FAA PPL Test Prep: Ch. 7 (2 of 2): Weather Services Questions

What feature is normally associated with the cumulus stage of a thunderstorm?
A. Role cloud
B. Continuous updraft
C. Frequent lightning

B

Thunderstorms which generally produce the most intense hazard to aircraft are
A. Squall line thunderstorms
B. Steady state thunderstorms
C. Warm front thunderstorms

A

Which weather phenomenon is always associated with a thunderstorm?
A. Lightning
B. Heavy rain
C. Hail

A

The mature stage of a thunderstorm begins with
A. Formation of the anvil top
B. The start of precipitation
C. Continuous downdrafts

B

The destination airport has one runway, 8-26 and the winds calm. The normal approach in calm wind is a left-hand pattern to runway 8. There is no other traffic at the airport. A thunderstorm about 6 miles west is beginning its mature stage, and rain is starting to reach the ground. The pilot decides to
A. Fly the pattern to runway 8 since the storm is too far away to affect the wind at the airport
B. Fly the normal pattern to runway 8 since the storm is west and moving north and any unexpected wind will be from the east or southeast toward the storm.
C. Fly an approach to runway 26 since any unexpected wind due to the south will be westerly.

C.

One in-flight condition necessary for structural icing to form is
A. A small temperature/dewpoint spread
B. Stratiform clouds
C. Visible moisture

C

Every physical process of weather is accompanied by, or is a result of a
A. Movement of air
B. Pressure differential
C. Heat exchange

C

What causes variations in altimeter settings between weather reporting points?
A. Unequal heating of the earth's surface
B. Variation of terrain elevation
C. Coriolis force

A

The wind at 5000 feet AGL is southwesterly while the surface wind is southerly. This difference in direction is primarily due to
A. Stronger pressure Gradient at higher altitudes
B. Friction between the wind and the surface
C. Stronger Coriolis force at the surface

B

The development of the thermals depends upon
A. A counterclockwise circular rotation of air
B. Temperature inversions
C. Solar heating

C

Convective circulation patterns association with sea breeze are caused by
A. Warm dense air moving inland from over the water
B. Water absorbing the radiating heat faster than the land
C. Cool, dence air moving inland from over the water

C

The boundary point between two different air masses is
A. Frontolysis
B. Frontogenesis
C. Front

C

One weather phenomenon which will always occur when flying across front is a change in the
A. Wind direction
B. Type of perception
C. Stability of the air mass

A

One of the most easily recognized discontinuities across a front is
A. A change in temperature
B. An increase in cloud coverage
C. An increase in relative humidity

A

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?
A. Precipitation static
B. Wind-shear turbulence
C. Steady rain

B

A nonfrontal, narrow band of active thunderstorms that often develop ahead of a cold front is known as a
A. Prefrontal system
B. Squall line
C. Dry line

B

What conditions are necessary for the formation of thunderstorms?
A. High humidity, lifting force, and unstable conditions
B. High humidity, high temperatures, and cumulus clouds
C. Lifting force, moist air, and extensive cloud cover

A

During the life cycle of a thunderstorm, which stage is characterized predominantly by downdrafts?
A. Cumulus
B. Dissipating
C. Mature

B

Thunderstorms reach their greatest intensity during the
A. Mature stage
B. Downdraft stage
C. Cumulus stage

A

Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
A. The appearance of an anvil top
B. Precipitation beginning to fall
C. Maximum growth rate of the clouds

B

In which environment is aircraft structural ice most likely to have the highest accumulation rate?
A. Cumulus clouds with below freezing temperatures
B. Freezing drizzle
C. Freezing rain

C

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

An almond or lens shaped cloud which appears stationary but which may contain winds of 50 knots or more is referred to as
A. An inactive frontal cloud
B. A funnel cloud
C. A lenticular cloud

C

Crests of standing mountain waves may be marked stationary lens shaped clouds known as
A. Mammatocumulus clouds
B. Standing lenticular clouds
C. Roll clouds

B

Possible mountain wave turbulence could be anticipated when winds are 40 knots or greater blow
A. Across a mountain ridge and the air is stable
B. Down a mountain valley and the air is unstable
C. Parallel to a mountain peak and the air is stable

A

Where does wind shear occur?
A. Only at higher altitudes
B. Only at lower altitudes
C. At all altitudes in all directions

C

A pilot can expect a wind shear zone in a temperature inversion whenever the wind speed at 2000 to 4000 feet above the surface is at least
A. 10 knots
B. 15 knots
C. 25 knots

C

When may hazardous wind shear be expected
A. When stable air crosses a mountain barrier where it tends to flow in layers forming lenticular clouds.
B. In areas of low level temperature inversion frontal zones and clear air turbulence
C. Following frontal passage when stratocumulus clouds form indicating mechanical mixing

B

If the temperature/dewpoint is spread is small and decreasing and the temperature is 62F what type of weather is most likely to develop?
A. Freezing precipitation
B. Thunderstorms
C. Fog or low clouds

C

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 amount of water vapor which air can hold depends on the
A. Dewpoint
B. Air temperature
C. Stability of the air

B

What are the processes by which moisture is added to unsaturated air?
A. Evaporation and sublimation
B. Heating and condensation
C. Supersaturation and evaporation

A

Which conditions result in the formation of frost?
A. The temperature of the collecting surface is at or below freezing when small droplets of moisture fall on the surface
B. The temperature of the collecting surface is at or below the dewpoint of the adjacent air and the dewpoint is below freezing
C. The temperature of the surrounding air is at or below freezing when small drops of moisture fall on the collecting surface

B

Clouds, fog, or dew will always form when
A. Water vapor condolences
B. Water vapor is present
C. Relative humidity reaches 100 percent

A

Low level turbulence can occur and icing can become hazardous in which type of fog?
A. Rain-induced fog
B. Upslope fog
C. Steam fog

C

In which situation is advection fog most likely to form
A. A warm, moist air mass on the windward side of the mountains
B. An air mass moving inland from the coast in winter
C. A light breeze blowing colder air out to sea

B

What situation is the most conductive to the formation of radiation fog?
A. Warm, moist air over low, flatland areas on clear, calm nights
B. Moist, tropical air moving over cold, offshore water
C. The movement of cold ait over much warmer water

A

What types of fog depend 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