1. What is the primary cause of downwash behind a finite wing?
(A) Boundary layer separation
(B) Wingtip vortices
(C) Shock waves
(D) Skin friction
2. Induced drag is a byproduct of:
(A) Parasite drag
(B) Form drag
(C) Lift generation
(D) Skin friction
3. Downwash causes the airflow behind the wing to be:
(A) Accelerated upward
(B) Rotated laterally
(C) Deflected downward
(D) Unaffected
4. Induced drag increases when:
(A) Wing aspect ratio increases
(B) Lift coefficient decreases
(C) Speed increases
(D) Angle of attack increases
5. The induced drag is highest during:
(A) High-speed level flight
(B) Takeoff and landing
(C) Low angle of attack
(D) Supersonic flight
6. Which wing design reduces induced drag most effectively?
(A) Rectangular wing
(B) Low aspect ratio wing
(C) Swept wing
(D) High aspect ratio wing
7. The formation of wingtip vortices leads to:
(A) Reduced thrust
(B) Increased fuel efficiency
(C) Downwash and induced drag
(D) Supersonic shock waves
8. Which of the following reduces downwash effects?
(A) Winglets
(B) Flaps
(C) Spoilers
(D) Slats