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A X
Within what mach range dose transonic fight regimes usually
occur?
A.-.50 to .75 mach
B.-.75 to .1.20 mach
C.-1.20 to 2.50 mach
B X
Airflow separation over the wing can be delayed by using
vortex generators.
A.Directing high pressure air over the top of the wing or flap
through slots and making the wing surface smooth.
B.Directing a suction over the top of the wing or flap through
slots and making the wing surface smooth.
C. Making the wing surface rough and/or directing high
pressure air over the top of the wing or flap through slots.
C X
At what Mach range does de subsonic flight range normally
occur?
A.Below.75 Mach.
B.From.75 to 1.20 Mach.
C.From.1.20 to 2.5. Mach.
A X
At which speed will increasing the pitch attitude cause an
airplane to climb?
A.Low speed.
B.High speed.
C.Any speed.
B X
By changing the angle of attack of a wing, the pilot can
control the airplane's
A.lift, gross weight, and drag.
B.lift, airspeed, and drag.
C.lift and airspeed, but not drag.
B X
Describe dynamic longitudinal stability
A.Motion about the longitudinal.
B.Motion about the lateral axis.
C.Motion about the vertical axis.
B X
For a given angle of bank, the load factor imposed on both
the aircraft and pilot in a coordinated constant-altitude
turn
A.is directly related to the airplane's gross weight.
B.varies with the rate of turn.
C.is constant
C X
For which purpose may flight spoilers be used?
A.Reduce the wings' lift upon landing.
B.Increase the rate of descent without increasing aerodynamic
drag.
C.Aid in longitudinal balance when rolling an airplane into
a turn.
A X
How can an airplane produce the same lift in ground effect
as when out of ground effect?
A.The same angle of attack.
B.A lower angle of attack.
C.A higher angle of attack.
B X
How can the pilot increase the rate of turn and decrease the
radius at the same time?
A.- Steepen the bank and increase airspeed.
B. Steepen the bank and decrease airspeed.
C.Shallow the bank and increase airspeed.
B X
How does the wake turbulence vortex circulate around each
wingtip?
A. Inward, upward, and around the wingtip.
B. Counterclockwise when viewed from behind the aircraft.
C. Outward, upward, and around the wingtip.
C X
Identify the type stability if the aircraft attitude remains
in new position after the controls have been neutralized.
A.Negative longitudinal static stability
B. Neutral longitudinal dynamic stability
C.-Neutral longitudinal static stability
C X
Identify the type stability if the aircraft attitude tends
to move farther from its original position after the controls
have been neutralized
A.-Negative static stability
B.-Positive static stability
C.-Negative dynamic stability
A X
Identify the type stability if the aircraft attitude tends
to return to its original after the controls have been
neutralized.
A.Positive dynamic stability.
B.Positive static stability.
C.Neutral dynamic stability.
B X
If an aircraft level turns at an angle of bank of 30 degree ,
the load factor is
A.1Gs.
B.2Gs.
C.1.4Gs
C X
If an aircraft with a gross weight of 2000 pounds were
subjected to a total load of 6000 pounds in flight the load
factor would be
A.2Gs.
B.3Gs.
C.9Gs
B X
If no corrective action is taken by the pilot as angle of bank
is increased, how is the vertical component of lift and sink
rate affected?
A.Lift increases and the sink rate increases
B.Lift decreases and the sink rate decreases
C.Lift decreases and the sink rate increases
C X
If severe turbulence is encountered, which procedure is
recommended?
A.Maintain a constant altitude.
B.Maintain a constant attitude.
C.Maintain constant airspeed and altitude.
B X
If the airplane attitude remains in a new position after the
elevator control is pressed forward and released, the
airplane displays
A.-neutral longitudinal static stability.
B.-positive longitudinal static stability.
C.-neutral longitudinal dynamic stability.
A X
If you take off behind a heavy jet that has just landed, you
should plan to lift off
A. Prior to the point where the jet touched down.
B. Beyond the point where the jet touched down.
C. At the point where the jet touched down and on the upwind
edge of the runway.
B X
4.性能
1..Maximum range performance of a turbojet aircraft is
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