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Cloud seeding can sometimes be used to disperse fog.

A) True
B) False

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All of the following are necessary ingredients for cloud formation EXCEPT:


A) warm surface air temperatures.
B) rising,cooling air.
C) high moisture content.
D) condensation nuclei.

E) All of the above
F) C) and D)

Correct Answer

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It is difficult to distinguish between cloud droplets and raindrops on a radar image,because the radar wavelengths are reflected by both of them.

A) True
B) False

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A cumulus cloud is recognized mainly by its:


A) obvious vertical dimension.
B) darkness or color.
C) association with high winds.
D) layered structure.
E) precipitation.

F) B) and D)
G) A) and D)

Correct Answer

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The Bergeron process is associated with supercooled clouds.

A) True
B) False

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The Bergeron process may result in snow or rain.

A) True
B) False

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Clouds are named by their height and water content.

A) True
B) False

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When warm moist air moves over a cold surface,________ fog may result.


A) steam
B) advection
C) radiation
D) precipitation
E) upslope

F) C) and D)
G) None of the above

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Frost is an example of ________.

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Which type of fog occurs during nights when skies are clear and relative humidity is high?


A) radiation fog
B) evaporation fog
C) advection fog
D) steam fog

E) A) and B)
F) B) and D)

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A halo around the Sun is associated with an altocumulus cloud.

A) True
B) False

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Freezing rain and sleet are both the same form of precipitation.

A) True
B) False

Correct Answer

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Clouds,dew and frost all form because air has become saturated.This condition of saturation is usually caused by:


A) a temperature increase.
B) lack of convective mixing.
C) adding water vapor.
D) the air being cooled.
E) an abundance of condensation nuclei.

F) B) and E)
G) C) and E)

Correct Answer

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Most of the precipitation that falls in the middle latitudes is formed by:


A) the Bergeron process.
B) collision-coalescence.
C) spontaneous freezing of water droplets in the absence of condensation nuclei.
D) condensation of water vapor.

E) A) and D)
F) A) and C)

Correct Answer

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What measurement does radar provide concerning clouds and precipitation?

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Radar can measure the intensit...

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Frost prevention by air mixing requires that a temperature inversion be present in the air layer near the ground.

A) True
B) False

Correct Answer

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Fog is simply a cloud with a base at or near the ground.

A) True
B) False

Correct Answer

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Cumulus clouds can develop as a consequence of local convection.

A) True
B) False

Correct Answer

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The cloud form that is best described as sheets or layers that cover much or all of the sky is termed:


A) cirrus.
B) mackerel sky.
C) alto.
D) cumulus.
E) stratus.

F) A) and D)
G) A) and E)

Correct Answer

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Accurate measurement of precipitation is limited by the effects of the wind.

A) True
B) False

Correct Answer

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