AS200 Chap 2 Test Review

What accounts for 78 percent of the atmosphere's gases?

• argon

• carbon dioxide

• nitrogen

• oxygen

In which layer of the atmosphere does most weather take place?

• exosphere

• stratosphere

• thermosphere

• troposphere

What is the process called when a gas changes to a solid without going through the liquid state?

• condensation

• deposition

• evaporation

• sublimation

What does it mean if the relative humidity is 65 percent?

• The skin’s viscosity traps 65 percent of the air’s humidity onto the skin.

• The air is holding 65 percent of the total amount of moisture that it is capable of holding at that temperature and pressure.

• The humidity inside an aircraft’s cabin is 65 percent of what the humidity is outside of the aircraft.

• It’s a way of describing how people perceive air moisture.

Why is particulate matter necessary to the formation of raindrops?

• Particulate matter acts as the nucleus of the raindrop.

• Particulate matter provides a surface for cold air to create condensation, the source of raindrops

• Water molecules bounce against particulate matter, forcing them to bond with one another, and thus create water vapor and then raindrops.

• Particulate matter impacts the density of the air; the more dense the air, the heavier the water molecules. This is the source of water vapor raindrops

What type of cloud can make visibility difficult?

• low clouds

• middle clouds

• high clouds

• cumulonimbus clouds

In which atmospheric layer do most flights occur?

• exosphere

• stratosphere

• thermosphere

• troposphere

What cabin altitude is required by government regulations?

• 2,000 ft.

• 4,000 ft.

• 6,000 ft.

• 8,000 ft.

Example of a low cloud

• Wind shear

• Cumulus

• Stratus

• Altostratus

• Sublimation

Clouds with lots of vertical development

• Wind shear

• Cumulus

• Stratus

• Altostratus

• Sublimation