1. the Atmosphere

THE ATMOSPHERE 1. Which of the following describes the tropopause? a) The point where temperature increases with height b) A layer between the troposphere and the stratosphere

c) The boundary between the troposphere and the stratosphere d) All of the above 2. What is the coldest time of the day? a) One hour before dawn b) Thirty minutes before dawn c)

Dawn

d) Thirty minutes after dawn 3. What is the height and temperature of the tropopause? a) 8km and -40 degree Celsius at equator

b) 16km and -75 degree Celsius at the equator c)

16km and -40 degree Celsius at the poles

d) 8km and -75 degree Celsius at the poles 4. What is the pressure lapse rate at 5500m in the ISA atmosphere? a) 27 feet/hpa

b) 50 feet/hpa c) 100 feet/hpa d) 150 feet/hpa 5. What is the lowest temperature in ISA? a) -50.6°C

b) -56.5°C c)

-100°C

d) 56.5°C 6. Where is the ozone layer?

a) Stratosphere b) Troposphere c) Tropopause d) Ionosphere 7. The tropopause is?

a) The line where the temperature no longer decreases with height b) The layer between the tropopause and the stratosphere c)

The layer beyond which only CI cloud occur

d) The line indicating clear air turbulence 8. One of the most im portant characteristics of the atmosphere is? a) Density is constant above 10,000 feet

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THE ATMOSPHERE 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 c)

1013.25 HPA and falls to about half this value at 30,000 feet

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THE ATMOSPHERE 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 21. Height of tropopause is a) Constant

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THE ATMOSPHERE 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

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THE ATMOSPHERE 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% b) 0.3%

c) 0.03%

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THE ATMOSPHERE

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

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THE ATMOSPHERE 45. In JSA the lapse rate is

a) 2°c/1000 feet b) 2°c/km c)

5°c/km

d) 1.98°c/1000 feet

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