Atmosphere- Meteorology- Oxford

#1. How does the height of the tropopause normally vary with latitude in the Northern Hemisphere?

It decreases from south to north

It increases from south to north

It remains constant from north to south

It remains constant throughout the year

#2. What, approximately, is the average height of the tropopause over the Equator?

8 km

16 km

11 km

50 km

#3. In the International Standard Atmosphere the decrease in temperature with height below 11 km is:

0.5°C/100 m

0.6°C/100 m

0.65°/100 m

1°C/100 m

#4. The 200 hPa pressure altitude level can vary in height. In temperate regions which of the following average heights is applicable?

FL390

FL300

FL100

FL50

#5. The temperature at FL110 is -12°C. What will the temperature be at FL140 if the ICAO standard lapse rate is applied?

-6°C

-18°C

-9°C

-15°C

#6. At a certain position the temperature on the 300 hPa chart is -54°C, and according to the significant weather chart the tropopause is at FL330. What is the most likely temperature at FL350?

-48°C

-60°C

-56.5°C

-64°C

#7. What is the boundary between the troposphere and the stratosphere called?

Ionosphere

Stratosphere

Atmosphere

Tropopause

#8. Which constant pressure altitude chart is standard for 4781 ft pressure level (FL50)?

500 hPa

300 hPa

850 hPa

700 hPa

#9. An outside air temperature of -30°C is measured whilst cruising at FL200. What is the temperature deviation from the ISA at this level?

5°C colder than ISA

5°C warmer than ISA

10°C colder than ISA

10°C warmer than ISA

#10. What is the most likely temperature at the tropical tropopause?

56.5°C

-75°C

-40°C

-25°C

#11. Which one of the following statements applies to the tropopause?

It is, by definition, an isothermal layer

It indicates a strong temperature lapse rate

It is, by definition a temperature inversion

It separates the troposphere from the stratosphere

#12. In the lower part of the stratosphere the temperature:

is almost constant

decreases with altitude

increases with altitude

increases at first and decreases afterwards

#13. What is the approximate composition of the dry air by volume in the troposphere?

10% oxygen, 89% nitrogen and the rest other gases

88% oxygen, 9% nitrogen and the rest other gases

50% oxygen, 40% nitrogen and the rest other gases

21% oxygen, 78% nitrogen and the rest other gases

#14. How does temperature vary with increasing altitude in the ICAO standard atmosphere below the tropopause?

Remains constant

Decreases

Increases

At first it increases and higher up it decreases

#15. How would you characterize an air temperature of -15°C at the 700 hPa level over western Europe?

Within +/-5°C of ISA

20°C below standard

Low

High

#16. If you are flying at FL300 in an air mass that is 15°C warmer than a standard atmosphere what is the outside temperature likely to be?

-15°C

-30°C

-45°C

-60°C

#17. If you are flying at FL140 and the outside temperature is -8°C at what altitude will the freezing level be?

FL75

FL100

FL130

FL180

#18. What is the most important constituent in the atmosphere from a weather standpoint?

Carbon dioxide

Oxygen

Water vapour

Methane

#19. The average height of the tropopause at a latitude of 50° is about:

8 km

11 km

14 km

16 km

#20. Between mean sea level and a height of 20 km the lowest temperature in the international standard atmosphere (ISA) is:

-273°C

-44.7°C

-56.5°C

-100°C

#21. The international standard atmosphere (ISA) assumes that the temperature will reduce at a rate of:

1.98°C per 1000 feet up to 36090 feet after which it remains constant to 65 617 feet

1.98°C per 1000 feet up to 36090 feet and then will rise at 0.3°C per 1000 feet up to 65617 feet when it will remain constant

2°C per 1000 feet up to 65617 feet after which it will remain constant to 104 987 feet

2°C per 1000 feet up to 36090 feet and will then increase at 0.3°C per 1000 feet up to 65 617 feet

#22. In the mid-latitudes the stratosphere extends on average from:

0 to 11 km

11 to 50 km

50 to 85 km

11 to 20 km

#23. A temperature of +15°C is recorded at an altitude of 500 metres above mean sea level. If the vertical temperature gradient is that of a standard atmosphere, what will be the temperature at the summit of a mountain 2500 metres above mean sea level?

0°C

+2°C

+4°C

-2°C

#24. In relation to the total weight of the atmosphere, the weight of the atmosphere between mean sea level and a height of 5500 m is approximately:

1%

25%

50%

99%

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Atmosphere- Meteorology- Oxford

Results

#1. How does the height of the tropopause normally vary with latitude in the Northern Hemisphere?

#2. What, approximately, is the average height of the tropopause over the Equator?

#3. In the International Standard Atmosphere the decrease in temperature with height below 11 km is:

#4. The 200 hPa pressure altitude level can vary in height. In temperate regions which of the following average heights is applicable?

#5. The temperature at FL110 is -12°C. What will the temperature be at FL140 if the ICAO standard lapse rate is applied?

#6. At a certain position the temperature on the 300 hPa chart is -54°C, and according to the significant weather chart the tropopause is at FL330. What is the most likely temperature at FL350?

#7. What is the boundary between the troposphere and the stratosphere called?

#8. Which constant pressure altitude chart is standard for 4781 ft pressure level (FL50)?

#9. An outside air temperature of -30°C is measured whilst cruising at FL200. What is the temperature deviation from the ISA at this level?

#10. What is the most likely temperature at the tropical tropopause?

#11. Which one of the following statements applies to the tropopause?

#12. In the lower part of the stratosphere the temperature:

#13. What is the approximate composition of the dry air by volume in the troposphere?

#14. How does temperature vary with increasing altitude in the ICAO standard atmosphere below the tropopause?

#15. How would you characterize an air temperature of -15°C at the 700 hPa level over western Europe?

#16. If you are flying at FL300 in an air mass that is 15°C warmer than a standard atmosphere what is the outside temperature likely to be?

#17. If you are flying at FL140 and the outside temperature is -8°C at what altitude will the freezing level be?

#18. What is the most important constituent in the atmosphere from a weather standpoint?

#19. The average height of the tropopause at a latitude of 50° is about:

#20. Between mean sea level and a height of 20 km the lowest temperature in the international standard atmosphere (ISA) is:

#21. The international standard atmosphere (ISA) assumes that the temperature will reduce at a rate of:

#22. In the mid-latitudes the stratosphere extends on average from:

#23. A temperature of +15°C is recorded at an altitude of 500 metres above mean sea level. If the vertical temperature gradient is that of a standard atmosphere, what will be the temperature at the summit of a mountain 2500 metres above mean sea level?

#24. In relation to the total weight of the atmosphere, the weight of the atmosphere between mean sea level and a height of 5500 m is approximately:

Air Density- Meteorology- Oxford

Humidity- Meteorology- Oxford

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