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Principle of Flight - PPL(A) English - Private Pilot License (Aircraft)

Test 10 domande Principle of Flight, tempo libero

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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