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Question Bank
Questions for ATMOSPHERE 1
Answer the following questions
Test Mode
Training Mode
1. At a certain position, the temperature on the 300 hPa chart is -48°C; according to the tropopause chart, the tropopause is at FL 330. What is the most likely temperature at FL 350?
-56°C
-54°C
-58°C
-50°C
2. How would you characterise an air temperature of -15°C at the 700 hPa level over Western Europe?
20°C below standard
Low
High
Within +/-5°C of ISA
3. How does temperature vary with increasing altitude in the ICAO standard atmosphere below the tropopause?
Increases
Remains constant
At first it increases and higher up it decreases
Decreases
4. What is the most likely temperature at the tropical tropopause?
-35°
-55°
-75°
-25°
5. The temperature at 10,000 FT in the International Standard Atmosphere is
0°C
-5°C
-35°C
-20°C
6. The rate of decrease of temperature with height per 100 m in the International Standard Atmosphere is
variable
0.5°C
1°C
0.65°C
7. In the mid-latitudes the stratosphere extends on an average from
50 to 85 km
0 to 11 km
11 to 50 km
85 to more than 200 km
8. The temperature at FL 80 is +6°C. What will the temperature be at FL 130 if the ICAO standard lapse rate is applied?
-6°C
0°C
-4°C
+2°C
9. The temperature at FL 110 is -5°C. What will the temperature be at FL 50 if the ICAO standard lapse rate is applied?
+7°C
0°C
+3°C
-3°C
10. If you are flying at FL 120 and the outside temperature is -2°C, at what altitude will the “freezing level” be?
FL 130
FL 90
FL 150
FL 110
11. In the lower part of the stratosphere the temperature
increases at first and decreases afterward
decreases with altitude
increases with altitude
is almost constant
12. What is the boundary layer between troposphere and stratosphere called?
Tropopause
Atmosphere
Stratosphere
Ionosphere
13. The average height of the tropopause at 50°N is about
8 km
11 km
16 km
14 km
14. The lowest assumed temperature in the ICAO Standard Atmosphere is
-273°C
-56.5°C
-44.7°C
-100°C
15. The troposphere is the
part of the atmosphere below the tropopause
part of the atmosphere above the stratosphere
boundary between the mesosphere and thermosphere
boundary between the stratosphere and the mesosphere
16. How would you characterise an air temperature of -55°C at the 200 hPa level over Western Europe?
Low
Very high
High
Within +/-5°C of ISA
17. Which one of the following statements applies to the tropopause?
It separates the troposphere from the stratosphere
It indicates a strong temperature lapse rate
It is, by definition, a temperature inversion
It is, by definition, an isothermal layer
18. A temperature of +15°C is recorded at an altitude of 500 metres above sea level. If the vertical temperature gradient is that of a standard atmosphere, what will the temperature be at the summit of a mountain, 2500 metres above sea level?
+4°C
-2°C
+2°C
0°C
19. If you are flying at FL 300 in an air mass that is 15°C warmer than a standard atmosphere, what is the outside temperature likely to be?
-15°C
-60°C
-45°C
-30°C
20. What is the approximate composition of the dry air by volume in the troposphere?
21 % oxygen, 78 % nitrogen, and the rest other gasses
88 % oxygen, 9 % nitrogen, and the rest other gasses
50 % oxygen, 40 % nitrogen, and the rest other gasses
10 % oxygen, 89 % nitrogen, and the rest other gasses
21. The 0°C isotherm is forecast to be at FL 50. At what FL would you expect a temperature of -6°C?
FL80
FL20
FL100
FL110
22. How would you characterise an air temperature of -30°C at the 300 hPa level over Western Europe?
High
Very low
Low
Within +/-5°C of ISA
23. The troposphere
is the separation layer between the stratosphere and atmosphere
has a greater vertical extent above the equator than above the poles
reaches the same height at all latitudes
contains all oxygen of the stratosphere
24. The temperature at FL 140 is -12°C. What will the temperature be at FL 110 if the ICAO standard lapse rate is applied?
-9°C.
-15°C.
-18°C.
-6°C.
25. Going from the equator to the North Pole, the altitude of the tropopause
increases and its temperature decreases
increases and its temperature increases
decreases and its temperature increases
decreases and its temperature decreases
26. What of the following is the most important constituent in the atmosphere from a weather stand-point?
Hydrogen
Oxygen
Water vapour
Nitrogen
27. What is the vertical temperature lapse rate, up to 11 km, in the ICAO standard atmosphere?
6.5°C per 1000 m
4.5°C per 1000 m
2°C per 1000 m
3°C per 1000 m
28. How does the height of the tropopause normally vary with latitude in the northern hemisphere?
It remains constant from north to south
It decreases from south to north
It increases from south to north
It remains constant throughout the year
29. The thickness of the troposphere varies with
rotation of the earth
latitude
longitude
the wind
30. An outside air temperature of -35°C is measured while cruising at FL 200. What is the temperature deviation from the ISA at this level?
10°C colder than ISA
5°C colder than ISA
10°C warmer than ISA
5°C warmer than ISA
31. The tropopause is a level at which
water vapour content is greatest
vertical currents are strongest
pressure remains constant
temperature ceases to fall with increasing height
32. The tropopause is lower
south of the equator than north of it
over the equator than over the South Pole
over the North Pole than over the equator
in summer than winter in moderate latitudes
33. Which layer of the atmosphere contains more than 90% of all water vapour?
Upper stratosphere
Troposphere
Ionosphere
Lower stratosphere
34. The height and the temperature of the tropopause are respectively in the order of
16 km and -75°C over the equator
16 km and -40°C over the poles
8 km and -40°C over the equator
8 km and - 75°C over the poles
35. What, approximately, is the average height of the tropopause over the equator?
40 km
16 km
11 km
8 km
36. Which statement is correct regarding the International Standard Atmosphere?
At MSL temperature is 15°C and pressure is 1013.25hPa
At MSL temperature is 10°C and the decrease in temperature with height is 1°C per 100m
At MSL temperature is 15°C and the decrease in temperature with height is 1°C per 100m
At MSL pressure is 1013.25 hPa and the decrease of temperature with height is 1°C per 100m
37. Which is true of the temperature at the tropopause?
There is no significant difference with change of latitude
It is higher in polar regions than in equatorial regions
It is highest in middle latitudes
It is higher in equatorial regions than in Polar Regions
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