Question 1

What is the primary cause of wind circulation on Earth?

Accepted Answer

Heating of the Earth's surface by the sun

Answer

Gravity

Answer

Earth's rotation

Answer

Atmospheric pressure

Question 2

What type of wind is produced in the circulation cell between 60° and 30° north latitude?

Accepted Answer

Prevailing westerlies

Answer

Subtropical jet stream

Answer

Polar easterlies

Answer

Northeast trade winds

Question 3

What is the main factor affecting surface winds?

Accepted Answer

Surface friction

Answer

Coriolis force

Answer

Pressure gradient

Answer

Jet stream

Question 4

What type of breeze occurs during the day when the land heats more rapidly than the water?

Accepted Answer

Sea breeze

Answer

Mountain breeze

Answer

Valley breeze

Answer

Land breeze

Question 5

What is a katabatic wind?

Accepted Answer

A wind blowing down a slope at night

Answer

A wind blowing up a slope during the day

Answer

A wind caused by the rotation of the Earth

Answer

A wind associated with thunderstorms

Question 6

What type of cloud forms in the wave crests of a mountain wave?

Accepted Answer

Lenticular clouds

Answer

Cap clouds

Answer

Rotor clouds

Answer

Stratocumulus clouds

Question 7

What is the primary hazard of mountain waves for pilots?

Accepted Answer

Vertical currents and downdrafts

Answer

High temperatures

Answer

Gusty winds

Answer

Poor visibility

Question 8

What is a squall?

Accepted Answer

A sudden increase in wind strength of longer duration than a gust

Answer

A localized whirlwind

Answer

A sudden increase in wind strength of short duration

Answer

A type of jet stream turbulence

Question 9

What happens to surface winds during the day compared to at night?

Accepted Answer

They increase in speed and veer in direction

Answer

They remain constant

Answer

They decrease in speed and back in direction

Answer

They blow parallel to the isobars

Question 10

What is the primary cause of dust devils?

Accepted Answer

Unequal heating of the Earth's surface

Answer

Jet stream turbulence

Answer

Strong winds over mountains

Answer

Frontal activity

Question 11

What is the direction of wind reported in aviation weather reports?

Accepted Answer

Degrees true

Answer

Compass points

Answer

Degrees magnetic

Answer

Relative to the aircraft's heading

Question 12

What is wind shear?

Accepted Answer

A sudden change in wind speed or direction

Answer

A steady increase in wind speed

Answer

A type of jet stream turbulence

Answer

A localized whirlwind

Question 13

Where is clear air turbulence (CAT) most likely to occur?

Accepted Answer

Above and below the central core of the jet stream

Answer

Near the Earth's surface

Answer

In the core of the jet stream

Answer

In the polar easterlies

Question 14

What is the dry adiabatic lapse rate?

Accepted Answer

3°C per 1,000 feet

Answer

5°C per 1,000 feet

Answer

2°C per 1,000 feet

Answer

1.5°C per 1,000 feet

Question 15

What is the temperature to which unsaturated air must be cooled to become saturated?

Accepted Answer

Dewpoint

Answer

Lapse rate

Answer

Relative humidity

Answer

Absolute humidity

Question 16

What type of clouds are associated with unstable air?

Accepted Answer

Cumulus or cumulonimbus clouds

Answer

Cirrus clouds

Answer

Stratus clouds

Answer

Lenticular clouds

Question 17

What lifting agent is caused by air moving up a sloping terrain?

Accepted Answer

Orographic lift

Answer

Convergence

Answer

Convection

Answer

Frontal lift

Question 18

What is the freezing point on the Celsius scale?

Accepted Answer

0°C

Answer

100°C

Answer

-273°C

Answer

32°C

Question 19

What is the Kelvin equivalent of 0°C?

Accepted Answer

273.15 Kelvin

Answer

32 Kelvin

Answer

100 Kelvin

Answer

0 Kelvin

Question 20

What is the primary cause of contrails?

Accepted Answer

Condensation of water vapor in engine exhaust

Answer

Unequal heating of the Earth's surface

Answer

Rarefaction of air in wing tip vortices

Answer

Friction between the air and the ground

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