For Question 11 select "B", "C" or "D" ("A" is selected only as an example)!
11. How will frost on the wings of an airplane affect takeoff performance?
A) Select a correct answer below. B) Frost will change the camber of the wing, increasing its lifting capability. C) Frost will cause the airplane to become airborne with a higher angle of attack, decreasing the stall speed. D) Frost will disrupt the smooth flow of air over the wing, adversely affecting its lifting capability.
12. What force makes an airplane turn?
A) The horizontal component of lift. B) The vertical component of lift. C) Centrifugal force. D) All of the above.
13. VFR approaches to land at night should be accomplished:
A) at a higher airspeed. B) with a steeper descent. C) the same as during daytime. D) None of the above.
14. The term "angle of attack" is defined as the angle:
A) between the wing chord line and the relative wind. B) between the airplane's climb angle and the horizon. C) formed by the longitudinal axis of the airplane adn the chord line of the wing. D) all of the above.
15. In what flight condition is torque effect the greatest in a single-engine airplane?
A) Low airspeed, high power, high angle of attack. B) Low airspeed, low power, low angle of attack. C) High airspeed, high power, high angle of attack. D) None of the above.
16. When does P-factor cause the airplane to yaw to the left?
A) When at low angles of attack. B) When at high angles of attack. C) When at high airspeeds. D) All of the above.
17. What causes an airplane (except a T-Tail) to pitch nosedown when power is reduced and controls are not adjusted?
A) The CG shifts forward when thrust and drag are reduced. B) The downwash on the elevators from the propeller slipstream is reduced and elevator effectiveness is reduced. C) When thrust is reduced to less than weight, lift is also reduced and the wings can no longer support the weight. D) None of the above.
18. What determines the longitudinal stability of an airplane?
A) The location of the CG with respect to the center of lift. B) The effectiveness of the horizontal stabilizer, rudder, and rudder trim tab. C) The relationship of thrust and lift to weight and drag. D) All of the above.
19. What is the purpose of the rudder on an airplane?
A) To control yaw. B) To control overbanking tendency. C) To control roll. D) None of the above.
20. An airplane said to be inherently stable will:
A) be difficult to stall. B) require less effort to control. C) not spin. D) All of the above.