Question 1

Clouds which have extensive vertical dimensions are often classified as:

Accepted Answer

A)  cirrus.
B)  very thin.
C)  nimbus.
D)  lenticularis.
E)  cumulus.F) B) and D)
G) A) and B)

Question 2

Which of these is a mid-level cloud?

Accepted Answer

A)  stratocumulus
B)  altostratus
C)  cumulus
D)  cirrus
E)  stratusF) B) and D)
G) B) and C)

Question 3

Who first created the cloud classification system on which our modern system is based?

Accepted Answer

A)  Benjamin Franklin
B)  Luke Howard
C)  Tor Bergeron
D)  Andrew EllisE) A) and B)
F) A) and C)

Question 4

A cloud that forms liquid droplets has a relative humidity of 100 percent with respect to the liquid droplets.If temperature is <0°C and ice crystals form in this cloud,the relative humidity will be ________ with respect to the ice crystals.

Accepted Answer

A)  100 percent
B)  less that 100 percent
C)  more than 100 percent
D)  0 percentE) B) and D)
F) B) and C)

Question 5

Graupel forms when rime collects on ice crystals in a cloud.

Accepted Answer

A) True 
 B)False

Question 6

A radiation fog requires which of the following in order to form?

Accepted Answer

A)  a warm body of water and a cold breeze
B)  cold air moving up a slope
C)  high relative humidity and clear nighttime skies
D)  warm air moving over a cold surfaceE) C) and D)
F) All of the above

Question 7

The largest hailstone ever recorded in the United States weighed over 5 pounds.

Accepted Answer

A) True 
 B)False

Question 8

Successful dispersal of fog by seeding is limited to supercooled fog.

Accepted Answer

A) True 
 B)False

Question 9

The growth of a hailstone usually involves everything EXCEPT:

Accepted Answer

A)  spontaneous freezing of large water droplets.
B)  being carried several times into the frozen region of the cloud by updrafts.
C)  ice pellets encountering supercooled water droplets.
D)  the development of alternating layers of clear and cloudy ice.E) C) and D)
F) B) and D)

Question 10

Nimbostratus clouds can produce long,steady periods of precipitation.

Accepted Answer

A) True 
 B)False

Question 11

Hygroscopic nuclei:

Accepted Answer

A)  repel water and prevent condensation.
B)  can allow cloud droplets to form even if the relative humidity is less than 100%.
C)  are not generally found in nature.
D)  are not the most ideal type of condensation nuclei for encouraging droplet growth.E) B) and D)
F) A) and B)

Question 12

A(n) ________ is a low layer of dark gray clouds that produces precipitation.

Accepted Answer

A)  cumulonimbus
B)  altostratus
C)  nimbostratus
D)  cirrostratus
E)  cirrusF) C) and E)
G) A) and D)

Question 13

Atmospheric electricity is believed to play an import role in the collision-coalescence process.

Accepted Answer

A) True 
 B)False

Question 14

At -15°C,clouds contain both ice crystals and supercooled water droplets.

Accepted Answer

A) True 
 B)False

Question 15

When a 'trace of precipitation' has been reported,it means that less than 0.25 inches of rain has fallen.

Accepted Answer

A) True 
 B)False

Question 16

The most common way for air to be cooled in order that a cloud may form is by:

Accepted Answer

A)  sinking and contracting.
B)  emitting radiation.
C)  evaporating water.
D)  rising and expanding.
E)  reflecting radiation.F) B) and E)
G) C) and D)

Question 17

Freezing nuclei are part of the collision-coalescence process.

Accepted Answer

A) True 
 B)False

Question 18

High clouds are those that form at altitudes of at least:

Accepted Answer

A)  6500 ft (2000 m) .
B)  20,000 ft (6000 m) .
C)  32,800 ft (10,000 m) .
D)  65,617 ft (20,000 m) .E) All of the above
F) C) and D)

Question 19

The cloud droplets in a cloud are formed by water vapor molecules and:

Accepted Answer

A)  protons.
B)  ions.
C)  molecules of air.
D)  condensation nuclei.
E)  other water vapor molecules.F) B) and C)
G) A) and E)

Question 20

Advection fogs form best when there is no wind.

Accepted Answer

A) True 
 B)False

Exam 5: Forms of Condensation and Precipitation

Clouds which have extensive vertical dimensions are often classified as:

Correct AnswerverifiedShow Answer

The growth of a hailstone usually involves everything EXCEPT:

Correct AnswerverifiedShow Answer

At -15°C,clouds contain both ice crystals and supercooled water droplets.

Correct AnswerverifiedShow Answer

Which of these is a mid-level cloud?

Correct AnswerverifiedShow Answer

Hygroscopic nuclei:

Correct AnswerverifiedShow Answer

Successful dispersal of fog by seeding is limited to supercooled fog.

Correct AnswerverifiedShow Answer

Who first created the cloud classification system on which our modern system is based?

Correct AnswerverifiedShow Answer

The largest hailstone ever recorded in the United States weighed over 5 pounds.

Correct AnswerverifiedShow Answer

When a 'trace of precipitation' has been reported,it means that less than 0.25 inches of rain has fallen.

Correct AnswerverifiedShow Answer

A cloud that forms liquid droplets has a relative humidity of 100 percent with respect to the liquid droplets.If temperature is <0°C and ice crystals form in this cloud,the relative humidity will be ________ with respect to the ice crystals.

Correct AnswerverifiedShow Answer

Nimbostratus clouds can produce long,steady periods of precipitation.

Correct AnswerverifiedShow Answer

The cloud droplets in a cloud are formed by water vapor molecules and:

Correct AnswerverifiedShow Answer

The most common way for air to be cooled in order that a cloud may form is by:

Correct AnswerverifiedShow Answer

High clouds are those that form at altitudes of at least:

Correct AnswerverifiedShow Answer

A radiation fog requires which of the following in order to form?

Correct AnswerverifiedShow Answer

Freezing nuclei are part of the collision-coalescence process.

Correct AnswerverifiedShow Answer

Advection fogs form best when there is no wind.

Correct AnswerverifiedShow Answer

Graupel forms when rime collects on ice crystals in a cloud.

Correct AnswerverifiedShow Answer

A(n) ________ is a low layer of dark gray clouds that produces precipitation.

Correct AnswerverifiedShow Answer

Atmospheric electricity is believed to play an import role in the collision-coalescence process.

Correct AnswerverifiedShow Answer

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