Exan 2 Flashcards
What causes variations in altimeter setting between weather reporting points?
A. Unequal heating of the Earths surface.
B. Variation of terrain elevation.
C. Coriolis Force
A. Unequal heating if the earths surface.
The wind at 5,000 feet AGL is southeasterly while the surface wind in southerly. This difference in direction is primarily due to
A. Stronger pressure gradient at higher altitudes
B. Frictions between the wind and the surface.
C. Stringer Coriolis Force at the surface
B. Frictions between the wind and the surface.
Convective circulation patterns associated with sea breezes are caused by
A. Warm, dense she moving inland from over the water.
B. Water absorbing and radiating hear faster than the land.
C. Cool, dense air moving inland from over the water
C. Cool, dense air moving inland from over the water
Every physical process of weather is accompanied by, or is the result of, a
A. Movement of air.
B. Pressure differential
C. Heat exchange
C. Heat exchange
The most frequent type of ground or surface-based temperature inversion is that which produced by.
A. Terrestrial radiation on a clear, relatively still night.
B. Warm air being lifted rapidly aloft in the vicinity of mountainous terrain.
C. The movement of colder air under warm air, or the movement of warm air over cold air.
A. Terrestrial radiation on a clear, relatively still night.
What is meant by the term “dewpoint”?
A. The temperature at which condensation and evaporation are equal.
B. The temperature at which dew will always form.
C. The temperature to which air must be cooled to become saturated.
C. The temperature to which air must be cooled to become saturated.
Clouds, fog, or dew will always form when
A. Water vapor condenses
B. Water vapor is present
C. Relative humidity reaches 100 percent
A. Water vapor condenses
The presence of ice pellets at the surface is evidence that there
A. Are thunderstorms in the area.
B. Has been cold frontal passage.
C. Is a temperature inversion with freezing rain at a higher altitude.
C. Is a temperature inversion with freezing rain at a higher altitude.
What would decrease the stability of an air mass?
A. Warming from below.
B. Cooling from below
C. Decrease in water vapor
A. Warming from below.
Moist, stable air flowing upslope can be expect to
A. Produce stratus type clouds
B. Cause showers and thunderstorms
C. Develop connective turbulence
A. Produce stratus type clouds
What feature is associated with a temperature inversion?
A. A stable layer of air.
B. An unstable layer of air.
C. Chinook winds on mountain slopes
A. A stable layer of air.
At approximately what altitude above the surface would the pilot expect the base of cumuliform clouds if the surface air temperature is 82 degrees F and the dewpoint is 38 degrees F?
A. 9,000 feet AGL.
B. 10,000 feet AGL
C. 11,000 feet AGL
B. 10,000 feet AGL
What are the characteristics of a moist, unstable air mass?
A. Cumuliform clouds and showery precipitation.
B. Poor visibility and smooth air.
C. Stratified clouds and showery precipitation.
A. Cumuliform clouds and showery precipitation.
Clouds are divided into four families according to their
A. Outward shape
B. Height range
C. Composition
B. Height range
One weather phenomenon which will always occur when flying across a front is a change in the
A. Wind directions
B. Type of precipitation
C. Stability of the air mass
A. Wind direction
What types of fog depending upon wind in order to exist?
A. Radiation fog and ice fog.
B. Steam fog and ground fog
C. Advection fog and upslope fog.
C. Advection fog and upslope fog.
For aviation purposes, ceiling is defined as the height above the Earth’s surface of the
A. Lowest reported obscurantism and highest layer of clouds reported as overcast
B. Lowest broken or overcast layer or vertical visibility into an obscuration.
C. Lowest layer of clouds reported as scattered, broken, or thin.
B. Lowest broken or overcast layer or vertical visibility into an obscuration.
From which primary course should information be obtained regarding expected weather at the estimated time of arrival if your destination has not Terminal Forecast?
A. Low-Level Prognostic Chart
B. Weather Depiction Chart
C. Area Forecast
C. Area forecast
To best determine general forecast weather conditions over several states, the pilot should refer to
A. Aviation Area Forecast
B. Weather Depiction Charts
C. Satellite weather pictures.
A. Aviation Area Forecast
For a forecast of visual meteorological conditions(VMC), clouds, and general weather conditions over an area the size of several states, the pilot should refer to the
A. Weather depiction chart
B. Aviation area forecast
C. Radar summery chart.
B. Aviation area forecast
What is indicated when a current CONVECTIVE SIGNET forecasts thunderstorms?
A. Moderate thunderstorms covering 30 percent of the area.
B. Moderate or severe turbulence.
C. Thunderstorms obscured by massive cloud layers
C. Thunderstorms obscured by massive cloud layers
SIGMETS are issued as a warning of weather conditions hazardous to which aircraft?
A. Small aircraft only
B. Large aircraft only
C. All aircraft
C. All aircraft
What are values are used for Winds Aloft Forecasts
A. Magnetic direction and knots.
B. Magnetic direction and miles per hour.
C. True direction and knots.
C. True direction and knots.
When the term “light and variable” is used in reference to a Winds Aloft Forecast, the coded group and wind-speed is
A. 0000 and less than 7 knots
B. 9900 and less than 5 knots.
C. 9999 and less than 10 knots
B. 9900 and less than 5 knots.
