1 . The best defense against the hazards of low altitude windshear is:
Taking precautions before windshear is encountered.
Knowledge of standard operating techniques related to windshear.
The ability to perform specific recovery techniques in the event of an inadvertent
windshear encounter.
Avoidance.
Avoidance.
2 . Hazardous wind variations at low altitudes can result from:
All of the answers are correct.
Temperature inversions.
Frontal systems.
Thunderstorms.
All of the answers are correct.
3 . The most violent forms of wind change occur in the vicinity of:
Thunderstorms and rain showers.
Mountain waves.
Temperature inversions.
Sea breeze fronts.
Thunderstorms and rain showers.
4 . Airmass thunderstorms appear to be randomly distributed in unstable air and
develop from:
Converging winds.
Troughs aloft.
Changes in air temperature at high altitudes.
Localized heating at the earth's surface.
Localized heating at the earth's surface.
5 . What signals the beginning of the mature stage of an airmass thunderstorm?
, The appearance of an associated cold air gust front as a result of the downflow of rain-
cooled air.
The tops of the clouds rising to 15,000 feet or above.
The heated updraft creating the thunderstorm being cut off by rainfall.
Precipitation.
Precipitation.
6 . Compared to airmass thunderstorms, frontal thunderstorms are:
Less likely to be associated with gusty winds and tornadoes.
More severe.
Of shorter duration.
Less severe.
More severe.
7 . The downward moving column of air, or downdraft, of a typical thunderstorm is
about:
5 to 10 miles in diameter.
1 to 5 miles in diameter.
1/2 mile to 2 miles in diameter.
1/4 mile to 1 mile in diameter.
1 to 5 miles in diameter.
8 . The majority of documented windshear-associated accidents and incidents have
occurred in:
Eastern Asia.
The tropics.
The United States.
Europe.
The United States.
1 . Observations suggest that approximately what percentage of thunderstorms produce
a microburst?
40%.