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Principle of Flight - PPL(A) English - Private Pilot License (Aircraft)
Test 10 domande Principle of Flight, tempo libero
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Nuovo Test!
1 - What kind of drag is NOT part of the parasite drag?
Interference drag
Skin-friction drag
Induced drag
Form drag
2 - What pressure pattern can be observed at a lift-generating wing profile at positive angle of attack?
Low pressure is created above, higher pressure below the profile
High pressure is created above, lower pressure below the profile
Pressure above remains unchanged, higher pressure is created below the profile
Pressure below remains unchanged, lower pressure is created above the profile
3 - Which statement about the airflow around an aerofoil is correct if the angle of attack decreases?
The center of pressure moves aft
The stagnation point remains constant
The stagnation point moves down
The center of pressure moves forward
4 - What has to be considered with regard to the center of gravity position?
The center of gravity's position can only be determined during flight.
Only correct loading can assure a correct and safe center of gravity position
By moving the elevator trim tab, the center of gravity can be shifted into a correct position
By moving the aileron trim tab, the center of gravity can be shifted into a correct position.
5 - How do lift and drag change when approaching a stall condition?
Lift and drag decrease
Lift and drag increase
Lift decreases and drag increases
Lift increases and drag decreases
6 - In motorplanes the stall warning is usually activated by a change of...
The center of gravity
The transition point.
The center of pressure
The center of pressure
7 - Rotation around the vertical axis is called...
Rolling
Pitching
Yawing
Slipping
8 - The critical angle of attack...
Changes with increasing weight.
Decreases with forward center of gravity position
Is independent of the weight.
Increases with backward center of gravity position.
9 - Point number 5 in the figure indicates which flight state? See figure (PFA-008) (1,00 P.) Siehe Anlage 5
Best gliding angle
Slow flight
Stall
Inverted flight
10 - The pressure compensation between wind upper and lower surface results in ...
Laminar airflow by wing tip vortices.
Profile drag by wing tip vortices.
Induced drag by wing tip vortices.
Lift by wing tip vortices
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