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Ground?
A.VMC.
B.VMCG.
C.VMCA.
B X
38..What is the definition of the critical altitude of a
supercharged-reciprocating engine?
A.Highest altitude where the mixture can be leaned to best
power ratio.
B.The highest altitude at which a desired manifold pressure
can be obtained.
C.The altitude at which maximum allowable BMEP can be
obtained.
B X
39..what is the free stream mach number which produce first
of local sonic flow?
A.supersonic mach number
B.transonic mach number
C.critical mach number
C X
40..What is the highest speed possible without supersonic
flow over the wing?
A.Initial buffet speed.
B.Critical Mach number.
C.Transonic index.
B X
41..What is the name of a plane beyond the end of a runway
which does not contain obstructions and can be considered when
calculating takeoff performance of turbine-powered aircraft?
A.Clearway.
B.Stop way.
C.Obstruction clearance plane.
A X
42..What is the resulting performance loss when one engine
on a twin-engine airplane fails?
A.Reduction of cruise airspeed by 50 percent.
B.Reduction of climb by 50 percent or more.
C.Reduction of all performance by 50 percent.
B X
43..What performance is characteristic of flight at maximum
L/D in a propeller-driven airplane?
A.Maximum range and distance glide.
B.Best angle of climb.
C.Maximum endurance.
A X
44..What performance should a pilot of a light, twin-engine
airplane be able to maintain at Vmc ?
A.Heading.
B.Heading and altitude.
C.Heading, altitude, and ability to climb 50 ft/min.
A X
45..What should a pilot do to maintain "best range" airplane
performance when a headwind is encountered?
A.Increase speed.
B.Maintain speed.
C.Decrease speed.
A X
46..Where is the critical altitude of a
supercharged-reciprocating engine?
A.The highest altitude at which a desired manifold pressure
can be obtained.
B.Highest altitude where the mixture can be leaned to best
power ratio.
C.The altitude at which maximum allowable BMEP can be
obtained.
A X
47..Which parameter is used to measure the power output of
a reciprocating engine?
A.RPM.
B.Exhaust gas temperature.
C.Manifold pressure.
C X
48..Which performance factor decreases as airplane gross
weight increases, for a given runway?
A.Critical engine failure speed.
B.Rotation speed.
C.Accelerate-stop distance.
A X
49..Which place in the turbojet engine is subjected to the
highest temperature?
A.Compressor discharge.
B.Fuel spray nozzles.
C.Turbine inlet.
C X
50..Which condition reduces the required runway for takeoff?
A.Higher-than-recommended airspeed before rotation.
B.Lower-than-standard air density.
C.Increased headwind component.
C X
51..Which condition has the effect of reducing critical
engine failure speed?
A.Slush on the runway or inoperative antiskid.
B.Low gross weight.
C.High density altitude.
A X
52..Where will the highest temperature in a turbojet engine
occur?
A.Turbine inlet.
B.Compressor discharge.
C.Fuel spray nozzles.
A X
53..Which airplane performance characteristics should be
recognized during takeoff when encountering a tailwind shear
that increases in intensity?
A. loss of, or diminished, airspeed performance
B. decreased takeoff distance
C. increased climb performance immediately after takeoff
A X
54..Which is a definition of V2 speed?
A.Takeoff decision speed.
B.Takeoff safety speed.
C.Minimum takeoff speed.
B X
55..Which is the correct symbol for the minimum steady-flight
speed or stalling speed in a specific configuration?
A.VS.
B.VS1.
C.VSO.
B X
56..Which is the correct symbol for the stalling speed or the
minimum steady flight speed at which the airplane is
controllable?
A.VSO.
B.VS.
C.VS1.
B X
57..Which maximum range factor increases as weight decreases?
A.Angle of attack.
B.Altitude.
C.Airspeed.
B X
58..Which speed symbol indicates the maximum speed for
operating the landing gear of an airplane?
A.VLE.
B.VMO/MMO.
C.VLO/MLO.
C X
59..Which type of compressor stall has the greatest potential
（潛能） for severe engine damage?
A.Intermittent "backfire" stall.
B.Transient "backfire" stall.
C.Steady, continuous flow reversal stall.
C X
60．。Which term describes the hydroplaning, which occurs when
　
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