Chapter 1 - The Atmosphere

The atmosphere consists of the following gases and their proportion (P.4):

• 78% Oxygen, 21% Nitrogen, 1% other gases

• 78% other gases, 21% Oxygen, 1% Nitrogen

• 78% Nitrogen, 21% other gases, 1% Oxygen

• 78% Nitrogen, 21% Oxygen, 1% other gases

The lowest layer of the earth's atmosphere is (P.5):

• Tropopause

• Stratosphere

• Troposphere

• Mesosphere

The Tropopause (P.5):

• is the boundary between the Troposphere and the Stratosphere

• is the boundary between the Troposphere and the Mesosphere

• is the boundary between the Troposphere and the Stratopause

• contains almost all the weather within the atmosphere

Which of the following statement is correct regarding the tropopause (P. 5)?

• the cooler the air, the higher the tropopause

• the higher the air temperature, the higher the tropopause

• the average height of the tropopause at the Equator is approximately 11km

• the height of the tropopause is controlled by humidity of the air near the surface

Which of the following is not a condition of the International Standard Atmosphere (ISA) is (P.6):

• a MSL temperature of +15°C

• a MSL pressure of 1013.25 hPa

• a MSL density of 1225g/m³

• a temperature lapse rate of 0.65°C / 1000 feet

The ISA temperature at 38,000 feet is:

• -56.5°F

• -56.5°C

• -61°C

• 56.5°C

The outside air temperature at 34,000 feet is -58°C, which means it is:

• ISA -10°C

• ISA +5°C

• ISA

• ISA -5°C

The outside air temperature at 32,000 feet is ISA -15°C. The temperature is:

• -49°C

• -64°C

• -56.5°C

• -51°C