Aerodynamics Questions
11 (3205)- What is the relationship of lift, drag, thrust, and weight when the airplane is in straight-and-level flight? A- Lift equals weight and thrust equals drag. B- Lift, drag, and weight equal thrust. C- Lift and weight equal thrust and drag.
A
13 (3211)- 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.
A
16 (3213)- What is the purpose of the rudder on an airplane? A- To control yaw. B- To control overbanking tendency. C- To control roll.
A
23 (3220)- What is one purpose of wing flaps? A- To enable the pilot to make steeper approaches to a landing without increasing the airspeed. B- To relieve the pilot of maintaining continuous pressure on the controls. C- To decrease wing area to vary the lift.
A
26 (3288)- Loading an airplane to the most aft CG will cause the airplane to be A- less stable at all speeds. B- less stable at slow speeds, but more stable at high speeds. C- less stable at high speeds, but more stable at low speeds.
A
27 (3301)- What force makes an airplane turn? A- The horizontal component of lift. B- The vertical component of lift. C- Centrifugal force.
A
29 (3310)- During a spin to the left, which wing(s) is/are stalled? A- Both wings are stalled. B- Neither wing is stalled. C- Only the left wing is stalled.
A
31 (3312)- What 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 will no longer support the airplane in flight.
A
32 (3313)- Floating caused by the phenomenon of ground effect will be most realized during an approach to land when at A- less than the length of the wingspan above the surface. B- twice the length of the wingspan above the surface. C- a higher-than-normal angle of attack.
A
35 (3316)- During an approach to a stall, an increased load factor will cause the airplane to A- stall at a higher airspeed. B- have a tendency to spin. C- be more difficult to control.
A
36 (3317)- The term "angle of attack" is defined as the angle between the A- 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.
A
39 (3826)- Wingtip vortices created by large aircraft tend to A- sink below the aircraft generating turbulence. B- rise into the traffic pattern. C- rise into the takeoff or landing path of a crossing runway.
A
42 (3829)- When landing behind a large aircraft, the pilot should avoid wake turbulence by staying A- above the large aircraft's final approach path and landing beyond the large aircraft's touchdown point. B- below the large aircraft's final approach path and landing before the large aircraft's touchdown point. C- above the large aircraft's final approach path and landing before the large aircraft's touchdown point.
A
43 (3829.2)- When landing behind a large aircraft, which procedure should be followed for vortex avoidance? A- Stay above its final approach flightpath all the way to touchdown. B- Stay below and to one side of its final approach flightpath. C- Stay well below its final approach flightpath and land at least 2,000 feet behind.
A
5 (3202.2)- (Refer to figure 62.) In flying the rectangular course, when would the aircraft be turned less than 90°? A- Corners 1 and 4. B- Corners 1 and 2. C- Corners 2 and 4.
A- Corners 1 and 4.
3 (3202)- When 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.
A- During unaccelerated flight.
9 (3204)- 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 and the chord line of the wing.
A- between the wing chord line and the relative wind.
1 (3201)- The four forces acting on an airplane in flight are A- lift, weight, thrust, and drag. B- lift, weight, gravity, and thrust. C- lift, gravity, power, and friction.
A- lift, weight, thrust, and drag.
12 (3210)- An airplane said to be inherently stable will A- be difficult to stall. B- require less effort to control. C- not spin.
B
15 (3212)- 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.
B
19 (3216)- (Refer to Figure 2.) If an airplane weighs 4,500 pounds, what approximate weight would the airplane structure be required to support during a 45° banked turn while maintaining altitude? A- 4,500 pounds. B- 6,750 pounds. C- 7,200 pounds.
B
20 (3217)- The amount of excess load that can be imposed on the wing of an airplane depends upon the A- position of the CG. B- speed of the airplane. C- abruptness at which the load is applied.
B
21 (3218)- Which basic flight maneuver increases the load factor on an airplane as compared to straight-and-level flight? A- Climbs. B- Turns. C- Stalls.
B
25 (3287)- An airplane has been loaded in such a manner that the CG is located aft of the aft CG limit. One undesirable flight characteristic a pilot might experience with this airplane would be A- a longer takeoff run. B- difficulty in recovering from a stalled condition. C- stalling at higher-than-normal airspeed.
B
33 (3314)- What 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 will require less up elevator deflection than would a full stall when done free of ground effect.
B
34 (3315)- Ground effect is most likely to result in which problem? A- Settling 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.
B
41 (3828)- The wind condition that requires maximum caution when avoiding wake turbulence on landing is a A- light, quartering headwind. B- light, quartering tailwind. C- strong headwind.
B
45 (3830)- When departing behind a heavy aircraft, the pilot should avoid wake turbulence by maneuvering the aircraft A- below and downwind from the heavy aircraft. B- above and upwind from the heavy aircraft. C- below and upwind from the heavy aircraft.
B
6 (3202.3)- (Refer to figure 66.) While practicing S-turns, a consistently smaller half-circle is made on one side of the road than on the other, and this turn is not completed before crossing the road or reference line. This would most likely occur in turn A- 1-2-3 because the bank is decreased too rapidly during the latter part of the turn. B- 4-5-6 because the bank is increased too rapidly during the early part of the turn. C- 4-5-6 because the bank is increased too slowly during the latter part of the turn.
B- 4-5-6 because the bank is increased too rapidly during the early part of the turn.
10 (3204.1)- The angle between the chord line of an airfoil and the relative wind is known as the angle of A- lift. B- attack. C- incidence.
B- attack.
8 (3203)- (Refer to Figure 1.) The acute angle A is the angle of A- incidence. B- attack. C- dihedral.
B- attack.
7 (3202.4)- If an emergency situation requires a downwind landing, pilots should expect a faster A- airspeed at touchdown, a longer ground roll, and better control throughout the landing roll. B- groundspeed at touchdown, a longer ground roll, and the likelihood of overshooting the desired touchdown point. C- groundspeed at touchdown, a shorter ground roll, and the likelihood of undershooting the desired touchdown point.
B- groundspeed at touchdown, a longer ground roll, and the likelihood of overshooting the desired touchdown point.
14 (3211.1)- Changes in the center of pressure of a wing affect the aircraft`s A- lift/drag ratio. B- lifting capacity. C- aerodynamic balance and controllability.
C
17 (3214)- (Refer to Figure 2.) If an airplane weighs 2,300 pounds, what approximate weight would the airplane structure be required to support during a 60° banked turn while maintaining altitude? A- 2,300 pounds. B- 3,400 pounds. C- 4,600 pounds.
C
18 (3215)- (Refer to Figure 2.) If an airplane weighs 3,300 pounds, what approximate weight would the airplane structure be required to support during a 30° banked turn while maintaining altitude? A- 1,200 pounds. B- 3,100 pounds. C- 3,960 pounds.
C
22 (3219)- One of the main functions of flaps during approach and landing is to A- decrease the angle of descent without increasing the airspeed. B- permit a touchdown at a higher indicated airspeed. C- increase the angle of descent without increasing the airspeed.
C
24 (3263)- As altitude increases, the indicated airspeed at which a given airplane stalls in a particular configuration will A- decrease as the true airspeed decreases. B- decrease as the true airspeed increases. C- remain the same regardless of altitude.
C
28 (3309)- In what flight condition must an aircraft be placed in order to spin? A- Partially stalled with one wing low. B- In a steep diving spiral. C- Stalled.
C
30 (3311)- The angle of attack at which an airplane wing stalls will A- increase if the CG is moved forward. B- change with an increase in gross weight. C- remain the same regardless of gross weight.
C
37 (3824)- Wingtip vortices are created only when an aircraft is A- operating at high airspeeds. B- heavily loaded. C- developing lift.
C
38 (3825)- The greatest vortex strength occurs when the generating aircraft is A- light, dirty, and fast. B- heavy, dirty, and fast. C- heavy, clean, and slow.
C
40 (3827)- When taking off or landing at an airport where heavy aircraft are operating, one should be particularly alert to the hazards of wingtip vortices because this turbulence tends to A- rise from a crossing runway into the takeoff or landing path. B- rise into the traffic pattern area surrounding the airport. C- sink into the flightpath of aircraft operating below the aircraft generating the turbulence.
C
44 (3829.3)- How does the wake turbulence vortex circulate around each wingtip? A- Inward, upward, and around each tip. B- Inward, upward, and counterclockwise. C- Outward, upward, and around each tip.
C
46 (3202.5)- When executing an emergency approach to land in a single-engine airplane, it is important to maintain a constant glide speed because variations in glide speed A- increase the chances of shock cooling the engine. B- assure the proper descent angle is maintained until entering the flare. C- nullify all attempts at accuracy in judgment of gliding distance and landing spot.
C
2 (3201.1)- Which 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.
C- Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface
4 (3202.1)- Select the four flight fundamentals involved in maneuvering an aircraft. A- Aircraft power, pitch, bank, and trim. B- Starting, taxiing, takeoff, and landing. C- Straight-and-level flight, turns, climbs, and descents.
C- Straight-and-level flight, turns, climbs, and descents.
