Weather Theory QZ4 Flashcards
What are characteristics of a moist, unstable air mass?
1. Stratiform clouds and showery precipitation
2. Poor visibility and smooth air
3. Cumuliform clouds and showery precipitation
- Cumuliform clouds and showery precipitation
A stable air mass is most likely to have which characteristic?
1. Turbulent air
2. Showery precipitation
3. Poor surface visibility
- Poor surface visibility
What is a characteristic of stable air?
1. Stratiform clouds
2. Unlimited visibility
3. Cumulus clouds
- Stratiform clouds
What would decrease the stability of an air mass?
1. Cooling from below
2. Warming from below
3. Decrease in water vapor
- Warming from below
What feature is associated with a temperature inversion?
1. Chinook winds on mountain slopes
2. A stable layer of air
3. An unstable layer of air
- A stable layer of air
Which weather conditions should be expected beneath a low-level temperature inversion layer when the relative humidity is high?
1. Light wind shear, poor visibility, haze, and light rain
2. Smooth air, poor visibility, fog, haze, or low clouds
3. Turbulent air, poor visibility, fog, low stratus type clouds, and showery precipitation
- Smooth air, poor visibility, fog, haze, or low clouds
When warm, moist, stable air flows upslope, it
1. produces stratus type clouds
2. causes showers and thunderstorms
3. develops convective turbulence
- produces stratus type clouds
What measurement can be used to determine the stability of the atmosphere?
1. Atmospheric pressure.
2. Surface temperature.
3. Actual lapse rate.
- Actual lapse rate.
What is the approximate base of the cumulus clouds if the surface air temperature at 1,000 feet MSL is 70°F and the dewpoint is 48°F?
1. 5,000 feet MSL
2. 4,000 feet MSL
3. 6,000 feet MSL
- 6,000 feet MSL
What are characteristics of unstable air?
1. Nimbostratus clouds and good surface visibility
2. Turbulence and good surface visibility
3. Turbulence and poor surface visibility
- Turbulence and good surface visibility
The most frequent type of ground or surface-based temperature inversion is that which is produced by
1. warm air being lifted rapidly aloft in the vicinity of mountainous terrain
2. the movement of colder air under warm air, or the movement of warm air over cold air
3. terrestrial radiation on a clear, relatively still night
- terrestrial radiation on a clear, relatively still night
Steady precipitation preceding a front is an indication of
1. cumuliform clouds with little or no turbulence.
2. stratiform clouds with moderate turbulence.
3. stratiform clouds with little or no turbulence.
- stratiform clouds with little or no turbulence.
At approximately what altitude above the surface would the pilot expect the base of cumuliform clouds if the surface air temperature is 82°F and the dewpoint is 38°F?
1. 11,000 feet AGL
2. 9,000 feet AGL
3. 10,000 feet AGL
- 10,000 feet AGL
When there is a temperature inversion, you would expect to experience
1. clouds with extensive vertical development above an inversion aloft.
2. good visibility in the lower levels of the atmosphere and poor visibility above an inversion aloft.
3. an increase in temperature as altitude increases.
- an increase in temperature as altitude increases.
If an unstable air mass is forced upward, what type clouds can be expected?
1. Stratus clouds with considerable associated turbulence
2. Clouds with considerable vertical development and associated turbulence
3. Stratus clouds with little vertical development
- Clouds with considerable vertical development and associated turbulence
