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37 Cards in this Set

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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
The standard lapse rate in the Troposphere is how many degrees per thousand feet?
2 Celsius
What force deflects air to the right in the Northern Hemisphere and to the left in the Southern Hemisphere?
Coriolis Force
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
Most weather occurs in which layer of the atmosphere?
Troposphere
What is the standard barometric pressure?
29.92 inches of mercury
What is a trough?
An elongated area of low pressure.
Which pressure system is likely to produce the most severe weather? Why?
Low; Rising air is conducive to cloudiness, restricted visibilities, turbulence, and precipitation
Where two different air masses meet is called a ______.
front
Clouds can give indications about what three things concerning the air around them?
Upward motion, stability, and moisture
Clouds with extensive vertical development include what two types?
Towering Cumulus and Cumulonimbus
What must air become before condensation or sublimation can occur?
Saturated
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
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
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
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
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
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
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
The atmospheric layer containing most of the Earth's weather is the

A. Mesophere.
B. Stratosphere.
C. Troposphere.
D. Tropopause.
Troposphere
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
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
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
An elongated area of high pressure is called a/an

A. ridge.
B. trough.
C. front.
D. air mass.
ridge
The Jet Stream is a narrow, high-speed river of wind found near the

A. Troposphere.
B. Tropopause.
C. Mesosphere.
D. Exosphere.
Tropopause
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
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
Which characteristic is typical of a stable air mass?

A. Turbulence
B. Smooth air
C. Cumulus clouds
D. Good visibility
Smooth air
When a cold front overtakes a warm front, a/an ____________ front is formed.

A. mixed
B. moderate
C. stationary
D. occluded
occluded
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
What type of cloud has the prefix of nimbo or the suffix of nimbus?

A. Fragmented
B. Convective
C. Precipitation
D. Fair weather
Precipitation
What cloud type frequently produces an anvil shape and is MOST hazardous to aviation?

A. Altocumulus
B. Cumulonimbus
C. Nimbostratus
D. Cirrostratus
Cumulonimbus
Which of the following is NOT a form of precipitation?

A. Snow
B. Fog
C. Hail
D. Drizzle
Fog
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
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
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
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