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