1.
1. Which of the following describes the tropopause?Which of the following describes the tropopause? a)
a) The point where temperature increases with heightThe point where temperature increases with height b)
b) A layer between the troposphere and the stratosphereA layer between the troposphere and the stratosphere c)
c) The boundary between the troposphere and the stratosphereThe boundary between the troposphere and the stratosphere d)
d) All of the aboveAll of the above 2.
2. What is the coldest time of the day?What is the coldest time of the day? a)
a) One hour before dawnOne hour before dawn b)
b) Thirty minutes before dawnThirty minutes before dawn c)
c) DawnDawn d)
d) Thirty minutes after dawnThirty minutes after dawn 3.
3. What is the height and What is the height and temperature of the tropopause?temperature of the tropopause? a)
a) 8km and -40 degree Celsius at equator8km and -40 degree Celsius at equator b)
b) 16km and -75 degree Celsius at the 16km and -75 degree Celsius at the equatorequator c)
c) 16km and -40 degree Celsius at the poles16km and -40 degree Celsius at the poles d)
d) 8km and -75 degree Celsius at the poles8km and -75 degree Celsius at the poles 4.
4. What is the pressure lapse rate at 5500m in the ISA atmosphere?What is the pressure lapse rate at 5500m in the ISA atmosphere? a) a) 27 feet/hpa27 feet/hpa b) b) 50 feet/hpa50 feet/hpa c) c) 100 feet/hpa100 feet/hpa d) d) 150 feet/hpa150 feet/hpa 5.
5. What is the lowest temperature in ISA?What is the lowest temperature in ISA? a) a) -50.6°C-50.6°C b) b) -56.5°C-56.5°C c) c) -100°C-100°C d) d) 56.5°C56.5°C 6.
6. Where is the ozone layer?Where is the ozone layer? a) a) StratosphereStratosphere b) b) TroposphereTroposphere c) c) TropopauseTropopause d) d) IonosphereIonosphere 7.
7. The tropopause is?The tropopause is? a)
a) The line where the temperature no longer decreases with The line where the temperature no longer decreases with heightheight b)
b) The layer between the tropopause and the stratosphereThe layer between the tropopause and the stratosphere c)
c) The layer beyond which only CI cloud occurThe layer beyond which only CI cloud occur d)
d) The line indicating clear air turbulenceThe line indicating clear air turbulence 8.
b) Air is a poor conductor of heat
c) Temperature lapse rate is very frequently above 3 °C /1000 feet. d) The air is a good conductor of heat.
9. Most of the water vapour in the atmosphere is contained in the? a) Tropopause
b) Stratosphere c) Troposphere d) Stratopause
10. The captain of an aircraft needs to know the height of the tropopause because a) It normally represents limit of the weather
b) Density starts to increase
c) There are no longer jet streams and CAT d) It indicates the height of the thermal wind
11. The level of the atmosphere where temperature ceases to fall with increase in height is known as
a) Troposphere b) Stratopause c) Stratosphere d) Tropopause
12. Which statement is correct when considering the lowest layers of the atmosphere?
a) The majority of the weather is contained in the stratosphere and its upper boundary is the tropopause
b) The majority of the weather is contained in the troposphere and its upper boundary is the tropopause
c) The majority of the weather is contained in the tropopause and its upper boundary is the troposphere
d) The majority of the weather is contained in the troposphere and its upper boundary is the stratosphere
13. In ISA the temperature is isothermal a) Up to 36090 feet/11kms
b) From 36090 feet/11kms to 65617 feet/20kms c) From 36090 feet/11kms to 104987 feet/32kms d) 36090 feet/11kms to 45090 feet/13.75kms 14. ISA assumes that sea level atmospheric pressure is
a) 1013.25 HPA and decreases with increase in height b) 1013.25 HPA and increases with increase in height
d) 1013.25 HPA and decreases with increase in height up to tropopause and then it remains constant
15. At sea level the ISA density is stated to be a) 1225 grams per cubic meter
b) 1252 grams per cubic meter c) 1013.2 HPA
d) 29.6 inches of mercury
16. Which of the following statements is most correct when describing ISA a) The MSL pressure is 1013.25 HPA and temperature is +15°C
b) The MSL pressure is 1013.25 HPA and the temperature is +15°C with a lapse rate of 1.98°C/1000 feet
c) The MSL pressure is 1013.25 HPA and the temperature is +15°C with a lapse rate of 1.98°C/1000 feet up to 36090 feet above which there is frequently an inversion d) The MSL pressure is 1013.25 HPA and the temperature is +15°C with lapse rate of
1.98°C/1000 feet up to 36,090 feet. 17. The following is true on ISA
a) At MSL temperature is +15°C , pressure 1013.25 HPA ,density 1125g/m b) Within the tropopause the temperature decreases by 6.5°C per km c) The tropopause is at a height of 36090 feet AGL
d) The temperature at the tropopause is 226.5°K 18. Height of the tropopause at equator is
a) 10-12 kms b) 12-14 kms c) 14-16 kms d) 16-18 kms
19. Height of the tropopause at poles is a) 08-10 kms
b) 10-12 kms c) 12-14 kms d) 12-13 kms
20. Higher the surface temperature the tropopause will be a) Higher
b) Lower c) Same d) Cannot say
b) Varies with altitude c) Varies with latitude d) None of the above
22. Above 8km lower temperatures are over a) Poles
b) Mid-latitudes c) Equator
23. The atmosphere is heated by a) Solar radiation
b) Heat from the earth surface c) Heat from above
d) By winds 24. Tropos means
a) Turning
b) Under current c) Convection
25. CO2 and H2O are also called a) Greenhouse gases b) Rare earth gases c) Essential gases d) None 26. Troposphere is generally a) Stable b) Unstable c) Neutral 27. Stratosphere is a) Stable b) Unstable c) Neutral
28. Tropopause is discontinuous at about a) 30°Lat
b) 40°Lat c) 60°Lat d) Equator
29. Most of the atmospheric mass is contained in the a) Troposphere
b) Stratosphere c) Hetrosphere d) Tropopause
30. Stratosphere extends from tropopause to a) 30kms
b) 40kms c) 50kms d) 60kms
31. The middle atmosphere level with temperature inversion and stability is cal led a) Troposphere
b) Tropopause c) Stratosphere d) Stratopause
32. Mother of pearl cloud occurs in a) Mesosphere
b) Thermosphere c) Stratosphere d) Troposphere
33. The temperature in ISA at 17km is a) -56.5°C
b) -65.5°C c) -35.5°C d) -56.6°C
34. The ratio of oxygen to nitrogen by weight in atmosphere is a) 1:2
b) 1:3 c) 1:4 d) 1:5
35. The ratio of oxygen to nitrogen by volume in atmosphere is a) 1:2
b) 1:3 c) 1:4 d) 1:5
36. The proportion of CO2 in the atmosphere is a) 3%
37. Maximum concentration of Ozone is at a height of a) 10-15kms
b) 15-20kms c) 20-25kms d) 25-30kms
38. Supplemental oxygen is required when flying above a) 5000 feet
b) 7000 feet c) 10000 feet d) 13000 feet
39. CO2 and H2O keep the atmosphere a) Warm
b) Cold
c) Have no effect
40. Noctilucent clouds occur in a) Thermosphere
b) Mesosphere c) Stratosphere
41. Temperature at 2 km is 05°c, what is the ISA deviation a) -05°c
b) -02°c c) 03°c
42. Pressure at MSL is 1002.25 HPA , find the ISA deviation a) -11 HPA
b) 10 HPA c) 12 HPA d) 14 HPA
43. In actual atmosphere temp at 19km is -60°c, find the ISA deviation a) -4.5°
b) -5.5°c c) -3.5°c
44. Half of the atmospheric air mass is contained below a) 20,000 feet
b) 15,000 feet c) 10,000 feet d) 18,000 feet
45. In JSA the lapse rate is a) 2°c/1000 feet b) 2°c/km
c) 5°c/km
