Aviation Weather - Final Exam / Revised Questions and Answers / Sure A +
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Course
Aviation Weather
Institution
Aviation Weather
The most frequent type of ground or surface-based temperature inversion is that which is produced
by - Terrestrial radiation on a clear, relatively still night
Crests of standing mountain waves may be marked by stationary, lens-shaped clouds known as -
Standing lenticular clouds
Which weather c...
Aviation Weather - Final Exam / Revised Questions and Answers / Sure A + The most frequent type of ground or surface -based temperature inversion is that which is produced by - ✔✔Terrestrial radiation on a clear, relatively still night Crests of standing mountain waves may be marked by stationary, lens -shaped clouds known as - ✔✔Standing lenticular clouds 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 If the temperature/dewpoint spread is small and decreasing, and the temperature is 62 degrees F, what type of weather is most likely to develp? - ✔✔Fog or low clouds Where does wind shear occur? - ✔✔At all altitudes, in all directions A pilot can expect a wind -shear zone in a temperature inversion whenever the wind speed at 2,000 to 4,000 feet above the surface is at least - ✔✔25 knots The wind at 5,000 feet AGL is southwesterly while the surface wind is southerly. This difference in direction is primarily due to - ✔✔Friction between the wind and the surface Which weather phenomenon is always associated with a thunderstorm? - ✔✔Lightning An almond or lens -shaped cloud which appears stationary, but which may contain winds of 50 knots or more, is referred to as - ✔✔A lenticular cloud Possible mountain wave turbulence could be anticipated when winds of 40 knots or greater blow - ✔✔Across a mountain ridge, and the air is stable Which weather phenomenon signals the beginning of the mature stage of a thunderstorm? - ✔✔Precipitation beginning to fall What feature is normally associated with the cumulus stage of a thunderstorm? - ✔✔Continuous updraft What cloud types would indicate convective turbulence - ✔✔Towering cumulus clouds Why is frost considered hazardous to flight? - ✔✔Frost spoils the smooth flow of air over the wings, thereby decreasing lifting capability In which environment is aircraft structural ice most likely to have the highest accumulation rate? - ✔✔Freezing rain If an unstable air mass is forced upward, what type clouds can be expected? - ✔✔Clouds with considerable vertical development and associated turbulence The mature stage of a thunderstorm begins with - ✔✔The start of precipitation Thunderstorms which generally produce the most intense hazard to aircraft are - ✔✔Squall line thunderstorms Steady precipitation preceding a front is an indication of - ✔✔Stratiform clouds with little or no turbulence What causes variations in altimeter settings between weather reporting points? - ✔✔Unequal heating of Earth's surface What conditions are necessary for the formation of thunderstorms? - ✔✔High humidity, lifting force, and unstable conditions Clouds, fog, or dew will always form when - ✔✔Water vapor condenses
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