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問題一覧
1
Which clouds have the greatest turbulence?
Cumulonimbus.
2
The boundary between two different air masses is referred to as a ?
Front.
3
When there is a temperature inversion, you would expect to experience?
An increase in temperature as altitude is increased.
4
One of the most easily recognized discontinuities across a front is?
A change in temperature.
5
What are the characteristics of stable air?
Poor visibility and steady precipitation.
6
What would decrease the stability of an air mass?
Warming from below.
7
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.
8
What is meant by the term “dewpoint”?
The temperature to which air must be cooled to become staturated.
9
Every phusical process of weather is accompanied by, or is the result of?
Heat exchange.
10
What causes variations in altimeter settings between weather reporting points?
Unequal heating of the Earth’s surface.
11
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.
12
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.
13
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.
14
Steady precipitation preceding a front is an indication of?
Stratiform clouds with little or not turbulence.
15
Some of the characterisitics you would expect to see with an unstable air mass are.
Turbulence and good surface visibility.
16
What are the characteristics of a moist, unstable air mass?
Turbulence and shower precipitation.
17
A Characteristic you would expect to see with a stable air mass is?
Poor surface visibility.
18
What measurement can be used. To determine the stability of the atmosphere?
Actual lapse rate.
19
What are the characteristics of an unstable atmosphere?
A warm, humid air mass.
20
The suffix “Numbus,” used in naming clouds, means?
A rain cloud.
21
Which will produce the least favorable conditions for the operation of a small UA?
Warm, moist air.
22
Clouds, fog, or dew will always form when?
Water vapor condenses.
23
The passage of which type of front poses the highest risk to small UA operations?
Cold front.
24
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.