AVIA340 QUIZ1 copy
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School
Liberty University *
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Course
340
Subject
Geography
Date
Dec 6, 2023
Type
docx
Pages
8
Uploaded by JusticeRiverHamster15
Question 1
2 / 2 pts
Stable air suppresses vertical motion while unstable air enhances it.
True
False
Question 2
2 / 2 pts
Frontal systems point in the opposite direction of frontal movement.
True
False
Question 3
2 / 2 pts
Nimbus comes from the Latin word meaning _______.
rain
unstable
layer
lightning
Question 4
2 / 2 pts
What is the standard atmosphere value at sea level commonly used for U.S. Aviation?
1013.2 hPa
29.92 inHg
1013.2 mb
14.7 psi
Incorrect
Question 5
0 / 2 pts
Local winds include:
sea breeze
land effect
jetstream
both a and b
Question 6
2 / 2 pts
A _____ is an elongated area of relatively low atmospheric pressure.
low pressure
trough
ridge
high pressure
Question 7
2 / 2 pts
Wind cannot change the stability of a column of air in the atmosphere. (
True
False
Incorrect
Question 8
0 / 2 pts
____________ occur when there is a shallow layer aloft with above freezing temperatures and with a deep layer of below freezing air based at the surface.
snow
ice pellets
rain
freezing rain
Incorrect
Question 9
0 / 2 pts
The "pause" in concentric layers is where the maximum changes in thermal characteristics, chemical composition, movement, and density occur.
True
False
Incorrect
Question 10
0 / 2 pts
Diurnal temperature variation is the property of the ambient air that either enhances or suppresses vertical motion of air parcels and determines which type of clouds and precipitation a pilot will encounter.
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True
False
Question 11
2 / 2 pts
In what part of the atmosphere are meteors found?
Troposphere
Thermosphere
Mesosphere
Stratosphere
Question 12
2 / 2 pts
Why do commercial airplanes usually fly in the lower stratosphere?
To avoid general aviation traffic
To avoid atmospheric turbulence in the troposphere
To avoid convection in the troposphere
Both b and c
Question 13
2 / 2 pts
Which of the following are considered high-level clouds?
cirrus
cirrostratus
altocumulus
both a and b
Question 14
2 / 2 pts
A gust is a fluctuation of wind speed with variations of 20 knots or more between peaks and lulls.
True
False
AVIA 340 Quiz 2
Question 15
2 / 2 pts
The disadvantages of flying in the stratosphere can include:
increased fuel consumption due to warmer temperatures
increased levels of radiation
increased concentration of ozone
All of the above
Question 16
2 / 2 pts
A high pressure system is anticyclonic.
True
False
Question 17
2 / 2 pts
When does a surface-based inversion typically occur?
on a clear night with high winds
during a hot summer day
on a clear night when winds are light
on a cloudy night when winds are light
Question 18
2 / 2 pts
Which form of vertical motion occurs when the cold, denser air wedges under
the warm, less dense air, plowing it upward, and/or the warmer air rides up and over the colder air.
Frontal lift
Frictional effects
buoyancy
Orographic effects
Question 19
2 / 2 pts
Pressure is the ratio of any quantity to the volume or area it occupies.
True
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False
Question 20
2 / 2 pts
The jetstream are the weakest in the winters for both the Northern and Southern Hemisphere.
True
False
Question 21
2 / 2 pts
Weather is the atmosphere's response to unequal rates of radiational heating
and cooling across the surface of the Earth and within its atmosphere.
True
False
Question 22
2 / 2 pts
Water is more resistant to temperature changes than land.
True
False
Question 23
2 / 2 pts
Which circulation is a low-latitude air movement toward the Equator that, with heating, rises vertically with poleward movement in the upper atmosphere? This circulation forms a convection cell that dominates tropical and subtropical climates.
Hadley cell
Ferrel cell
Polar cell
Question 24
2 / 2 pts
High density altitude shortens a pilot's takeoff and landing rolls.
True
False
Question 25
2 / 2 pts
High density altitude is a hazard since it reduces aircraft performance in which ways?
It reduces power because the engine takes in less air to support combustion.
It reduces thrust because there is less air for the propeller to work with, or a jet has less mass of gases to force out of the exhaust.
It reduces lift because the light air exerts less force on the airfoils.
All of the above