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WX 201 Exam Questions With Complete
Answers And Graded A+
Generally, the concentration of condensation nuclei is greater
over the oceans than over land.
False
If a city receives 24 inches of snow, it is the equivalent to 18
inches of rain.
False
An important factor in the production of rain by the collision-
coalescence process is the number of ice crystals in the cloud.
False
In a cloud composed of water droplets and ice crystals, the
saturation vapor pressure is less over the droplets than over the
ice.
False
There are many types of precipitation. Let's think about the
typical, however. A typical raindrop is about ____ than a typical
cloud droplet.
one hundred times larger
In the winter, you read in the newspaper that a large section of the
Midwest is without power due to downed power lines. Which form
of precipitation would most likely produce this situation?
Freezing rain
Precipitation with the greatest size (diameter) is ____.
a hailstone
Which statement below best describes the curvature effect?
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Reduced surface tension and the larger saturation vapor pressure
required for the drop to remain in equilibrium with its surroundings.
Condensation onto hygroscopic nuclei is possible at relative
humidity less than 100 percent due to the ____.
solute effect
Found in certain regions of the cloud formation, a supercooled
cloud droplet is ____.
a liquid droplet observed at temperatures below 0 degrees Celsius (32
degrees Fahrenheit)
Typical cloud droplets seldom reach the ground as rain because
they evaporate before reaching the ground.
True
Which below best describes the solute effect?
The water droplets dissolve hygroscopic nuclei and condensation can
occur at relative humidity less than 100 percent.
Heavy showers usually fall from cumulus clouds, whereas steady
precipitation normally falls from stratus clouds.
True
Large, heavy snowflakes are associated with moist air and
temperatures well below freezing.
False
Clouds are complex and can have different temperature zones.
The region of a cloud where only ice particles exist is called ____.
glaciated
Generally, the smaller the pure water droplet, the lower the
temperature at which it will freeze.
True
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The growth of a precipitation particle by the collision of an ice
crystal (or snowflake) with a supercooled liquid droplet is called
____.
accretion
While the diameter of raindrops can vary widely, most that reach
Earth's surface are seldom larger than ____ in diameter.
5 mm
The main difference between a cloud drop and a raindrop is its
____.
size
In a fact that surprises many people, small raindrops fall ____
large raindrops, and have ____ terminal velocity than/as large
raindrops.
slower than; a lesser
Atmospheric conditions that produce sleet differ from those that
produce hail because for sleet to form, surface temperatures
must be below freezing, whereas surface temperatures are
typically well above freezing during hailstorms.
True
The speed of falling cloud droplet increases until the air
resistance ____
equals the pull of gravity
Which of the following might be mistaken for hail because of its
appearance and its origin?
Graupel
There are many types of clouds, but not all produce precipitation.
Which cloud type will only produce precipitation by the collision-
coalescence process?
A thick, warm cumulus cloud.
WX 201 Exam Questions With Complete
Answers And Graded A+
Generally, the concentration of condensation nuclei is greater
over the oceans than over land.
False
If a city receives 24 inches of snow, it is the equivalent to 18
inches of rain.
False
An important factor in the production of rain by the collision-
coalescence process is the number of ice crystals in the cloud.
False
In a cloud composed of water droplets and ice crystals, the
saturation vapor pressure is less over the droplets than over the
ice.
False
There are many types of precipitation. Let's think about the
typical, however. A typical raindrop is about ____ than a typical
cloud droplet.
one hundred times larger
In the winter, you read in the newspaper that a large section of the
Midwest is without power due to downed power lines. Which form
of precipitation would most likely produce this situation?
Freezing rain
Precipitation with the greatest size (diameter) is ____.
a hailstone
Which statement below best describes the curvature effect?
,2|Page
Reduced surface tension and the larger saturation vapor pressure
required for the drop to remain in equilibrium with its surroundings.
Condensation onto hygroscopic nuclei is possible at relative
humidity less than 100 percent due to the ____.
solute effect
Found in certain regions of the cloud formation, a supercooled
cloud droplet is ____.
a liquid droplet observed at temperatures below 0 degrees Celsius (32
degrees Fahrenheit)
Typical cloud droplets seldom reach the ground as rain because
they evaporate before reaching the ground.
True
Which below best describes the solute effect?
The water droplets dissolve hygroscopic nuclei and condensation can
occur at relative humidity less than 100 percent.
Heavy showers usually fall from cumulus clouds, whereas steady
precipitation normally falls from stratus clouds.
True
Large, heavy snowflakes are associated with moist air and
temperatures well below freezing.
False
Clouds are complex and can have different temperature zones.
The region of a cloud where only ice particles exist is called ____.
glaciated
Generally, the smaller the pure water droplet, the lower the
temperature at which it will freeze.
True
, 3|Page
The growth of a precipitation particle by the collision of an ice
crystal (or snowflake) with a supercooled liquid droplet is called
____.
accretion
While the diameter of raindrops can vary widely, most that reach
Earth's surface are seldom larger than ____ in diameter.
5 mm
The main difference between a cloud drop and a raindrop is its
____.
size
In a fact that surprises many people, small raindrops fall ____
large raindrops, and have ____ terminal velocity than/as large
raindrops.
slower than; a lesser
Atmospheric conditions that produce sleet differ from those that
produce hail because for sleet to form, surface temperatures
must be below freezing, whereas surface temperatures are
typically well above freezing during hailstorms.
True
The speed of falling cloud droplet increases until the air
resistance ____
equals the pull of gravity
Which of the following might be mistaken for hail because of its
appearance and its origin?
Graupel
There are many types of clouds, but not all produce precipitation.
Which cloud type will only produce precipitation by the collision-
coalescence process?
A thick, warm cumulus cloud.
