PPL - Meteorology Flashcards
1
Q
- A stable air mass is most likely to have which characteristic?
A) Showery precipitation.
B) Poor surface visibility.
C) Turbulent air.
A
B) Poor surface visibility.
2
Q
- The suffix “nimbus,’’ used in naming clouds, means:
A) a rain cloud.
B) a cloud with extensive vertical development.
C) a middle cloud containing ice pellets.
A
A) a rain cloud.
3
Q
- Clouds are divided into four families according to their:
A) height range.
B) composition.
C) outward shape.
A
A) height range.
4
Q
- Crests of standing mountain waves may be marked by stationary, lensshaped clouds known as:
A) standing lenticular clouds.
B) roll clouds.
C) mammatocumulus clouds.
A
A) standing lenticular clouds.
5
Q
- What clouds have the greatest turbulence?
A) Nimbostratus.
B) Towering cumulus.
C) Cumulonimbus.
A
C) Cumulonimbus.
6
Q
- What cloud types would indicate convective turbulence?
A) Towering cumulus clouds.
B) Cirrus clouds.
C) Nimbostratus clouds.
A
A) Towering cumulus clouds.
7
Q
- Possible mountain wave turbulence could be anticipated when winds of
40 knots or greater blow:
A) parallel to a mountain peak, and the air is stable.
B) across a mountain ridge and the air is stable.
C) down a mountain valley and the air is unstable.
A
B) across a mountain ridge and the air is stable.
8
Q
- Every physical process of weather is accompanied by, or is the result of, a:
A) movement of air.
B) pressure differential.
C) heat exchange.
A
C) heat exchange.
9
Q
- What causes variations in altimeter settings between weather reporting points?
A) Unequal heating of the Earth’s surface.
B) Variation of terrain elevation.
C) Coriolis force.
A
A) Unequal heating of the Earth’s surface.
10
Q
- What measurement can be used to determine the stability of the atmosphere?
A) Actual lapse rate.
B) Atmospheric pressure.
C) Surface temperature.
A
A) Actual lapse rate
11
Q
- What would decrease the stability of an air mass?
A) Cooling from below.
B) Decrease in water vapor.
C) Warming from below.
A
C) Warming from below.
12
Q
- What is the characteristic of stable air?
A) Unlimited visibility.
B) Cumulus clouds.
C) Stratiform clouds.
A
C) Stratiform clouds.
13
Q
- Clouds, fog, or dew will always form when:
A) relative humidity reaches 100 percent.
B) water vapor is present.
C) water vapor condenses.
A
C) water vapor condenses.
14
Q
- The amount of water vapor which air can hold depends on the:
A) air temperature.
B) dew point.
C) stability of the air.
A
A) air temperature.
15
Q
- What are the processes by which moisture is added to unsaturated air?
A) Super saturation and evaporation.
B) Evaporation and sublimation.
C) Heating and condensation.
A
B) Evaporation and sublimation.
16
Q
- What is meant by the term ‘dewpoint’?
A) The temperature to which air must be cooled to become saturated.
B) The temperature at which dew will always form.
C) The temperature at which condensation and evaporation are equal.
A
A) The temperature to which air must be cooled to become saturated.