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AS 121 EXAM 4 STUDY 2026 100% PASS
ASSURED EXAMINATION SOLUTIONS
The vast majority of clouds, weather, storms
and temperature variances occur within -
correct answer- The troposphere
The average temperature decrease within the
troposphere is - correct answer- 2 degrees
Celsius every 1000 feet of altitude
A major factor that causes the atmosphere to
constantly move is - correct answer- Uneven
heating of the Earth's surface
Which way does Coriolis force deflect moving
air in the Northern hemisphere? - correct
answer- To the right
Why does the wind direction at the surface
vary from the wind direction at 2000 feet? -
correct answer- Friction
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What is standard sea level pressure and
temperature in the International Standard
Atmosphere (ISA)? - correct answer- 29.92 "Hg
and 59 degrees F
Falling pressure generally indicates what kind
of weather? - correct answer- Approaching bad
weather
What happens to barometric pressure as
altitude increases? - correct answer- Pressure
decreases
What effect does altitude have on takeoff
distance in an airplane? - correct answer- The
higher the altitude the longer the takeoff run
Which way does air flow? - correct answer-
From high pressure to low pressure
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Which way does air circulate around a high
pressure area (Northern Hemisphere) - correct
answer- Clockwise
Which of the following is true? - correct
answer- Land heats up faster than water due to
solar energy
A pilot can expect the following when
encountering wind shear that produces a change
in wind direction from a headwind to a
tailwind. - correct answer- A decrease in
airspeed and performance
The most severe type of low-level wind shear
(microburst) is associated with what kind of
weather? - correct answer- Convective
precipitation
Which of the following produces a "sea
breeze"? - correct answer- Warm air over land
rises, cool air over water descends causing
air to move from over the water toward the
shore
AS 121 EXAM 4 STUDY 2026 100% PASS
ASSURED EXAMINATION SOLUTIONS
The vast majority of clouds, weather, storms
and temperature variances occur within -
correct answer- The troposphere
The average temperature decrease within the
troposphere is - correct answer- 2 degrees
Celsius every 1000 feet of altitude
A major factor that causes the atmosphere to
constantly move is - correct answer- Uneven
heating of the Earth's surface
Which way does Coriolis force deflect moving
air in the Northern hemisphere? - correct
answer- To the right
Why does the wind direction at the surface
vary from the wind direction at 2000 feet? -
correct answer- Friction
,2 | Page
What is standard sea level pressure and
temperature in the International Standard
Atmosphere (ISA)? - correct answer- 29.92 "Hg
and 59 degrees F
Falling pressure generally indicates what kind
of weather? - correct answer- Approaching bad
weather
What happens to barometric pressure as
altitude increases? - correct answer- Pressure
decreases
What effect does altitude have on takeoff
distance in an airplane? - correct answer- The
higher the altitude the longer the takeoff run
Which way does air flow? - correct answer-
From high pressure to low pressure
, 3 | Page
Which way does air circulate around a high
pressure area (Northern Hemisphere) - correct
answer- Clockwise
Which of the following is true? - correct
answer- Land heats up faster than water due to
solar energy
A pilot can expect the following when
encountering wind shear that produces a change
in wind direction from a headwind to a
tailwind. - correct answer- A decrease in
airspeed and performance
The most severe type of low-level wind shear
(microburst) is associated with what kind of
weather? - correct answer- Convective
precipitation
Which of the following produces a "sea
breeze"? - correct answer- Warm air over land
rises, cool air over water descends causing
air to move from over the water toward the
shore
