulsified Asphalt What is the strength requirement for load bearing concrete masonry units? Ans. individual = 5.5 Mpa (800619. psi) What is the use of blown asphalt or hard asphalt? minimum Ans. Use as joint filler or water proofing Average(for 3 samples) = 4.14 Mpa (600 psi) minimum 620. SS-1 or SS-1h is what kind of asphalt? What is the significance of testing reinforcing steel bars? Ans. Slow Setting Emulsified Asphalt Ans. to determine the yield and tensile strength of the bar as well as its elongation and is used to classify the bars into grade 621. What are the three (3) kinds of Emulsified Asphalt? Ans. Rapid Setting, Medium Setting and Slow Setting What is the required length of RSB for testing? Ans. 1 meter/10,000 kgs./size/shipment 622. What asphalt contains water? Ans. Emulsified Asphalt What is the significance of bending test for RSB? Ans. to evaluate the ductile properties of RSB 623. What is the penetration grade for blown asphalt? Ans. 0 to 30 What is the required size of test specimen for G.I. sheets? Ans. 60 mm. x 60 mm. ( 3pcs. from one sheet/100 sheets
606.
607.
608.
609.
610. 611. 612.
39 -
624.
What is the ideal penetration grade of asphalt use in Tropical Region? 635. One set (3 pcs ) concrete cylinder sample shall be taken for every Ans. 85 to 100 (but some uses 60 to 70) how many pieces of RCP? Ans. 25 pcs.
625.
Tack coat is used in an existing bituminous or concrete pavement. 636. In submitting samples for testing, what particular form is being Ans. True accomplished? Ans. sample card
626.
What is the rate of application of bituminous tack coat? Ans. 0.2 to 0.7 liter/ sq. m.
627.
What is the rate of application of bituminous prime coat? Ans. 1 to 2 liters/sq.m.
628.
637.
as a Materials Engineer of the project what is the report accomplished every week? Ans. Quality Control Assurance Report
638.
What do you call the report to be submitted at end of the month? Ans. Monthly Materials Report
For how many hours or how long shall a bituminous prime coat left undisturbed? Ans. 24 hrs. 639.
629.
What kind of asphalt is used as prime coat? Ans. Cut-back asphalt (medium curing or rapid curing)
630.
Bituminous prime coat is use to treat surface of base course. Ans. True
640.
How to determine the proportion of cement , water, fine aggregates and coarse aggregates? Ans. by means of Concrete Design Mix How to determine the thickness of pavement? Ans. by means of concrete core
641. How to determine the asphalt content of bituminous mix? Ans. No tack coat or prime coat shall be applied when the weather is foggy or by means of extraction test rainy. Ans. True 642. In an extraction test, aside from the asphalt what other materials being extracted? Ans. Aggregates or composite 632. What kind of asphalt is used as tack coat? aggregates ( minerals of fine & coarse aggregates) Ans. cut-back asphalt (rapid curing) or emulsified asphalt 631.
633.
643. What is being determined in a core sample from asphalt Where should the bituminous seal coat be used? pavement/ Ans. thickness of Ans. on an existing bituminous surface course with or without an application pavement and density of pavement of aggregates
634.
644. testAll records regarding quality control such as accomplishment, If concrete cylinder sample for RCP is not available for compression daily activities, weather etc. are recorded in a ________. one (1) whole piece RCP for every 50 pcs. RCP will be submitted for quality Ans. Materials Log Book test. Ans. True
40 -
645. 646.
647. 648.
649.
650.
The standard penetration test (SPT) is an in-site test that measures 654. Where do we take additional cores when the measurement of any what? Ans. depth of soil layer core taken from the pavement is deficient in thickness by more than 25 mm? Ans. Which of the following bituminous material is best recommended forAt no less than 5 meters intervals parallel to the centerline in each direction from the affected location sealing weakened plane joints? Ans. Joint Filler Asphalt (commonly called hard asphalt) 655. The results of Immersion-Compression test conducted on an asphalt mix sample are as follows: Dry stability = 2,000 Kpa The main problem associated with wrong practice of conveying concrete Wet stability = 1,000 Kpa is called ______. Ans. Segregation What is the resulting index of retained strength? Does it meet the specification requirement of item 310 Bituminous Concrete Course? The specification call for 1:2:3 concrete mix. In one bagger mixer, which Ans. Index of Retained strength = (Wet stability/Dry stability) x 100 of the following amount of water is most likely required for the mix? = (1,000 Kpa/2,000 Kpa) x 100 Ans. 20 i\liters = 50% A one lane road, with a pavement width of 3.5 meters and shoulder No it does not meet the specification of item 310 since the width of 0.5 meter on each side of the pavement, was designed to havespecification of IRS is 70% minimum while the resulting IRS is only subbase and base courses with a combined thickness of 300 mm. If the 50% thickness of the subbase is a 125 mm. the spreading and compaction of the 656. Quality Control testing in a DPWH project is the responsibility of subbase and base course shall be carried out in ______. the ___________. Ans. DPWH and Contractor’s Ans. 3 layer over the full width of 4.5 m. Materials Engineers as Material Engineer, what is the area of trial section that you would recommend to check the suitability of the materials and efficiency657. of the As Material Engineer, when is the right time to start sampling and testing aggregates of the course materials? equipment to be used for item 310, Bituminous Concrete Surface course? Ans. before the course materials be incorporated in the project Ans. about 500 sq. m.
658.is The spot test on asphalt is used to determine what? Per program of work, the estimated volume of item 201 materials Ans. overheating during manufacture 7,500 cu. m. How many grading and plasticity test are required based on the DPWH minimum testing requirements? Ans. 25 grading and 25 659. Under what climatic condition(s) do we use the lower penetration plasticity grades or hard asphalt? Ans. hot climate 652. Bituminous concrete mixes contain asphalt by weight equivalent to 660. Sampling of the freshly mixed concrete should be taken on the what? Ans. 5 to 8% _______ batch discharge of the transit mixer. 653. Quality of factory-produced reinforced concrete pipes may be best Ans. middle established through what? Ans. Test of concrete pipe samples 651.
41 -
661.
662.
663. 664.
665.
666. 667.
Soft and unstable soils were encountered during the course of 670. subgradesample from compacted bituminous mix shall be neatly cut by preparation. If you were the Materials Engineer assigned to the project, saw whator core drill. Each sample shall be at least ____________. is the most effective and cheaper method that you would recommend toAns. 150 mm. x 150 mm. or 100mm diameter full depth stabilized the soil prior to the construction of the subbase course? Ans. Geotextiles 671. For surface tolerance the surface (bituminous mix) will be check by the use of a _____ at sites selected by the Engineer. How many times per layer should a concrete specimen molded in a Ans. 3 meter straight edge 6”x6”x21” beam mold be rodded? Ans. 63 times 672. What is the sample requirement for paving concrete for every 75 cu. m. or fraction thereof? Ans. One (1) set (consisting of 3 What is the basis for acceptance or rejection of any construction pcs.) concrete beam sample materials? Ans. Materials Test Report 673. In testing bituminous mix sample for Immersion-Compression In testing concrete cylinder sample the load applied should be Stability the sample is soaked in water bath for ______ days. continuous without shock at a constant rate within the range of _______ Ans. per four (4) second. Ans. 0.14 to 0.34 Mpa per second or 20 to 50 psi per second 674. Given: Wt. of dry aggregate = 950 grams Wt. of asphalt = 50 grams During the application of the first half of the anticipated load a _______ What is the total % of asphalt weight of total mix rate of loading shall be permitted. Ans. Wt. of total mix = wt. of dry agg. + wt. of asphalt Ans. higher rate = 950 + 50 = 1,000 grams therefore: (50grams/1,000grams) x 100 = 5% Initial rolling in bituminous mixes shall be perform with a _____ roller. Ans. Pneumatic Tire Roller 675. Does the percent asphalt in problem above meet the required specification for percent asphalt in bituminous mixes? Why? Ans. yes, because standard specification for percent asphalt in Final rolling in bituminous mixes shall be perform with a _________ roller. bituminous mixes is 5 to 8% Ans. 3-wheel or Tandem type steel wheel roller
676. If the actual percent asphalt in the problem above is 5% and the Rolling of bituminous mix shall be discounted whenever it begins to percent asphalt in a job-mix 5.6% did it pass the required tolerance? produce excessive ______ or ________. Why? Ans. No, Ans. pulverizing of the aggregate or displacement of the mixture because the required tolerance for % asphalt in a job-mix formula is 669. Final rolling shall be continued until roller marks are eliminated and +/-0.4% a minimum of _____ mass percent of the density of the laboratory compacted 677. Which is not the duty or responsibility of Materials Engineer? specimens prepared in accordance with AASHTO T160 has been obtained. Ans. quantity of construction materials Ans. 95 mass percent 668.
42 -
678.
Which is the duty or responsibility of a Materials engineer? Ans. quality of construction materials
679.
Problem regarding quality of construction materials shall be reported 688. How can we establish the exact percentage to be used in the directly by the contractor’s Materials Engineer to the __________. bituminous mixture? Ans. Job-mix formula Ans. DPWH Materials Engineer 689. What are the two types of bitumen that are commonly used in How many concrete cylinder is required for a 3,000 pcs. reinforced bituminous concrete surface course? concrete pipe culvert? Ans. 120 sets (consisting of 3 pcs. concrete Ans. 1) Tar- is viscous liquid obtained from distillation of coal or cylinder per set) wood 2) Petroleum Asphalt – are the product of the distillation of crude oil If the concrete cylinder is not available for a 3,000 pcs. culvert pipes, how many pipes shall be subjected to test? 690. What are the three major petroleum asphalt product? Ans. 60 pcs. culvert pipes Ans. 1) Asphalt cement – produced in various viscosity grade, the most common penetration grade are, 200/300, 120/150, 85/100, 40/50 2) What kind of test that requires calibrated sand in filling the hole in order Cut-back asphalt – are asphalt mixed with solvents to reduce their to determine the volume of hole? viscosity 3) Emulsified Asphalt – are mixture of Ans. Field Density Test (FDT) asphalt cement and water with emulsifying agent What do you call the test using a rammer and a mold? 691. What are the solvents for cut back asphalt? Ans. Moisture Density Relation Test or Compaction Test Ans. 1) gasoline – for rapid curing type 2) kerosene – for medium curing type What kind of asphalt has a penetration grade of 0 to 30 mm.? 3) diesel fuel – for slow curing type Ans. Blown Asphalt
680.
681.
682.
683. 684.
687.
What is the percent weight of asphalt in the bituminous mixture? Ans. 5 to 8%
692. Emulsified asphalt are either _____ and _________. If there is a necessary to add water to the concrete mix in order to Ans. 1) cationic emulsion – which work better with wet agg. And in increase is workability (provided concrete does not exceed specified slump). cold weather 2) anionic emulsion – which How many minutes after the initial of the mixing does adding of water be adhere better to agg. Which have positive charges permitted? Ans. not exceeding 45 minutes and that water cement ratio is not exceeded 693. What is the bituminous material commonly used in item 310? Ans. Asphalt cement (AC) 686. What is the percent weight of aggregates (coarse, fine and mineral filler) in the mixture of bituminous concrete surface coarse? 694. What greatly influence the service of an asphalt pavement? Ans. 92 to 95% Ans. grade and quantity of asphalt 685.
43 -
695.
What influence primarily the grade of asphalt selected? Ans. Climatic condition
696.
The lower penetration grade or hard asphalt is used in ____________. 705. What is the most commonly used method in the design and Ans. hot climate evaluation of bituminous concrete mixes? Ans. Marshall Stability Method The higher penetration grade or softer asphalt is used in____________. Ans. cold climate 706. The quality control test for asphalt mix are the following: Ans. 1) Immersion-Compression Test – determines the index of retained How many weeks does a producer of asphalt mix or the contractor shall strength of the mix 2) Extraction submit the job-mix formula? and Grading Test – determines the asphalt content and particles size Ans. three (3) weeks prior to production distribution of coarse and fine aggregates 3) Laboratory density test – determines the degree of compaction Who will approved the job –mix formula? Ans. DPWH Project Engineer and Materials Engineer 707. What is the correct temperature that the mixture shall be placed as measured in the truck just prior to dumping into the spreader? The job-mix formula contains provisions on the following: Ans. 107*C Ans. 1) grading 2) percentage and type of asphalt 3) temp. of agg. and asphalt 4) temp. of mixture upon delivery or at time of 708. When tar is used, what is the temperature that the mixture shall compaction be placed? Ans. 66*C to 107*C What is the primary quality control mechanism for the production of 709. When shall the compaction be done in order to attain the asphalt mixture? Ans. Job-mix formula which shall conform required density? Ans. when the mixture is to the following ranges of tolerance: Passing No. 4 and still hot and workable larger sieves +/- 7% Passing No. 8 to No. 100 sieves +/- 4% Passing No. 200 +/- 2% 710. How to determine the number of passes that would attain the Bituminous Materials +/- 0.4% required density? Ans. trial section Temperature of mixture +/- 10*C 711. What control during the mixing and compaction is of great What is the minimum dry compressive strength of the mixture? significance in the strength of the resulting pavement? Ans. 1.4 Mpa (200 psi) Ans. temperature
697. 698.
699. 700.
701.
702. 703.
704.
What is the Index of Retained Strength of the mixture? Ans. 70%
The mixture shall have a mass percent air voids with the range712. of What kind of roller should be used for the initial or breakdown _________. Ans. 3.0% - 5% compaction? Ans. Pneumatic smooth wheeled roller (not less than 10 tons)
44 -
713.
What is the speed of the roller? Ans. 5 km/hr
714.
How is the rolling be done? Ans. It should begin from the side and proceed longitudinally parallel 725. What is the compressive strength of the PCCP when rested at 14 toward the road centerline, each trip overlapping one half the rollers width days? Ans. 24.1 Mpa (3500 psi)
715.
After the final rolling what should be checked? Ans. degree of compaction
716.
The compacted pavement shall have a density equal to or greater 727.than What kind of form used in item 311? ___________. Ans. 97% of the laboratory compacted density Ans. steel forms and a depth equal to the thickness of the pavement
717.
When is the traffic be permitted to enter the pavement? 728. How long shall the forms remain undisturbed after concrete Ans. when the pavement has cooled to atmospheric temperature pouring? Ans. 24 hrs.
718.
How many samples shall be taken for each full days operation?729. What is the difference between item 504 and item 505? Ans. at least one but not more than three (3) core samples Ans. placement of stone or boulders and the ratio of cement and fine sand What is the dimension of the samples taken full depth from the finish pavement for thickness determination? 730. What is the ratio of fine aggregates to number of bags of cement Ans. 150 mm. or 100 mm diameter for grout in item 504 and 505? Ans. for item 504 its one part cement to three part fine sand (1:3) for item 505 its one part cement to two parts fine sand (1:2) How is the sample taken from the finished pavement? Ans. by means of core drill or saw 731. Penetration and ductility test of asphalt are done in __________ temperature. a) 60*C How is the surface level of the finished pavement being check? b) 25*C Ans. by the use of 3 meters straight edge c) 50*C d) 10*C The variation of the surface from the testing edge of the straight 732. This is the most fluidest and lightest of all the grade of Medium between contacts with the surface shall not exceed ________.. Curing Cut-back Asphalt. a) MC – 30 b) MC Ans. 6 mm. – 70 c) MC – 800 d) MC – 300 What determine the thickness and density of compacted asphalt pavement? Ans. core test
719.
720. 721. 722.
723.
724.
726.
45 -
What is the strength requirement (flexural strength) of a concrete when tested by third point loading method? Ans. 3.8 Mpa (550 psi)
What is the slump of a workable concrete if not vibrated? Ans. 40 – 75 mm, when vibrated the slump is 10 to 40 mm
733.
The only kind of asphalt that can be used in all bituminous item741. of work.Tie bars shall not be coated or painted with ____________. a) Asphalt Cement b) Cut-back Asphalt Ans. asphalt or other materials c) Emulsified Asphalt d) All of the above 742. What is the metal device that are used as a load transfer device 734. Retempering of concrete or mortar, which has partially hardened, will held be in a position parallel to the surface and centerline of the slab of permitted with the addition of cement, aggregate or water. pavement? a) yes b) no Ans. dowels c) it depends on the condition of concrete d) check the slump 743. To protect dowel from corrosion and to facilitate sliding in 735. What is the minimum number of representative cores that shall be taken concrete, it shall be coated with _________. from each member area of concrete in place that is considered deficient? Ans. thin film of bitumen a) 3 cores b) 4 cores c) 5 cores d) core must be taken at 5 meter interval 744. The surface of the pavement shall be roughened by means of backward & forward of the designed sta. ____________. Ans. brooming 736.
the strength level of concrete will be considered satisfactory if 745. the What is the depth of corrugation produce by brooming in the average of all sets of three consecutive strength test result equal or exceed surface of the pavement? Ans. 1.5 mm. the specified strength and no individual strength test result is deficient by more than how many percent? a) 25% The surface of the newly placed concrete when it is sufficiently 746. b) 20% c) 15% set shall be cured for a period of _________. d) 10% Ans. 72 hrs.
737.
747. For major interchanges and busy intersection, PCCP will be allowed open on the ----------- to minimize occurrence of road congestion. a) 14th day b) 10th day th c) 12 day d) 7th day
738.
The width of the weaken plane joint is __________. Ans. not more than 6 mm.
739.
748.
When is the right time to saw the weaken plane joint? Ans. within 24 hrs. as soon as concrete has hardened sufficiently
to The curing of the pavement are done on the following: Ans. 1) by covering the concrete with mats saturated with water 2) thoroughly wetting the pavement 3) by ponding 4) by applying curing compound after finishing of the surface When the right time is the joint be sealed? Ans. after the curing period or before it is opened to traffic
749. What is item 504 in DPWH specification? Ans. 740. What shall be done if cracks appear at or near the joint prior to the time Grouted Riprap of sawing? Ans. sawing shall be omitted
46 -
750.
What is item 505 in DPWH specifications? Ans. Stone Masonry
15 days c) 21 days
751.
This is the empirical indicator of the clay fraction of a binder material in a stabilized soil mixture. a) Group Index b) Liquid Limit c) Plasticity Index d) Plastic Limit
752.
When water is added to the mixture to bring the slump within required limit, it shall be injected into the mixer under such pressure and direction of flow that the requirement for uniformity and desired slump of concrete are met. The drum shall be turned on additional _______ revolution or more. a) 10 revolutions b) 45 revolutions c) 30 revolutions d) 15 revolutions
753.
Job-mix formula submitted for approval shall propose definite single values for, except _____. a) % of aggregate passing each specified sieve b) temperature of the mixture delivered on the road c) Percent of bituminous materials to be added d) mixing time of the mixture in the batching plant
754.
For small contract project of the DPWH located in remote areas where the quality of cement to be used is too small and where there are no accessible testing laboratory to check the quality of materials, exception in the requirements for performance of laboratory test in cement prior to use may be allowed provided that the trial mixes be done for every ___________. a) deformation characteristic of soil b) Engineering properties of the underlying soils c) Arrangement of soil strata d) Field Density of soil
755.
How many days shall the Engineer be notified in advance of the date that the treating process will be performed in order that the untreated lumber, the treatment process and the finished treatment timber may all be inspected? a)
47 -
b) 10 days d) 7 days
