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37 Cards in this Set
- Front
- Back
The temperature to which air must be cooled to become saturated by water vapor already in the air is
A. relative humidity. B. dew point. C. lapse rate. |
dew point
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The standard lapse rate in the Troposphere is how many degrees per thousand feet?
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2 Celsius
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What force deflects air to the right in the Northern Hemisphere and to the left in the Southern Hemisphere?
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Coriolis Force
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When the temperature increases with an increase in altitude, this is known as a/an
A. lapse rate. B. isothermal layer. C. temperature inversion. |
temperature inversion
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Most weather occurs in which layer of the atmosphere?
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Troposphere
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What is the standard barometric pressure?
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29.92 inches of mercury
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What is a trough?
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An elongated area of low pressure.
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Which pressure system is likely to produce the most severe weather? Why?
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Low; Rising air is conducive to cloudiness, restricted visibilities, turbulence, and precipitation
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Where two different air masses meet is called a ______.
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front
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Clouds can give indications about what three things concerning the air around them?
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Upward motion, stability, and moisture
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Clouds with extensive vertical development include what two types?
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Towering Cumulus and Cumulonimbus
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What must air become before condensation or sublimation can occur?
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Saturated
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Which agency/office collects and analyzes meteorological and hydrological data, and subsequently prepares weather forecasts?
A. National Weather Service B. National Center of Environmental Prediction C. United States Weather Bureau D. Aviation Weather Center (AWC) |
National Weather Service
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The center responsible for issuing Area Forecasts, AIRMETs, and SIGMETs is the
A. Storm Prediction Center. B. Tropical Prediction Center. C. National Center Operation. D. Aviation Weather Center. |
Aviation Weather Center
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Providing forecast, weather consultation, and advice to managers is the role of the
A. Traffic Management Unit. B. Weather Forecast Office. C. Center Weather Service Unit. D. Storm Prediction Center. |
Center Weather Service Unit
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Terminal Aerodrome Forecast (TAF) and Transcribed Aviation Weather Broadcast (TWEB) are products produced by the
A. Aviation Weather Center. B. Weather Forecast Office. C. Storm Prediction Center. D. National Center of Operations. |
Weather Forecast Office
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Center Weather Service Units are located
A. at the Weather Forecast Office. B. adjacent to all Level 5 control towers. C. within all ARTCCs. D. within all AFSSs. |
within all ARTCCs
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Center Weather Service Units are a joint agency aviation weather support team composed of personnel from the NWS and
A. the DOD. B. FAA Traffic Management Unit. C. Flight Service Option. D. NOAA. |
FAA Traffic Management Unit
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The temperature to which air must be cooled to become saturated is called
A. lapse rate. B. dew point. C. standard saturation. D. inversion. |
dew point
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The atmospheric layer containing most of the Earth's weather is the
A. Mesophere. B. Stratosphere. C. Troposphere. D. Tropopause. |
Troposphere
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The standard lapse rate within the Troposphere is a 2-degree Celsius decrease in temperature with each increase of ____________ feet in altitude.
A. 2,000 B. 1,500 C. 1,000 D. 500 |
1,000
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The force that deflects air to the right in the Northern Hemisphere is called the ____________ force.
A. Northern B. Southern C. Gradient D. Coriolis |
Coriolis
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The wind circulation around an area of low pressure in the Northern Hemisphere is
A. clockwise and toward the center. B. clockwise and outward from the center. C. counterclockwise and toward the center. D. counterclockwise and outward from the center. |
counterclockwise and toward the center
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An elongated area of high pressure is called a/an
A. ridge. B. trough. C. front. D. air mass. |
ridge
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The Jet Stream is a narrow, high-speed river of wind found near the
A. Troposphere. B. Tropopause. C. Mesosphere. D. Exosphere. |
Tropopause
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An extensive body of air within which temperature and moisture in a horizontal plane are essentially the same is described as a/an
A. air mass. B. cold front. C. warm front. D. Jet Stream. |
air mass
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An air mass may be modified by
A. heating from above ONLY. B. cooling from below ONLY. C. heating or cooling from above. D. heating or cooling from below. |
heating or cooling from below
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Which characteristic is typical of a stable air mass?
A. Turbulence B. Smooth air C. Cumulus clouds D. Good visibility |
Smooth air
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When a cold front overtakes a warm front, a/an ____________ front is formed.
A. mixed B. moderate C. stationary D. occluded |
occluded
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A cloud type belonging to the low cloud family and occurring ONLY at the surface to 6,500 feet is
A. Altostratus. B. Cirrostratus. C. Cirrus. D. Stratus. |
Stratus
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What type of cloud has the prefix of nimbo or the suffix of nimbus?
A. Fragmented B. Convective C. Precipitation D. Fair weather |
Precipitation
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What cloud type frequently produces an anvil shape and is MOST hazardous to aviation?
A. Altocumulus B. Cumulonimbus C. Nimbostratus D. Cirrostratus |
Cumulonimbus
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Which of the following is NOT a form of precipitation?
A. Snow B. Fog C. Hail D. Drizzle |
Fog
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Convective currents are usually caused by
A. thunderstorms. B. thick fog. C. uneven heating of the Earth’s surface. D. sea breezes being forced up the side of a mountain. |
uneven heating of the Earth’s surface
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The “standard” surface temperature at sea level is considered to be ______ degrees Celsius (______ degrees Fahrenheit).
A. 13, 57 B. 14, 58 C. 15, 59 D. 16, 60 |
15, 59
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The “standard” surface pressure at sea level is considered to be ______ inches of mercury (______ millibars).
A. 29.90, 1013.2 B. 29.92, 1013.2 C. 29.95, 1015.3 D. 30.02, 1015.3 |
29.92, 1013.2
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In the standard atmosphere, the Troposphere is considered to extend from the surface of the Earth to approximately ________ feet.
A. 26,000 B. 30,000 C. 32,000 D. 36,000 |
36,000
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