题目内容

The main methods of laminar flow control include: ____.

A. Changing the wing’s configuration
Breath air at the wing’s leading edge
C. Breath air at the wing’s lower surface
D. Breath air at the wing’s upper surface

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Main methods of suppress the airflow separation are: ____.

A. Using vortex generator.
B. Using air blowing control at separation position
C. Launch a high-speed jet at the leading edge of the wing.
D. Control the angle of attack of the wing.

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The influences of wingtip trailing vortex are: ____.

A. The efficiency of the airport
B. The efficiency of aircraft’s take-off and landing
C. The lift of the plane
D. Increase the induced drag

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The main noise sources on the airframe includes: ____.

Aerodynamic noises of high lift device
B. Aerodynamic noises of landing gear
C. Interference noises among the aircraft
D. Jet noise of engine

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For an aircraft to fly continuously and steadily in the sky, the most basic conditions should be met are: ____.

A. Sufficient lift
B. Sufficient power
C. Good piloting technique
D. Good stability and maneuverability

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The main methods of laminar flow control include: ____.

A. Changing the wing’s configuration Breath air at the wing’s leading edge C. Breath air at the wing’s lower surface D. Breath air at the wing’s upper surface

Main methods of suppress the airflow separation are: ____.

The influences of wingtip trailing vortex are: ____.

The main noise sources on the airframe includes: ____.

For an aircraft to fly continuously and steadily in the sky, the most basic conditions should be met are: ____.

A. Changing the wing’s configuration
Breath air at the wing’s leading edge
C. Breath air at the wing’s lower surface
D. Breath air at the wing’s upper surface