TEMPERATURE – Air – DGCA Question Bank For Politics

#1. Convective activity over land in mid-latitudes is greatest in

summer during the night and early morning

winter in the afternoon.

summer in the afternoon.

winter during the night and early morning.

#2. Several physical processes contribute to atmospheric warming. Which of the following contribute the most?

Absorption and vaporization.

Absorption and evaporation.

Convection and condensation.

Solar radiation and conduction.

#3. The temperature at FL 160 is -22°C. What will the temperature be at FL 90 if the ICAO standard lapse rate is applied?

+4°C

-8°C

-4°C

0°C

#4. The morning following a clear, calm night when the temperature has dropped to the dew point, is likely to produce

a cold front

haze

good clear weather

radiation fog

#5. The environmental lapse rate in an actual atmosphere

has a fixed value of 2°C/1000 FT

varies with time

has a fixed value of 1°C/100m

has a fixed value of 0.65°C/100m

#6. An isothermal layer is a layer of air in which the temperature

decreases with height at a constant rate

increases with height at a constant rate

remains constant with height

increases with height

#7. Around Paris on January 3rd at 1800 UTC, the surface temperature, under shelter, is 3°C. 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

slightly below +3°C

significantly below 0°C.

slightly above +3°C

significantly above +3°C.

#8. An inversion is a layer of air in which the temperature

remains constant with height

increases with height more than 1°C/100m

decreases with height more than 1°C/100m

increases with height

#9. An inversion is

a decrease of pressure with height

a decrease of temperature with height

an increase of temperature with height

an increase of pressure with height

#10. On a clear sky, continental ground surface, wind calm, the minimum temperature is reached approximately

one hour before sunrise

half an hour after sunrise

half an hour before sunrise

at the moment the sun rises

#11. The radiation of the sun heats

the air in the troposphere only directly if no clouds are present

the surface of the earth, which heats the air in the troposphere

the air in the troposphere directly

the water vapour in the air of the troposphere

#12. Which of the following is a common cause of ground or surface temperature inversion?

Terrestrial radiation on a clear night with no or very light winds

Warm air being lifted rapidly aloft, in the vicinity of mountainous terrain.

The movement of colder air under warm air, or the movement of warm air over cold air.

Heating of the air by subsidence

#13. The diurnal variation in temperature is least when the sky is

clear and winds are weak

clear and winds are strong

overcast and winds are weak

overcast and winds are strong

#14. What is the technical term for an increase in temperature with altitude?

Advection

Inversion

Subsidence

Adiabatic

#15. The diurnal variation in temperature is largest when the sky is

clear and winds are weak

clear and winds are strong

overcast and winds are weak

overcast and winds are strong

#16. If you are flying at FL 100 in an air mass that is 10°C warmer than a standard atmosphere, what is the outside temperature likely to be?

-10°C

-15°C

+5°C

+15°C

#17. In the International Standard Atmosphere the decrease in temperature with height below 11 km is

0.6°C per 100m

0.65°C per 100m

1°C per 100m

0.5°C per 100m

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