8814. The troposphere is the: A – part of the atmosphere above the stratosphere B – part of the atmosphere below the tropopause C – boundary between the mesosphere and thermosphere D – boundary between the stratosphere and the mesosphere Ref: all Ans: B 8817. What is the boundary layer between troposphere and stratosphere called: A – Tropopause B – Ionosphere C – Stratosphere D – Atmosphere Ref: all Ans: A 8824. The amount of water vapour which air can hold largely depends on: A – relative humidity B – air temperature C – stability of air D – dew point Ref: all Ans: B 8876. The tropopause is a level at which: A – vertical currents are strongest B – water vapour content is greatest C – pressure remains constant D – temperature ceases to fall with increasing height Ref: all Ans: D 8889. The tropopause is lower; A – south of the equator than north of it B – in summer than winter in moderate latitudes C – over the North pole than over the equator D – over the equator than over the South Pole Ref: all Ans: C 10050. What is the approximate composition of the dry air by volume in the troposphere? A – 21% oxygen, 78% nitrogen, and the rest other gases
B – 10% oxygen, 89% nitrogen, and the rest other gases C – 88% oxygen, 9% nitrogen, and the rest other gases D – 50% oxygen, 40$ nitrogen and the rest other gases Ref: all Ans: A 10055. In which layer is most of the atmospheric humidity concentrated? A – Troposphere B – Tropopause C – Stratosphere D – Stratopause Ref: all Ans: A 10061. The thickness of the troposphere varies with: A – latitude B – longitude C – rotation of the earth D – the wind Ref: all Ans: A 10102. Going from the equator to the north pole, the altitude of the tropopause: A – increases and its temperature increases B – decreases and its temperature increases C – increases and its temperature decreases D – decreases and its temperature decreases Ref: all Ans: B 10753. In the mid-latitudes the stratosphere extends on an average from: A – 85 to more than 200 km B – 0 to 11 km C – 50 to 85 km D – 11 to 50 km Ref: all Ans: D 10804. Which layer of the atmosphere contains more than 90 per cent of all water vapour? A – Troposphere B – Lower stratosphere C – Upper stratosphere
D – Ionosphere Ref: all Ans: A 10825. Which one of the following statement applies to the tropopause? A – It is, by definition, a temperature inversion B – It is, by definition, an isothermal layer C – It indicates a strong temperature lapse rate D – It separates the troposphere from the stratosphere Ref: all Ans: D 10846. The average height of the tropopause at 50oN is about: A – 14 km B – 8 km C – 11 km D – 16 km Ref: all Ans: C 10851. The troposphere: A – has a greater vertical extent above the equator than above the poles B – contains all oxygen of the stratosphere C – is the separation layer between the stratosphere and atmosphere D – reaches the same height at all latitudes Ref: all Ans: A 10855. How does the height of the tropopause normally vary with latitude in the northern hemisphere? A – It remains constant throughout the year B – It remains constant from north to south C – It increases from south to north D – It decreases from south to north Ref: all Ans: D 10896. What, approximately, is the average height of the tropopause over the equator? A – 40 km B – 8 km C – 11km D – 16 km
Ref: all Ans: D 15783. Why are indications about the height of the tropopause not essential for flight documentation in the tropics? A – The tropopause is generally well above the flight level actually flown B – The meteorological services are unable to provide such a chart C – The temperatures of the tropical tropopause are always very cold and therefore not important D – Tropopause information are of no value Ref: all Ans: A 15790. What is the most likely temperature at the tropical tropopause? A – -25oC B – -75oC C – -55oC D – -35oC Ref: all Ans: B 15820. Half the mass of the atmosphere is found in the first: A – 5 km B – 3 km C – 8 km D – 11 km Ref: all Ans: A 15849. What of the following is the most important constituent in the atmosphere from a weather stand point? A – Hydrogen B – Water vapour C – Nitrogen D – Oxygen Ref: all Ans: B 15850. The height and the temperature of the tropopause are respectively in the order of:
A – 16 km and -40oC over the poles B – 16 km and -75oC over the equator C – 8 km and -40oC over the equator D – 8 km and -75oC over the poles Ref: all Ans: B 16572. The troposphere is: A – deepest over the equator B – deepest over the poles C – the same depth all over the earth D – shallowest over the poles in summer Ref: all Ans: A 24289. In relation to the total weight of the atmosphere, the weight of the atmosphere between mean sea level and a height of 5500m is: A – 25% B – 1% C – 50% D – 99% Ref: all Ans: C 24425. Which of the following statements concerning the tropopause is correct? A – The temperature of the tropopause at the equator and at the poles is equal B – The temperature remains constant above and below the tropopause C – The temperature of the tropopause at the equator is higher than at the poles D – The temperature lapse rate changes abruptly at the tropopause Ref: all Ans: D 24440. Which statement concerning the tropopause is correct? A – The temperature at the tropopause is approximately -80oC over the Poles and approximately -40oC over the equator B – Above the tropopause no clear air turbulence occurs C – in the ICAO standard atmosphere the tropopause lies higher over the Poles
than over the equator D – The layer just above the tropopause is absolutely stable Ref: all Ans: D 050-01-02 Temperature 8808. Which is true of the temperature at the tropopause? A – It is higher in polar regions than in equatorial regions B – It is higher in equatorial regions than in polar regions C – It is highest in middle latitudes D – There is no significant difference with change of latitude Ref: all Ans: A 8810. Several physical processes contribute to atmospheric warming. Which of the following contribute the most? A – Absorption and evaporation B – Solar radiation and conduction C – Absorption and vaporisation D – Convection and condensation Ref: all Ans: D 8833. An outside air temperature of -35oC is measured while cruising at FL 200. What is the temperature deviation from the ISA at this level? A – 5oC colder than ISA B – 10oC warmer than ISA C – 5oC warmer than ISA D – 10oC colder than ISA Ref: all Ans: D 8856. A layer can be: A – unstable for unsaturated air and conditionally unstable B – stable for saturated air and unstable for unsaturated air C – unstable for unsaturated air and neutral for saturated air D – stable for unsaturated air and unstable for saturated air Ref: all Ans: D 8858. At a certain position, the temperature on the 300 hPa chart is -48oC; according to the tropopause chart, the tropopause is at FL 330. What is the most likely temperature at FL 350?
A – -56.5oC B – -50oC C – -54oC D – -58oC Ref: all Ans: C 8864. Absolute instability exists whenever the environmental lapse rate: A – exceeds the saturated adiabatic lapse rate B – exceeds the dry adiabatic lapse rate C – is less than the saturated adiabatic lapse rate D – is between the dry and saturated adiabatic lapse rate Ref: all Ans: B 8887. A significant inversion at low height is a characteristic of: A – the passage of cold front B – nocturnal radiation C – advection fog D – cumulus clouds Ref: all Ans: B 8890. An inversion is a layer of air which is: A – absolutely unstable B – absolutely stable C – conditionally unstable D – conditionally stable Ref: all Ans: B 8898. An inversion is: A – an increase of temperature with height B – an increase of pressure with height C – a decrease of pressure with height D – a decrease of temperature with height Ref: all Ans: A 10024. When in the upper part of a layer warm air is advected the A – stability increases in the layer B – stability decreases in the layer C – wind will back with increasing height in the northern hemisphere D – wind speed will always decrease with increasing height in the
northern hemisphere Ref: all Ans: A 10028. Advection is: A – the same as convection B – vertical motion of air C – the same as subsidence D – horizontal motion of air Ref: all Ans: D 10038. The environmental lapse rate in an actual atmosphere: A – has a fixed value of 2oC/1000 ft B – has a fixed value of 1oC/100m C – has a fixed value of 0.65oC/100m D – varies with time Ref: all Ans: D 10066. In the lower part of the stratosphere the temperature: A – decreases with altitude B – is almost constant C – increases with altitude D – increases at first and decreases afterward Ref: all Ans: B 10068. An isothermal layer is a layer of air in which the temperature: A – increases with height at a constant rate B – increases with height C – decreases with height at a constant rate D – remains constant with height Ref: all Ans: D 10074. Which of the following is a common result of subsidence? A – Clear air turbulence at higher altitudes B – CB-clouds and thunderstorms over a large sea C – Wide spread NS and AS clouds and intense precipitation D – An inversion over a large area with haze, mist Ref: all Ans: D 10083. An air mass is called stable when: A – the vertical motion of rising air tends to become weaker and
disappears B – the temperature in a given air mass decreases rapidly with height C – the pressure in a given area is constant D – the environmental lapse rate is high, with little vertical motion of air currents Ref: all Ans: A 10095. What is the technical term for an increase in temperature with altitude? A – Subsidence B – Inversion C – Adiabatic D – Advection Ref: all Ans: B 10111. The dry adiabatic lapse rate has a value of: A – 0.5oC/100m B – 2oC/1000 ft C – 0.65oC/100m D – 1oC/100m Ref: all Ans: D 10122. How would you characterise an air temperature of 15oC at the 700 hPa level over western Europe? A – Within +/-5oC of ISA B – High C – Low D – 20oC below standard Ref: all Ans: C 10128. In an air mass with no clouds the surface temperature is 15oC and the temperature at 1000m/AGL is 13oC. This layer of air is: A – unstable B – stable C – a layer of heavy turbulence D – conditionally unstable Ref: all Ans: B
10130. The rate of decrease of temperature with height per 100m in the International Standard Atmosphere is: A – 0.65oC B – 1oC C – 0.5oC D – variable Ref: all Ans: A 10145. The radiation of the sun heats: A – the air in the troposphere only directly if no clouds are present B – the air in the troposphere directly C – the water vapour in the air of the troposphere D – the surface of the earth, which heats the air in the troposphere Ref: all Ans: D 10742. From which of the following pieces of information can the stability of the atmosphere be derived? A – Surface temperature B – Environmental lapse rate C – Dry adiabatic lapse rate D – Pressure at the surface Ref: all Ans: B 10754. What characteristic is associated with a temperature inversion? A – Stability B – Instability C – Clear ice D – Area of active storms Ref: all Ans: A 10760. Convective activity over land in mid-latitudes is greatest in: A – winter in the afternoon B – winter during the night and early morning C – summer during the night and early morning D – summer in the afternoon Ref: all Ans: D
10761. The dry adiabatic lapse rate: A – has a constant fixed value B – is greater in summer than in winter C – is greater during the night than during the day D – has a variable value Ref: all Ans: A 10802. The temperature at FL 160 is -22oC. What will the temperature be at FL 90 if the ICAO standard lapse rate is applied? A – -4oC B – -8oC C – 0oC D – +4oC Ref: all Ans: B 10812. The temperature at FL 140 is -12oC. What will the temperature be at FL 110 if the ICAO standard lapse rate is applied: A – -9oC B – -18oC C – -6oC D – -15oC Ref: all Ans: C 10820. The temperature at FL 80 is +6oC. What will the temperature be at FL 130 if the ICAO standard lapse rate is applied? A – +2oC B – -6oC C – 0oC D – -4oC Ref: all Ans: D 10839. The diurnal variation in temperature is largest when the sky is: A – clear and winds are strong B – clear and winds are weak C – overcast and winds are weak D – overcast and winds are strong Ref: all Ans: B
10861. On a clear sky, continental ground surface, wind calm, the minimum temperature is reached approximately: A – at the moment the sun rises B – half an hour before sunrise C – half an hour after sunrise D – one hour before sunrise Ref: all Ans: C 10862. The temperature at FL 110 is -5oC. What will the temperature be at FL 50 if the ICAO standard lapse rate is applied? A – -3oC B – +3oC C – 0oC D – +7oC Ref: all Ans: D 10877. The 0o isotherm is forecast to be at FL 50. At what FL would you expect a temperature of -6oC? A – FL 110 B – FL 20 C – FL 100 D – FL 80 Ref: all Ans: D 10879. A temperature of 15oC is recorded at an altitude of 500 metres above sea level. If the vertical temperature gradient is that of a standard atmosphere, what will the temperature be at the summit of a mountain, 2500 metres above sea level? A – +4oC B – +2oC C – 0oC D – -2oC Ref: all Ans: B 10887. The value of the saturated adiabatic lapse rate is closest to that of the dry adiabatic lapse rate in:
A – cumulus B – freezing fog C – stratus D – cirrus Ref: all Ans: D 10894. Around Paris on January 3rd at 1800 UTC, the surface temperature under shelter is 3oC. The sky is covered by 8 oktas of stratus. QNH is 1033 hPa. If the sky is covered all night, the minimum temperature of the night of January 3rd to January 4th should be: A – slightly above +3oC B – significantly below 0oC C – slightly below +3oC D – significantly above +3oC Ref: all Ans: C 15782. Which of the following is a common cause of ground or surface temperature inversion? A – Terrestrial radiation on a clear night with no or very light winds B – Warm air being lifted rapidly aloft, in the vicinity of mountainous terrain C – The movement of colder air under warm air, or the movement of warm air over cold air D – Heating of the air by subsidence Ref: all Ans: A 15810. How does temperature vary with increasing altitude in the ICAO standard atmosphere below the tropopause? A – increases B – At first it increases and higher up it decreases C – Remains constant D – Decreases Ref: all Ans: D 15822. How would you characterise an air temperature of 30oC
at the 300 hPa level over western Europe? A – High B – Within +/- 5oC of ISA C – Low D – Very low Ref: all Ans: A 15823. How would you characterise an air temperature of 55oC at the 200 hPa level over western Europe? A – High B – Low C – Very high D – Within +/- 5oC of ISA Ref: all Ans: D 15851. An inversion is a layer of air in which the temperature: A – increases with height more than 1oC/100m, B – decreases with height more than 1oC/100m C – increases with height D – remains constant with height Ref: all Ans: C 15858. A wide body takes off on a clear night in Dhahran, Saudi Arabia. Shortly after take off the aircraft’s rate of climb drops to zero. This can be due to: A – low relative humidity B – a very strong temperature inversion C – sand/dust in the engines D – very pronounced downdrafts Ref: all Ans: B 15876. In still air the temperature decreases at an average of 1.2oC per 100m increase in altitude. This temperature change is called: A – environmental lapse rate B – saturated adiabatic lapse rate C – dry adiabatic lapse rate D – normal lapse rate Ref: all
Ans: A 16340. In the disturbed temperate regions: A – winters are generally mild B – the weather is mainly governed by travelling frontal depressions C – the wet season is normally from May to September D – the surface winds are moderate westerlies Ref: all Ans: B 16348. Horizontal differences in the mean temperature of a layer are caused by: A – insulation B – advection C – differential heating of the earth’s surface D – change of air mass Ref: all Ans: C 16351. Which of the following statements concerning the thermal wind component (TWC) is true? A – TWC decreases as the horizontal mean temperature gradient increases B – TWC increases as the horizontal mean temperature gradient increases C – the greater the TWC, the greater the reduction in the upper wind D – the greater the TWC, the greater the surface wind Ref: all Ans: B 16555. Which one of the following describes normal conditions? A – Temperature decreases with height in the troposphere B – Temperature increases with height in the troposphere C – Temperature decreases with height in the stratosphere D – Temperature decreases at a similar rate in the troposphere as in the stratosphere Ref: all Ans: A 16556. For international aviation meteorological purposes, temperature is measured in degrees: A – Fahrenheit
B – Celsius C – Absolute D – Kelvin Ref: all Ans: B 16571. If the depth of the troposphere increases, the temperature at the tropopause must: A – decrease B – stay the same C – increase D – impossible to say Ref: all Ans: A 16594. Air at T = +16oC and DP = +4oC is forced from sea level over a 10,000 ft mountain range and descends back to sea level on the other side. If the leeward condensation level is observed to be 8,000 ft what will be the final temperature? A – 18oC B – 20oC C – 22oC D – 24oC Ref: all Ans: C 24216. A parcel of unsaturated air is forced to rise through an isothermal layer. So long as it remains unsaturated, the temperature of the parcel: A – decreases 0.65oC per 100m B – remains constant C – decreases 1oC per 100m D – becomes equal to the temperature of the isothermal layer Ref: all Ans: C 24221. Absolute instability in the atmosphere will occur when the environmental lapse rate is A – greater than both saturated adiabatic lapse rate and dry adiabatic lapse rate B – less than saturated adiabatic lapse rate
C – less than both saturated adiabatic lapse rate and dry adiabatic lapse rate D – greater than saturated adiabatic lapse rate but less than dry adiabatic lapse rate Ref: all Ans: A 24222. According to ISA the temperature in the lower part of the stratosphere: A – decreases with altitude B – is almost constant C – increases with altitude D – increases at first and decreases afterward Ref: all Ans: B 24269. For both saturated and unsaturated air instability will occur when the A – environmental lapse rate is greater than both dry adiabatic lapse rate and saturated adiabatic lapse rate B – environmental lapse rate is greater than saturated adiabatic lapse rate but less than dry adiabatic lapse rate C – environmental lapse rate is less than both dry adiabatic lapse rate and saturated adiabatic lapse rate D – dry adiabatic lapse rate is less than saturated adiabatic lapse rate but greater than environmental lapse rate Ref: all Ans: A 24291. In the lower levels of the atmosphere when the environmental lapse rate is greater than saturated adiabatic lapse rate but les than dry adiabatic lapse rate – the air mass is described as being A – conditionally unstable B – stable C – unstable D – absolutely unstable Ref: all Ans: A
24353. The temperature lapse rate of the standard atmosphere in the troposphere is: A – 2.5oC/1000 ft B – 3oC/1000 ft C – 6.5oC/1000 ft D – 2oC/1000 ft Ref: all Ans: D 24386. What is, approximately, the temperature at 20000 ft in the ICAO Standard Atmosphere? A – -20oC B – -15oC C – -25oC D – -30oC Ref: all Ans: C 050-01-03 Atmospheric pressure 10035. What positions are connected by isobars on the surface weather chart? A – Positions with the same air pressure at a given level B – Positions with the same temperature at a given level C – Positions with the same wind velocity at a given level D – Positions with the same relative pressure heights Ref: all Ans: A 10059. In the troposphere the decrease of pressure per 100m increase in height: A – is greater at higher levels than at lower levels B – remains constant at all levels C – is smaller at higher levels than at lower levels D – is in the order of 27 hPa near MSL Ref: all Ans: C 10085. An isohypse (contour): A – indicates the altitude of the zero degree isotherm B – is the longest slope line of a frontal surface C – is the limit between two air masses of different temperature D – indicates the true altitude of a pressure level Ref: all Ans: D 10137. The station pressure used in surface weather charts is:
A – QNE B – QFE C – QNH D – QFF Ref: all Ans: D 10807. Which of the following is true concerning atmospheric pressure? A – It is higher in winter than in summer B – It decreases with height C – It is higher at night than during the day D – It always decreases with height at a rate of 1 hPa per 8m Ref: all Ans: B 10822. Isobars on a surface chart are lines of equal: A – QFE B – QFF C – QNE D – QNH Ref: all Ans: B 15780. What is approximate vertical interval which is equal to a pressure change of 1 hPa at an altitude of 5,500m? A – 15m (50 ft) B – 8m (27 ft) C – 32m (105 ft) D – 64m (210 ft) Ref: all Ans: A 15809. The isobars drawn on a surface weather chart represent lines of equal pressure: A – at height of observatory B – at a determined density altitude C – reduced to sea level D – at flight level Ref: all Ans: C 15837. Between which latitudes are you most likely to find the region of travelling low pressure systems? A – 25o – 35o
B – 10o – 15o C – 55o – 75o D – 35o – 55o Ref: all Ans: C 15877. Assume that an aircraft is flying in the northern hemisphere at the 500 hPa pressure surface on a heading of 270 degrees. Which of the following statements is correct? A – If in this pressure surface the wind comes from the direction 360 degrees, then true altitude is increasing B – If in this pressure surface the wind comes from the direction 180 degrees, then true altitude is increasing C – If in this pressure surface the wind comes from the direction 20 degrees, then true altitude is increasing D – If in this pressure surface the wind comes from the direction 090 degrees, then true altitude is increasing Ref: all Ans: A 16349. At altitude, the atmospheric pressure in a column of warm air is likely to be: A – lower than at the same height in a column of cold air B – higher than at the same height in a column of cold air C – the same irrespective of the temperature D – depends on the relative humidity Ref: all Ans: B 16357. Which of the following statements is true? A – High contour values are equivalent to high pressure B – Low contour values are equivalent to high pressures C – High contour values are equivalent to low pressure D – There is no direct relationship between contour values and pressure Ref: all Ans: A 16358. When flying towards high contour values an aircraft will experience:
A – headwind B – tailwind C – port drift D – starboard drift Ref: all Ans: C 16363. Contour heights are: A – true heights AGL B – true heights AMSL C – indicated heights above 1013.25 mb D – do not indicate heights at all Ref: all Ans: B 16364. When flying from high to low contour values, which of the following is incorrect? A – the true height of the aircraft will be falling B – the pressure altimeter will indicate a constant value C – the indicated height of the aircraft will be constant D – the indicated height of the aircraft will only be true if 1013.25 mb is set Ref: all Ans: D 16436. You are making a long distance flight and have chosen a suitable cruising altitude for the whole flight. Towards the end of your flight, you have descended. What may be the reason for this? A – you are approaching a region of high pressure B – you are approaching a region of low pressure C – standard pressure has dropped D – temperature has increased Ref: all Ans: B 16438. Select the correct statement regarding the wind direction in connection with the high and low pressure systems in the Northern Hemisphere: A – the winds blow counter clockwise around a high and clockwise in a low B – the winds blow clockwise in both highs and lows C – the winds blow clockwise in a high and counter clockwise in a low
D – the winds blow counter clockwise in both highs and lows Ref: all Ans: C 16439. If you fly across the isobars towards a region of high pressure in the Northern Hemisphere you will: A – drift to the right B – drift to the left C – experience no drift but experience a headwind D – experience no drift but experience a tailwind Ref: all Ans: B 16511. According to definition, flight levels are surfaces with constant air pressure determined from a certain pressure value. Which is this value? A – 1013.25 hPa B – 1025.13 hPa C – Actual QFE D – Actual QNH Ref: all Ans: A 16517. If you have a column of air limited by two isobaric surfaces at a pressure difference of 100 hPa, the distance between the pressure surfaces will change if mean temperature and mean pressure of the column of air change. In which of the following alternatives will the change of temperature and pressure interact to shorten the distance as much as possible? A – The temperature increases and pressure increases B – The temperature decreases and pressure increases C – The temperature increases and pressure decreases D – The temperature decreases and pressure decreases Ref: all Ans: B 16534. Lines joining points of equal pressure are known as: A – Isotherms B – Isopleths C – Isobars D – Isotachs Ref: all
Ans: C 16544. A pressure difference of 10 hPa close to the ground corresponds to a height difference of: A – about 50m B – about 150m C – about 300ft D – about 30ft Ref: all Ans: C 16587. A rising parcel of air which has no heat entering or leaving it, will: A – reduce in pressure, rise in temperature, decrease in density B – maintain volume, decrease in density, reduce in pressure C – maintain pressure, reduce in density, increase in volume D – reduce in pressure, decrease in density, increase in volume Ref: all Ans: D 24345. The QFF at an airfield located 400 metres above sea level is 1016 hPa. The air temperature is 10oC higher than a standard atmosphere. What is the QNH? A – 1016 hPa B – More than 1016 hPa C – Less than 1016 hPa D – It is not possible to give a definitive answer Ref: all Ans: B 24431. Which of the following statements is correct? A – Cumulus clouds and a good viability are normally observed in a warm sector in winter B – Cumulus clouds and a good visibility are normally observed in a warm sector in autumn C – Normally atmospheric pressure stops falling rapidly behind a warm front, the air temperature rises D – At warm fronts thunderstorms are often observed Ref: all Ans: C 050-01-04 Atmospheric density
10146. Under what condition does pressure altitude have the same value as density altitude? A – When the altimeter has no position error B – At sea level when the temperature is 0oC C – At standard temperature D – When the altimeter setting is 1013.2 hPa Ref: all Ans: C 15779. At FL 180, the air temperature is -35oC. The air density at this level is: A – unable to be determined without knowing the QNH B – greater than the density of the ISA atmosphere at FL 180 C – less than the density of the ISA atmosphere at FL 180 D – equal to the density of the ISA atmosphere at FL 180 Ref: all Ans: B 16525. What happens if density altitude is 3000 ft at an airport whose elevation is 1000 ft? A – Take off and landing performance will be unaffected B – The altimeter will indicate 3000 ft when the aircraft is on the ground C – Take off and landing performance will be about the same as for an airport with an elevation of 3000 ft D – Indicated speed at 50 kt on take off and landing will be higher than in a standard atmosphere Ref: all Ans: C 24454. With all other quantities being constant, the density of the atmosphere increases with increasing: A – relative humidity B – air pressure C – stability D – temperature Ref: all Ans: B 050-01-05 International Standard Atmosphere (ISA) 8840. The lowest assumed temperature in the International
Standard Atmosphere (ISA) is: A – -44.7oC B – -273oC C – -58.5oC D – -100oC Ref: all Ans: C 8850. A 500 hPa pressure level can vary in height. In temperate regions which of the following average heights is applicable? A – FL 180 B – FL 160 C – FL 100 D – FL 390 Ref: all Ans: A 8869. A 700 hPa pressure level can vary in height. In temperate regions which of the following average heights is applicable? A – FL 100 B – FL 180 C – FL 300 D – FL 390 Ref: all Ans: A 8882. The temperature at 10000 ft in the International Standard Atmosphere is: A – -20oC B – 0oC C – -5oC D – -35oC Ref: all Ans: C 8884. If you are flying at FL 120 and the outside temperature is -2oC, at what altitude will the freezing level be? A – FL 110 B – FL 130 C – FL 150 D – FL 90 Ref: all
Ans: A 10073. A 850 hPa pressure level can vary in height. In temperate regions which of the following average heights is applicable? A – FL 300 B – FL 100 C – FL 50 D – FL 390 Ref: all Ans: C 10120. If you are flying at FL 300 in an air mass that is 15oC warmer than a standard atmosphere, what is the outside temperature likely to be? A – -30oC B – -45oC C – -60oC D – -15oC Ref: all Ans: A 10125. In the International Standard Atmosphere the decrease in temperature with height below 11 km is: A – 1oC per 100m B – 0.65oC per 100m C – 0.5oC per 100m D – 0.6oC per 100m Ref: all Ans: B 10127. What is the vertical temperature lapse rate, up to 11 km, in the standard ICAO atmosphere? A – 2oC per 1000m B – 4.5oC per 1000m C – 3oC per 1000m D – 6.5oC per 1000m Ref: all Ans: D 10136. A 200 hPa pressure altitude level can vary in height. In temperate regions which of the following average heights is applicable? A – FL 50 B – FL 300
C – FL 100 D – FL 390 Ref: all Ans: D 10736. A 300 hPa pressure level can vary in height. In temperate regions which of the following average heights is applicable? A – FL 100 B – FL 390 C – FL 300 D – FL 50 Ref: all Ans: C 19763. If you are flying at FL 100 in an air mass that is 10oC warmer than a standard atmosphere, what is the outside temperature likely to be? A – +15oC B – +5oC C – -10oC D – -15oC Ref: all Ans: B
