ATPL (Philippines) - Aircraft General Knowledge 2

1. Which of the following is considered a primary flight control?

A. Slats.

B. Elevator.

C. Dorsal fin.

B. Elevator.

2. Which of the following are considered primary flight controls?

A. Tabs.

B. Flaps.

C. Outboard ailerons.

C. Outboard ailerons.

3. Which of the following is considered an auxiliary flight control?

A. Ruddervator.

B. Upper rudder.

C. Leading-edge flaps.

C. Leading-edge flaps.

4. When are inboard ailerons normally used?

A. Low-speed flight only.

B. High-speed flight only.

C. Low-speed and high-speed flight.

C. Low-speed and high-speed flight.

5. When are outboard ailerons normally used?

A. Low-speed flight only.

B. High-speed flight only.

C. Low-speed and high-speed flight.

A. Low-speed flight only.

6. Why do some airplanes equipped with inboard/outboard ailerons use the outboards for slow flight only?

A. Increased surface area provides greater controllability with flap extension.

B. Aerodynamic loads on the outboard ailerons tend to twist the wingtips at high speeds.

C. Locking out the outboard ailerons in high-speed flight provides variable flight control feel.

B. Aerodynamic loads on the outboard ailerons tend to twist the wingtips at high speeds.

7. What is the purpose of a control tab?

A. Move the flight controls in the event of manual reversion.

B. Reduce control forces by deflecting in the proper direction to move a primary flight control.

C. Prevent a control surface from moving to a full-deflection position due to aerodynamic forces.

A. Move the flight controls in the event of manual reversion.

8. What is the purpose of an elevator trim tab?

A. Provide horizontal balance as airspeed is increased to allow hands-off flight.

B. Adjust the speed tail load for different airspeeds in flight allowing neutral control forces.

C. Modify the downward tail load for various airspeeds in flight eliminating flight-control pressures.

C. Modify the downward tail load for various airspeeds in flight eliminating flight-control pressures.

9. Which direction from the primary control surface does an elevator adjustable trim tab move when the control surface is moved?

A. Same direction.

B. Opposite direction.

C. Remains fixed for all positions.

C. Remains fixed for all positions.

10. What is the purpose of a servo tab?

A. Move the flight controls in the event of manual reversion.

B. Reduce control forces by deflecting in the proper direction to move a primary flight control.

C. Prevent a control surface from moving to a full-deflection position due to aerodynamic forces.

B. Reduce control forces by deflecting in the proper direction to move a primary flight control.

11. Which direction from the primary control surface does a servo tab move?

A. Same direction.

B. Opposite direction.

C. Remains fixed for all positions.

B. Opposite direction.

12. What is the purpose of an anti-servo tab?

A. Move the flight controls in the event of manual reversion.

B. Reduce control forces by deflecting in the proper direction to move a primary flight control.

C. Prevent a control surface from moving to a full-deflection position due to aerodynamic forces.

C. Prevent a control surface from moving to a full-deflection position due to aerodynamic forces.

13. Which direction from the primary control surface does an anti-servo tab move?

A. Same direction.

B. Opposite direction.

C. Remains fixed for all positions.

A. Same direction.

14. The primary purpose of high-lift devices is to increase the

A. L/DMAX.

B. lift at low speeds.

C. drag and reduce airspeed.

B. lift at low speeds.

15. Which is a purpose of leading-edge flaps?

A. Increase the camber of the wing.

B. Reduce lift without increasing airspeed.

C. Direct airflow over the top of the wing at high angles of attack.

A. Increase the camber of the wing.

16. What is the primary function of the leading edge flaps in landing configuration during the flare before touchdown?

A. Prevent flow separation.

B. Decrease rate of sink.

C. Increase profile drag.

A. Prevent flow separation.

17. What effect does the leading edge slot in the wing have on performance?

A. Decreases profile drag.

B. Changes the stalling angle of attack to a higher angle.

C. Decelerates the upper surface boundary layer air.

B. Changes the stalling angle of attack to a higher angle.

18. Which is a purpose of leading-edge slats on high-performance wings?

A. Increase lift at relative slow speeds.

B. Improve aileron control during low angles of attack.

C. Direct air from the low-pressure area under the leading edge along the top of the wing.

A. Increase lift at relative slow speeds.

19. Which is a purpose of leading-edge slats on high-performance wings?

A. Decrease lift at relative slow speeds.

B. Improve aileron control during low angles of attack.

C. Direct air from the high-pressure area under the leading edge along the top of the wing.

C. Direct air from the high-pressure area under the leading edge along the top of the wing.

20. What is a purpose of flight spoilers?

A. Increase the camber of the wing.

B. Reduce lift without increasing airspeed.

C. Direct airflow over the top of the wing at high angles of attack.

B. Reduce lift without increasing airspeed.

21. For which purpose may flight spoilers be used?

A. Reduce the wings' lift upon landing.

B. Increase the rate of descent without increasing aerodynamic drag.

C. Aid in longitudinal balance when rolling an airplane into a turn.

A. Reduce the wings' lift upon landing.

22. Flaps have more effect on

A. thick wings.

B. thin wings.

C. symmetrical wings.

A. thick wings.

23. Which is a purpose of ground spoilers?

A. Reduce the wings' lift upon landing.

B. Aid in rolling an airplane into a turn.

C. Increase the rate of descent without gaining airspeed.

A. Reduce the wings' lift upon landing.

24. Split flaps as opposed to plain flaps

A. produce more lift with less drag.

B. produce only slightly more lift, but much more drag.

C. enhance takeoff performance in hot temperatures and high altitudes.

B. produce only slightly more lift, but much more drag.

25. Fowler flaps as compared to split flaps

A. generate more nose down pitching moment.

B. develop much less drag.

C. cause very little change in the airplane structure.

A. generate more nose down pitching moment.

26. Upon landing, spoilers

A. decrease directional stability on the landing rollout.

B. function by increasing tire to ground friction.

C. should be extended after the thrust reversers have been deployed.

B. function by increasing tire to ground friction.

27. One method of boundary layer control is accomplished by injecting

A. a jet of air into the leading edge to energize the boundary layer.

B. a low speed jet of air into the boundary layer.

C. a high speed jet of air into the boundary layer.

C. a high speed jet of air into the boundary layer.

28. On most airplanes, the first 50% of flap deflection causes

A. less than 50% of the total change in lift.

B. more than 50% of the total change in lift.

C. linear lift increases at the AFM specified speed.

B. more than 50% of the total change in lift.

29. Swept wings causes a significant

A. increase in effectiveness of flaps.

B. reduction in effectiveness of flaps.

C. flap actuation reliability issue.

B. reduction in effectiveness of flaps.

30. Compared to a straight wing, swept wing flaps are

A. as effective.

B. less effective.

C. more effective.

B. less effective.

31. What will be the ratio between airspeed and lift if the angle of attack and other factors remain constant and airspeed is doubled? Lift will be

A. the same.

B. two times greater.

C. four times greater.

C. four times greater.

32. What true airspeed and angle of attack should be used to generate the same amount of lift as altitude is increased?

A. The same true airspeed and angle of attack.

B. A higher true airspeed for any given angle of attack.

C. A lower true airspeed and higher angle of attack.

B. A higher true airspeed for any given angle of attack.

33. How can an airplane produce the same lift in ground effect as when out of ground effect?

A. The same angle of attack.

B. A lower angle of attack.

C. A higher angle of attack.

B. A lower angle of attack.

34. By changing the angle of attack of a wing, the pilot can control the airplane's

A. lift, gross weight, and drag.

B. lift, airspeed, and drag.

C. lift and airspeed, but not drag.

B. lift, airspeed, and drag.

35. In a jet powered airplane (fan or pure jet) the angle of attack at stall is

A. variable only with altitude.

B. very different from power on and power off.

C. essentially the same power on or power off.

C. essentially the same power on or power off.

36. An increase in airspeed above the stall speed will require

A. a relative decrease in the relative wind.

B. a corresponding decrease in angle of attack and co-efficient of lift.

C. a corresponding increase in co-efficient of lift and drag.

B. a corresponding decrease in angle of attack and co-efficient of lift.

37. Lift coefficient must be maximum at the

A. airplane stall speed.

B. airplane maximum maneuvering (VA) airspeed.

C. maximum mach operating limit (VMMO)

A. airplane stall speed.

38. When at high angle of attack the boundary layer tends to

A. stagnate and stop.

B. loop around the upper camber line.

C. decrease air pressure along the chord.

B. loop around the upper camber line.

39. What is the effect on total drag of an aircraft if the airspeed decreases in level flight below that speed for maximum L/D?

A. Drag increases because of increased induced drag.

B. Drag increases because of increased parasite drag.

C. Drag decreases because of lower induced drag.

A. Drag increases because of increased induced drag.

40. What performance is characteristic of flight at maximum L/D in a propeller-driven airplane?

A. Maximum range and distance glide.

B. Best angle of climb.

C. Maximum endurance.

A. Maximum range and distance glide.

41. What flight condition should be expected when an aircraft leaves ground effect?

A. An increase in induced drag requiring a higher angle of attack.

B. A decrease in parasite drag permitting a lower angle of attack.

C. An increase in dynamic stability.

A. An increase in induced drag requiring a higher angle of attack.

42. What is the relationship between induced and parasite drag when the gross weight is increased?

A. Parasite drag increases more than induced drag.

B. Induced drag increases more than parasite drag.

C. Both parasite and induced drag are equally increased.

B. Induced drag increases more than parasite drag.

43. If the boundary layer separates

A. drag will decrease.

B. the airflow separates from the wing surface and stall occurs.

C. ice will not sublimate in this area.

B. the airflow separates from the wing surface and stall occurs.

44. An airplane flying at L/DMAX will have

A. the same glide speed for all weights.

B. different glide ratios dependent on gross weight.

C. the same glide performance at all weights.

C. the same glide performance at all weights.

45. Any angle of attack lower or higher than L/DMAX

A. increases total drag.

B. requires less thrust for steady state flight.

C. means less maneuvering margin before stalling.

A. increases total drag.