記憶度
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1
A Characteristic you would expect to see with a stable air mass is?
Poor surface visibility.
2
A weather report indicates you can expect a low-level temperature inversion with high relative humidity. What weather conditions would you expect?
Smoothe air, poor visibility, fog, haze, or low clouds.
3
Which will produce the least favorable conditions for the operation of a small UA?
Warm, moist air.
4
What are the characteristics of a moist, unstable air mass?
Turbulence and shower precipitation.
5
If the temperature/dewpoint spread is small and decreasing, and the temperature is 62 degrees Fahrenheit, what type weather is most likely to develop?
Fog or low clouds.
6
What causes variations in altimeter settings between weather reporting points?
Unequal heating of the Earth’s surface.
7
What would decrease the stability of an air mass?
Warming from below.
8
When there is a temperature inversion, you would expect to experience?
An increase in temperature as altitude is increased.
9
What is meant by the term “dewpoint”?
The temperature to which air must be cooled to become staturated.
10
What are the characteristics of stable air?
Poor visibility and steady precipitation.
11
One of the most easily recognized discontinuities across a front is?
A change in temperature.
12
Which clouds have the greatest turbulence?
Cumulonimbus.
13
At approximately what altitude above the surface would you expect the base of cumuliform clouds if the surface air temperature is 33 degrees Celsius and the dewpoint is 15 degrees Celsius?
7,200ft AGL.
14
Clouds, fog, or dew will always form when?
Water vapor condenses.
15
The suffix “Numbus,” used in naming clouds, means?
A rain cloud.
16
Steady precipitation preceding a front is an indication of?
Stratiform clouds with little or not turbulence.
17
At approximately what altitude above the surface would you expect the base of cumuliform clouds if the surface air temperature is 77 degrees Fahrenheit and the dewpoint is 53 degrees Fahrenheit?
5,000ft AGL.
18
Which weather conditions should be expected beneath a low-level temperature inversion layer when the relative humidity is high?
Smooth air, poor visibility, fog haze, or low clouds.
19
Every phusical process of weather is accompanied by, or is the result of?
Heat exchange.
20
Some of the characterisitics you would expect to see with an unstable air mass are.
Turbulence and good surface visibility.
21
The passage of which type of front poses the highest risk to small UA operations?
Cold front.
22
What are the characteristics of an unstable atmosphere?
A warm, humid air mass.
23
What measurement can be used. To determine the stability of the atmosphere?
Actual lapse rate.
24
The boundary between two different air masses is referred to as a ?
Front.