Minimum Qualification: Registered and licensed CivilEngineer Requirements: a) Duly accomplished application form thatcan be secured from any DPWHRegional Officeb) Xeroxed copy of valid PRC IDc) Two (2) pieces of 2”x 2” photographs Where to File: The requirements must be submitted to theAccreditation Committee, thru the Chief of Materials Quality Control and HydrologyDivision of any DPWH Regional Office. Date and Place of Examination: The examination shall be held on every 2nd Saturday of March and September andconducted simultaneously in Manila, BaguioCity, Cebu City and Davao City. Result of Examination: The report of rating shall be releasedafter 1-month from the date of theaccreditation examination. Department Order: A Department Order shall be issuedexaminees who passed theaccreditation examination. Certificates and IDs of Accreditation: The certificates and IDs of accreditation shallbe issued to applicants who meet theaccreditation criteria upon approval of theDepartment Order. Renewal of Certificate of Accreditation: The certificate of accreditation shall berenewed after three (3) years from the date itwas issued upon request of the concernedmaterials engineer. Reinstatement of Accreditation: The accreditation shall be reinstated uponrequest of the concerned materials engineer,supported with a certification on separationfrom government service signed by the headof office or administrative officer of hisprevious employer.
205.The service performance of an asphalt pavement is greatly influenced b y:a . g r a d e o f a s p h a l t b . q u a n t i t y o f a s p h a l t c . a a n d b d . n o n e o f t h e a b o v e 206.In bituminous mixture, aggregates account for 9 2 % t o 9 5 % o f t h e w e i g h t o f t h e m i x t u r e , w h i l e asphalt ( the binder of the aggregates ) accounts for ---------------a . 3 – 5 % b. 5–8% NOTE: The proportion of bituminous material on the basis of totalc.5 – 10 % dry aggregate, shall be from 5.0 to 8.0 mass percent.d . 7 – 1 0 % 207.In asphalt pavement, prior to acceptance, a sample of full
d e p t h , 1 5 0 m m x 1 5 0 m m o r 1 0 0 m m diameter shall be taken by a saw or core drill for -------- testa . t h i c k n e s s d e t e r m i n a t i o n b . d e n s i t y c . s t a b i l i t y d . a a n d b 208.In an asphalt pavement construction, after spreading bituminous mix, compaction will followwhere rolling shall begin at the sides and proceed l o n g i t u d i n a l l y p a r a l l e l t o w a r d t h e r o a d centerline, each trip overlapping ------- of the roller width, gradually progressing to the crown of the road a.½ b . 1 c . 1 ½ d . 2 . 0 209.The control of temperature during the mixing and compaction is of great significance in t h e - - - - of the resulting pavementa . s t r e n g t h b . s k i d r e s i s t a n c e c . f l e x i b i l i t y d.all of the above 210.based on the minimum testing requirements for Item 309, Bituminous P l a n t M i x , G e n e r a l , o n e quality test for asphaltic material requires for every ------ tonnes or fraction thereof. a . 4 0 b . 5 0 c . 6 0 d . 7 0 211.The test in emulsified asphalt which determines the resistance of the emulsion to break w h e n mixed with mineral aggregatesa . s o l u b i l i t y b . s i e v e t e s t c.cement mixing d.storage stability
212.What Item in the DPWH standards and specification is Bituminous Tac k C o a t ? a . 3 0 1 b . 3 0 2 c . 3 0 3 d . 3 0 4 213.In identif ying project location intended f o r a s p h a l t p a v e m e n t , w h i c h o f t h e f o l l o w i n g c r i t e r i a i s not appropriate to recommend?a . d r a i n a g e f a c i l i t i e s i s w e l l - m a i n t a i n e d b . l o c a t i o n i s n o t a typhoon belt areac . e x i s t i n g b a s e c o u r s e i s s t a b l e d.flood-prone section 214.An asphalt cement can be a good bituminous binder material for Item:a . 3 0 1 b . 3 0 2 c . 3 0 8 d . 3 1 0 215.Which of the following bituminous material is best recommended for s e a l i n g w e a k e n e d p l a n e and construction joints of the PCCP.a . a s p h a l t c e m e n t b . e m u l s i f i e d a s p h a l t c . c u t b a c k asphalt d.joint filler asphalt 216.The primary quality control mechanism for the production of asphalt m i x t u r e s w h i c h w i l l h a v e a high degree of uniformity that will satisfy job requirements is called:a . m a r s h a l l s t a b i l i t y t e s t b.job mix formula
c.immersion – compression stability testd . a a n d b 217.When a completed asphalt pavement e x h i b i t s t o o m u c h v o i d s , i t i s u s u a l l y c a u s e d b y t h e following except of:a . r o l l i n g t h e m i x t u r e b e l o w t h e t e m p e r a t u r e r e q u i r e m e n t s b . t o o much coarse aggregatesc . t o o l i t t l e b i n d e r d.too much fine aggregates 2 1 8 . Tes t r e s u l t s f r o m s p e c i m e n t a k e n f r o m a r e c e n t l y r o l l e d a s p h a l t p a v e m e n t s h o w e d t h a t i t s t o t a l asphalt content is 5.45 % by weight of mix. If the asphalt absorbed by the aggregate is 0.95 %,the effective asphalt content by weight of mix is:a . 4 . 8 % P b a b. 4.552 % NOTE: Pbe = ----- x Psc . 5 . 1 0 % 1 0 0 d . 5 . 5 0 % Where: Pbe = effective asphalt content, percent by total weight of mixturePba = absorbed asphalt, percent by weight of aggregatePb = asphalt content, percent by total weight of mixturePs = aggregate content, perce nt by total weight of mixture2 1 9 . A n a s p h a l t m i x p r e p a r e d i n t h e l a b o r a t o r y u s e d 3 0 % , 5 0 % , 2 0 % b y w e i g h t o f c o a r s e a g g r e g a t e (CA), fine aggregate (FA) and mineral filler (MF), respectively. If the specific gravity of CA,
FA, a n d M F a r e 2 . 5 0 , 2 . 6 5 a n d 2 . 5 0 , r e s p e c t i v e l y, t h e o v e r a l l s p e c i f i c g r a v i t y o f c o m p o s i t e aggregates is:a. 2.58 30 + 50 + 20 b . 2 . 4 5 S G o a = - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - c . 2 . 6 6 3 0 / 2 . 5 + 5 0 / 2 . 6 5 + 2 0 / 2 . 5 d . 2 . 7 7 220.If 95 % of the aggregates in question no. 45 is mixed with 5 % asphalt by weight of mix, t h e specific gravity of the mix (if it is voidless) is: specific gravity of asphalt is 1.01.a . 2 . 4 5 b . 2 . 2 3 1 0 0 c. 2.39 Gmm = Gmb = -------------------------d . 2 . 1 8 ( voidless) 95/2.58 + 5/1.012 2 1 . I f t h e b i t u m i n o u s m i x i n N o . 4 6 h a s a 5 % a i r v o i d s , t h e b u l k s p e c i f i c g r a v i t y ( G m b ) c a n b e computed as:a. 2.51 Gmm Gmb b . 2 . 2 7 % A i r Voi d s = - - - - - - - - - - - - - - - - - x 1 0 0 c . 2 . 3 9 G m m d. 2.412.39 - Gmb5/100 = ------------------2.392 2 2 . I f t h e d r y s t a b i l i t y o f a b i t u m i n o u s m i x i s 3 , 9 5 0 l b s . An d i t s w e t s t a b i l i t y i s 2 , 8 3 0 l b s . , t h e I n d e x of Retained Strength (IRS) is:a . 5 0 . 2 0 % b. 71.60 % Wet Stabilityc . 7 3 . 2 0 % I R S = - - - - - - - - - - - - - - - - - x 1 0 0 d . 6 1 . 1 0 % D r y S t a b i l i t y 2 2
3 . T h e v o i d s i n t h e m i n e r a l a g g r e g a t e ( V M A ) i s : a.the sum of the air voids and the volume of the mix b.the difference between the volume of the mix and the volume of aggregate c . t h e s u m o f t h e a i r v o i d s a n d v o l u m e o f a g g r e g a t e d.the difference between the volume of mix and volume of asphalt 2 2 4 . T h e d i s t a n c e t r a v e l l e d b y a standard penetration needle on a prepared sample of asphalt cementu n d e r c o n d i t i o n f o r n o r m a l p e n e t r a t i o n i s 9 . 0 m m ( t h e p e n e t r a t i o n s c a l e h a s 1 / 1 0 m m calibration). Asphalt cement is classified as --------penetration grade.a . 6 0 – 7 0 b . 8 5 – 1 0 0 c . 1 2 0 – 1 5 0 d . 2 0 0 - 3 0 0
Materials Engineer 1.In soil Engineering the term “SOIL” includesa . c l a y b . g r a v e l c . s a n d d.all of the preceding
