ATSC 231 Block 3 Exam Questions and Answers (Already Graded A+)
What type of weather conditions are favorable for the formation of nocturnal radiation temp inversions - Answer- weak surface wind
The wind shear associated with fronts at upper levels is a result of a change in wind direction - An...
What type of weather conditions are favorable for the formation of nocturnal radiation
temp inversions - Answer- weak surface wind
The wind shear associated with fronts at upper levels is a result of a change in wind
direction - Answer- false
What action should a pilot take if shear turbulence due to nocturnal radiation temp
inversion is suspected - Answer- slow to maneuvering speed and alert
What are 2 types of temp inversions that are associated with shear turbulence? -
Answer- nocturnal radiation and terrain induced
Moderate turbulence should be expected when the vertical shear gradient exceeds ___
knots per 1000 ft - Answer- 5
How can fronts be identified on atmospheric soundings of the atmosphere - Answer-
temp inversions
What should a pilot do to minimize the exposure to shear turbulence caused by frontal
zones when paralleling the front? - Answer- climb or descend
Which is a characteristics of jet streams as described in the AC? - Answer- jet streams
follow the boundaries between hot and cold air
Jet streams are the strongest for both the northern and southern hemispheres in which
season? - Answer- winter
Clear air turbulence includes turbulence caused by thunderstorms, low-altitude temp
inversions, thermals, strong surface winds or local terrain features - Answer- false
Clear air turbulence is especially troublesome because it is often encountered
unexpectedly and frequently without visual clues to warn pilots of the hazard - Answer-
true
Moderate CAT is considered likely when the vertical wind shear is _____ knots per
1000 ft or greater - Answer- 5 knots
, Jet streams shift on a seasonal basis, moving into Canada by summer - Answer- true
The sub-tropical jet stream is located at lower altitudes than the polar jet stream -
Answer- false
CAT associated with a jet stream is most commonly found in the vicinity of - Answer-
tropopause and upper fronts
Clear air turbulence includes turbulence in cirrus cloud and in the vicinity of standing
lenticular clouds - Answer- true
Moderate CAT is considered likely when the horizontal wind shear is _____ knots per
150 nautical miles of greater - Answer- 40 knots
The distance which turbulence extends downwind of an object increases as the height
of the object - Answer- increases
An a/c should expect _____ on the upwind leg when departing from an airport situated
on terrain higher than the surroundings and the wind speed is greater than 20 knots -
Answer- an updraft
Rough terrain features on the surface tend to _____ the shear in the lowest layers of the
atmophsere - Answer- increase
The depth of the boundary layer increases with rough terrain for a given wind speed -
Answer- true
The airflow above an obstacle can be disturbed up to ___ times the height of the
obstacle - Answer- 2
Turbulence caused by small objects on the ground will be found downwind of the object
as the wind speed - Answer- increases
Severe turbulence over rough terrain should be expected when the wind speed exceeds
- Answer- 40 knots
An a/c should expect _____ on final approach when landing at an airport situated on
terrain higher than the surroundings and the wind speed is greater than 20 knots -
Answer- a downdraft
What type of wind flow would a pilot expect if they flew their a/c down the center of a
valley at night assuming the flow were caused by thermal circulations? - Answer-
predominantly updraft
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