AVIA 340 FINAL STUDY EXAM 2025
QUESTIONS AND ANSWERS
Weather accounts for ________________of the aviation accidents and almost
_____________of all aviation fatalities.
80%, 10%
25%, 40%
40%, 95% - ANS 25%, 40%
Every physical process of weather is accompanied by, or is the result of, a _________
__________.
pressure differential
movement of air
heat exchange - ANS heat exchange
What causes variations in altimeter settings between weather reporting points?
variation of terrain elevation.
unequal heating of the Earth's surface.
Coriolis force. - ANS unequal heating of the Earth's surface.
Up to a certain altitude in the atmosphere (called the tropopause), temperature generally
________ with altitude.
increases
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,remains constant
decreases - ANS decreases
Air is forced to curve ___________ by something known as the Coriolis force.
to the left
upward
to the right - ANS to the right
Air has _______________.
no molecules
weight
no weight - ANS weight
Along the equator, there exists areas of _________ air.
warmer (rising)
warmer (descending)
colder (rising) - ANS warmer (rising)
Rising air certainly __________ create as much pressure on the surface as descending air.
does not
cannot
does - ANS does not
Permanent high pressure areas exist at the ________. Colder (more dense) air descends,
creating _________ pressure on the Earth's surface.
poles, low
equator, high
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,poles, high - ANS poles, high
What are the processes by which moisture is added to unsaturated air?
Supersaturation and evaporation
Heating and condensation
Evaporation and sublimation - ANS Evaporation and sublimation
The air is said to be _________ when additional water vapor is unable to enter the air.
evaporated
humidified
saturated - ANS saturated
The amount of water vapor which air can hold depends on the _______.
dewpoint
air temperature
stability of the air - ANS air temperature
There are two ways to cool air and condense water vapor. You can put the air in contact with a
_____________surface or environment. Second, you can __________ the and let it cool by
expansion.
cooler, lower
cooler, lift - ANS cooler, lift
Fog formation is often based on air coming into contact with a __________ surface.
cooler
wetter
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, warmer - ANS cooler
Air that rises always ______ and ________.
expands, heats up
compresses, heats up
expands, cools - ANS expands, cools
Relative humidity is a number that tells you how much _________the air is holding in relation
to how much it could theoretically hold at its current __________.
water vapor, humidity
water vapor, temperature
pressure, volume - ANS water vapor, temperature
Cooling the air _______its relative humidity.
increases
doesn't affect
decreases - ANS increases
Heating the air _________ its relative humidity.
doesn't affect
increases
decreases - ANS decreases
While relative humidity informs us about the air's capacity to hold _________ , it doesn't allow
us to predict when ________________will form.
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QUESTIONS AND ANSWERS
Weather accounts for ________________of the aviation accidents and almost
_____________of all aviation fatalities.
80%, 10%
25%, 40%
40%, 95% - ANS 25%, 40%
Every physical process of weather is accompanied by, or is the result of, a _________
__________.
pressure differential
movement of air
heat exchange - ANS heat exchange
What causes variations in altimeter settings between weather reporting points?
variation of terrain elevation.
unequal heating of the Earth's surface.
Coriolis force. - ANS unequal heating of the Earth's surface.
Up to a certain altitude in the atmosphere (called the tropopause), temperature generally
________ with altitude.
increases
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,remains constant
decreases - ANS decreases
Air is forced to curve ___________ by something known as the Coriolis force.
to the left
upward
to the right - ANS to the right
Air has _______________.
no molecules
weight
no weight - ANS weight
Along the equator, there exists areas of _________ air.
warmer (rising)
warmer (descending)
colder (rising) - ANS warmer (rising)
Rising air certainly __________ create as much pressure on the surface as descending air.
does not
cannot
does - ANS does not
Permanent high pressure areas exist at the ________. Colder (more dense) air descends,
creating _________ pressure on the Earth's surface.
poles, low
equator, high
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,poles, high - ANS poles, high
What are the processes by which moisture is added to unsaturated air?
Supersaturation and evaporation
Heating and condensation
Evaporation and sublimation - ANS Evaporation and sublimation
The air is said to be _________ when additional water vapor is unable to enter the air.
evaporated
humidified
saturated - ANS saturated
The amount of water vapor which air can hold depends on the _______.
dewpoint
air temperature
stability of the air - ANS air temperature
There are two ways to cool air and condense water vapor. You can put the air in contact with a
_____________surface or environment. Second, you can __________ the and let it cool by
expansion.
cooler, lower
cooler, lift - ANS cooler, lift
Fog formation is often based on air coming into contact with a __________ surface.
cooler
wetter
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, warmer - ANS cooler
Air that rises always ______ and ________.
expands, heats up
compresses, heats up
expands, cools - ANS expands, cools
Relative humidity is a number that tells you how much _________the air is holding in relation
to how much it could theoretically hold at its current __________.
water vapor, humidity
water vapor, temperature
pressure, volume - ANS water vapor, temperature
Cooling the air _______its relative humidity.
increases
doesn't affect
decreases - ANS increases
Heating the air _________ its relative humidity.
doesn't affect
increases
decreases - ANS decreases
While relative humidity informs us about the air's capacity to hold _________ , it doesn't allow
us to predict when ________________will form.
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