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