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- 1. Multiple ChoiceThe four forces acting on an airplane in flight areA – lift, weight, thrust, and drag.B – lift, weight, gravity, and thrust.C – lift, gravity, power, and friction.
- 2. Multiple ChoiceWhen are the four forces that act on an airplane in equilibrium?A – During unaccelerated flight.B – When the aircraft is accelerating.C – When the aircraft is at rest on the ground.
- 3. Multiple Choice
(Refer to Figure 1.) The acute angle A is the angle of
A – incidence.
B – attack.
C – dihedral.
- 4. Multiple ChoiceThe term “angle of attack” is defined as the angle between theA – chord line of the wing and the relative wind.B – airplane’s longitudinal axis and that of the air striking the airfoil.C – airplane’s center line and the relative wind.
- 5. Multiple ChoiceThe angle between the chord line of an airfoil and the relative wind is known as the angle ofA – lift.B – attack.C – incidence.
- 6. Multiple ChoiceWhat is the relationship of lift, drag, thrust, and weight when the airplane is in straight-and-level flight?A – Lift, drag, and weight equal thrust.B – Lift and weight equal thrust and drag.C – Lift equals weight and thrust equals drag.
- 7. Multiple ChoiceOne of the main functions of flaps during approach and landing is toA – decrease the angle of descent without increasing the airspeed.B – enable a touchdown at a higher indicated airspeed.C – increase the angle of descent without increasing the airspeed.
- 8. Multiple ChoiceWhat is one purpose of wing flaps?A – To decrease wing area to vary the lift.B – To relieve the pilot of maintaining continuous pressure on the controls.C – To enable the pilot to make steeper approaches to a landing without increasing the airspeed.
- 9. Multiple ChoiceThe angle of attack at which an airplane wing stallsA – increases if the CG is moved forward.B – changes with an increase in gross weight.C – remains the same regardless of gross weight.
- 10. Multiple ChoiceWhat is ground effect?A – The result of the interference of the surface of the Earth with the airflow patterns about an airplane.B – The result of an alteration in airflow patterns increasing induced drag about the wings of an airplane.C – The result of the disruption of the airflow patterns about the wings of an airplane to the point where the wings can no longer support the airplane in flight.
- 11. Multiple ChoiceFloating caused by the phenomenon of ground effect is most realized during an approach to land when atA – a higher-than-normal angle of attack.B – less than the length of the wingspan above the surface.C – twice the length of the wingspan above the surface.
- 12. Multiple ChoiceWhat must a pilot be aware of as a result of ground effect?A – Wingtip vortices increase, creating wake turbulence problems for arriving and departing aircraft.B – Induced drag decreases; therefore, any excess speed at the point of flare may cause considerable floating.C – A full stall landing requires less up elevator deflection than a full stall that is done free of ground effect.
- 13. Multiple ChoiceGround effect is most likely to result in which problem?A – Setting to the surface abruptly during landing.B – Becoming airborne before reaching recommended takeoff speed.C – Inability to get airborne even though airspeed is sufficient for normal takeoff needs.
- 14. Multiple ChoiceWhich statement relates to Bernoulli’s principle?A – For every action there is an equal and opposite reaction.B – An additional upward force is generated as the lower surface of the wing deflects air downward.C – Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface.
- 15. Multiple ChoiceChanges in the center of pressure of a wing affect the aircraft’sA – lift/drag ratio.B – lifting capacity.C – aerodynamic balance and controllability.
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