Fundamentals Of Weather And Aviation Weather Services (Atb-25)

Front 1

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.

Back 1

dew point

Front 2

The standard lapse rate in the Troposphere is how many degrees per thousand feet?

Back 2

2 Celsius

Front 3

What force deflects air to the right in the Northern Hemisphere and to the left in the Southern Hemisphere?

Back 3

Coriolis Force

Front 4

When the temperature increases with an increase in altitude, this is known as a/an

A. lapse rate.
B. isothermal layer.
C. temperature inversion.

Back 4

temperature inversion

Front 5

Most weather occurs in which layer of the atmosphere?

Back 5

Troposphere

Front 6

What is the standard barometric pressure?

Back 6

29.92 inches of mercury

Front 7

What is a trough?

Back 7

An elongated area of low pressure.

Front 8

Which pressure system is likely to produce the most severe weather? Why?

Back 8

Low; Rising air is conducive to cloudiness, restricted visibilities, turbulence, and precipitation

Front 9

Where two different air masses meet is called a ______.

Back 9

front

Front 10

Clouds can give indications about what three things concerning the air around them?

Back 10

Upward motion, stability, and moisture

Front 11

Clouds with extensive vertical development include what two types?

Back 11

Towering Cumulus and Cumulonimbus

Front 12

What must air become before condensation or sublimation can occur?

Back 12

Saturated

Front 13

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)

Back 13

National Weather Service

Front 14

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.

Back 14

Aviation Weather Center

Front 15

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.

Back 15

Center Weather Service Unit

Front 16

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.

Back 16

Weather Forecast Office

Front 17

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.

Back 17

within all ARTCCs

Front 18

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.

Back 18

FAA Traffic Management Unit

Front 19

The temperature to which air must be cooled to become saturated is called

A. lapse rate.
B. dew point.
C. standard saturation.
D. inversion.

Back 19

dew point

Front 20

The atmospheric layer containing most of the Earth's weather is the

A. Mesophere.
B. Stratosphere.
C. Troposphere.
D. Tropopause.

Back 20

Troposphere

Front 21

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

Back 21

1,000

Front 22

The force that deflects air to the right in the Northern Hemisphere is called the ____________ force.

A. Northern
B. Southern
C. Gradient
D. Coriolis

Back 22

Coriolis

Front 23

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.

Back 23

counterclockwise and toward the center

Front 24

An elongated area of high pressure is called a/an

A. ridge.
B. trough.
C. front.
D. air mass.

Back 24

ridge

Front 25

The Jet Stream is a narrow, high-speed river of wind found near the

A. Troposphere.
B. Tropopause.
C. Mesosphere.
D. Exosphere.

Back 25

Tropopause

Front 26

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.

Back 26

air mass

Front 27

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.

Back 27

heating or cooling from below

Front 28

Which characteristic is typical of a stable air mass?

A. Turbulence
B. Smooth air
C. Cumulus clouds
D. Good visibility

Back 28

Smooth air

Front 29

When a cold front overtakes a warm front, a/an ____________ front is formed.

A. mixed
B. moderate
C. stationary
D. occluded

Back 29

occluded

Front 30

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.

Back 30

Stratus

Front 31

What type of cloud has the prefix of nimbo or the suffix of nimbus?

A. Fragmented
B. Convective
C. Precipitation
D. Fair weather

Back 31

Precipitation

Front 32

What cloud type frequently produces an anvil shape and is MOST hazardous to aviation?

A. Altocumulus
B. Cumulonimbus
C. Nimbostratus
D. Cirrostratus

Back 32

Cumulonimbus

Front 33

Which of the following is NOT a form of precipitation?

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

Back 33

Fog

Front 34

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.

Back 34

uneven heating of the Earth’s surface

Front 35

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

Back 35

15, 59

Front 36

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

Back 36

29.92, 1013.2

Front 37

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

Back 37

36,000