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Question Bank
Questions for ATMOSPHERE
Answer the following questions
Test Mode
Training Mode
1. Stratosphere is ______
Stable
Unstable
Neutral
2. Half of the atmospheric air mass is contained _____ below
20,000 ft
10,000 ft
15,000 ft
3. CO₂ and H₂O ae also called
Rare Earth Gases
Green house Gases
4. Most of atmospheric mass is contained in
Heterosphere
Troposphere
Stratosphere
5. In ICAO ISA the atmosphere is assumed to be isothermal
11 to 32 km
11 to 20 km
in stratopshere
11 to 16 km
6. Tropopause is discontinuous at about
80º lat
40º lat
30º lat
7. Noctilucent clouds occur in
Stratosphere
Mesosphere
Thermosphere
8. Height of tropopause
varies with latitude
is constant
varies with altitude
9. CO² and H²O keep the atmosphere
Warm
Have no effect
Cold
10. One of the characteristics of our atmosphere is
Lapse rate in the stratosphere is positive
Density is constant above 8 km
Equator is warmer than poles above 10 km
Poor conductor of heat and electricity
11. By volume, the approximate ratio of O² to N² in the atmosphere is
1:3
1:4
1:5
12. Higher the surface temperature_______ would be the tropopause
Lower
Higher
Same
13. Above 8 km the lower temperatures are over
Mid Latitudes
Poles
Equator
14. Troposphere is generally
Neutral
stable
Unstable
15. In actual atmosphere temp. at 19 km is -60°C. Find the ISA deviation?
-05.5°C
-4.5°C
-03.5°C
16. In jet standard atmosphere the Lapse Rate is
2°C/1000 ft
5°C/km
2°C/km
17. Mother of Pearl clouds occur in
Mesosphere
Stratosphere
Thermosphere
18. The rate of fall of temperatures with height, called
Isothermal rate
Lapse rate
Inversion rate
19. Tropos means ______
Convection
Turning
Under current
20. The atmosphere up to 80 km has a nearly similar composition and is called the Homosphere. Its uniform composition is due to
Gravitation of earth
Mixing due to turbulence
Pressure
21. In ISA, the mean sea level temperature is
25°C
10°C
15°C
22. Height of Tropopause at equator is
16-18km
10-12 km
12-14 km
23. Negative lapse rate of temperature is
temperature fall with height
Isothermal rate
temperature rise with lowering height
Temperature rise with height
24. There is reversal of temperature in the atmosphere at 8 km because
Lapse rate at equator is the same as at poles even above the poles
Lapse rate at equator is always higher than at poles
Lapse rate reverses at poles and becomes negative
Lapse rate at poles is always higher than at equator
25. Temperature at 2 km is 05°C what is ISA deviation. Hint: (Actual - ISA)
03°C
-05°C
-02°C
26. By volume, the proportion of CO² in the atmosphere is
3%
0.3%
0.03%
27. In ISA atmosphere the tropopause occurs at a height of
11 km
8-10 km
16-18 km
28. The knowledge of the height of tropopause is important for a pilot because
weather is mainly confined up to this level
clouds rarely reach up to this height due to jetstreams
stratosphere starts at this height where all solar radiation are absorbed
29. Lowest Layer of atmosphere is
Stratosphere
Troposphere
Tropopause
30. Most of the transfer of heat in the atmosphere is due to
Conduction and freezing
Convection and evaporation
Condensation, sublimation and freezing
Sublimation and radiation
31. Height of Tropopause at poles is
12-14 km
08-10 km
12-13 km
32. Maximum concentration of ozone is at a height of
10-15 km
30-35 km
20-25 km
33. Most of the water vapour in the atmosphere is confined up to
Stratosphere
Mid atmosphere
lower troposphere
30,000 ft
34. In actual atmosphere the lapse rate could
Assume any value
rise up to 50 km
fall up to 8 km.
35. Heat transfer in the atmosphere is maximum due to
sensible heat
convection
radiation
latent heat
36. The middle atmosphere layer with temperature inversion and stability
Troposphere
Stratosphere
Tropopause
37. Atmosphere is heated by
From above
Solar Radiation
Heat from earth surface
38. Nacreous clouds occur in
Upper Stratosphere
Mesosphere
Thermosphere
39. Tropical Tropopause extends from the equator to Lat.35° - 40°. Over India it is at
14-15 km
20-21 km
16-16.5 km
40. Stratosphere extends from Tropopause to
50 km
40 km
60 km
41. Pressure at MSL is 1002.25 hPa. Find the ISA deviation Hint: (Actual-ISA)
10 hPa
-11 hPa
12 hPa
42. By weight, approximate ratio of O² and N² in the atmosphere is
1:4
1:3
1:5
43. Lapse rate in the troposphere is produced by _____ and in the stratosphere by ______
Terrestrial radiation; solar radiation
rising air; solar radiation
solar radiation; convection
Evaporation; condensation
44. Additional oxygen is needed while flying above
10000 ft
7000 ft
5000 ft
45. The temperature of ISA at 17km is
-35.5°C
-56.5°C
-65.5°C
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