Weather
Weather
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What is a characteristic of stable air?
A stable air mass is most likely to have which characteristic?
Convective circulation patterns associated with sea breezes are caused by
During a cross-country flight you picked up rime icing which you estimate is 1/2" thick on the leading edge of the wings. You are now below the clouds at 2,000' AGL and are approaching your destination airport under VFR. Visibility under the clouds is more than 10 miles, winds at the destination airport are 8 kts right down the runway, and the surface temperature is 3°C. You decide to:
What causes variations in altimeter settings between weather reporting points?
Which conditions result in the formation of frost?
Moist, stable air flowing upslope can be expected to
What are characteristics of a moist, unstable air mass?
Why is frost considered hazardous to flight?
The most frequent type of ground or surface based temperature inversion is that which is produced by
What cloud types would indicate convective turbulence?
Low-level turbulence can occur and icing can become hazardous in which type of fog?
In which situation is advection fog most likely to form?
One weather phenomenon which will always occur when flying across a front is a change in the
What feature is normally associated with the cumulus stage of a thunderstorm?
A temperature inversion would most likely result in which weather condition?
The presence of ice pellets at the surface is evidence that there
How will frost on the wings of an airplane effect takeoff performance?
Clouds are divided into four families according to their
What is the approximate base of the cumulus clouds if the surface air temperature at 1,000' MSL is 70°F and the dewpoint is 48°F?
Possible mountain wave turbulence could be anticipated when winds 40 kts or greater blow
Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
Thunderstorms reach their greatest intensity during the
Where does wind shear occur?
The conditions necessary for the formation of cumulonimbus clouds are a lifting action and
Crests of standing mountain waves may be marked by stationary, lens-shaped clouds known as
Which weather phenomenon is always associated with a thunderstorm?
How does frost affect the lifting surfaces of an airplane on takeoff?
Upon encountering severe turbulence, which flight condition should the pilot attempt to maintain?
What can be used to determine the stability of the atmosphere?
One of the most dangerous features of mountain waves is the turbulent areas in and
Steady precipitation preceding a front is an indication of
One in-flight condition necessary for structural icing to form is
A pilot can expect a wind-shear zone in a temperature inversion whenever the windspeed at 2,000' - 4,000' above surface is at least
What is meant by the term "dewpoint"?
The suffix "nimbus", used in naming clouds, means
What types of fog depend upon wind in order to exist?
What feature is associated with a temperature inversion?
What are the processes by which moisture is added to unsaturated air?
During the lift cycle of a thunderstorm, which stage is characterized predominately by downdrafts?
In which environment is aircraft structural ice most likely to have the highest accumulation rate?
The mature stage of a thunderstorm begins with
What conditions are necessary for the formation of thunderstorms?
Which is true with respect to a high- or low- pressure system?
What are characteristics of unstable air?
Which weather condition should be expected beneath a low-level temperature inversion layer when the relative humidity is high?
Moisture is added to air by
Every physical process of weather is accompanied by, or is the result of a
A nonfrontal, narrow band of active thunderstorms that often develop ahead of a cold front is known as a
An almond or lens-shaped cloud which appears stationary, but which may contain winds of 50 kts or more, is referred to as
Clouds, fog, or dew will always form when
At approximately what altitude above the surface would the pilot expect a base of cumuliform clouds if the surface air temperature is 82°F and the dewpoint is 38°F?
One of the most easily recognized discontinuities across a front is
What clouds have the greatest turbulence?
If the temperature/dewpoint spread is small and decreasing, and the temperature is 62°F, what time of weather is most likely to develop?
The wind at 5,000 AGL is southwesterly while the surface wind is southerly. This difference in direction is primarily due to
When may hazardous wind shear be expected?
If there is thunderstorm activity in the vicinity of an airport at which you plan to land, which hazardous atmospheric phenomenon might be expected on the landing approach?
If a temperature inversion is encountered immediately after takeoff or during an approach to a landing, a potential hazard exists due to
Thunderstorms which generally produce the most intense hazard to aircraft are
What situation is most conducive to the formation of radiation fog?
If an unstable air mass is forced upward, what type clouds can be expected?
The amount of water vapor which air can hold depends on the
What would decrease the stability of an air mass?