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WorksheetsAerodynamics Quiz 1-40
Total questions: 40
Worksheet time: 20mins
The four forces acting on an airplane in flight are
Lift, weight, thrust, and drag
Lift, weight, gravity, and thrust
Lift, gravity, power, and friction
Which statement relates to Bernoulli’s principle?
air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface
For every action there is an equal and opposite reaction
An additional upward force is generated as the lower surface of the airfoil deflects air downward
When are the four forces that act on an airplane in equilibrium?
When the aircraft is accelerating
When the aircraft is at rest on the ground
During unaccelerated flight
Select the four flight fundamentals involved in the maneuvering an aircraft
Starting, taxiing, takeoff, and landing
Aircraft power, pitch, bank, and trim
Straight-and-level flight, turns, climbs, and descents
In flying the rectangular course, when would the aircraft be turned less than 90°?
Corners 1 and 4
Corners 2 and 4
Corners 1 and 2
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
1-2-3 because the bank is decreased too rapidly during the latter part of the turn
4-5-6 because the bank is increased too rapidly during the early part of the turn
4-5-6 because the bank is increased too slowly during the latter part of the turn
If an emergency situation requires a downwind landing, pilots should expect a faster
Airspeed at touchdown, a longer ground roll, and better control throughout the landing roll
Groundspeed at the touchdown, a shorter ground roll, and the likelihood of undershooting the desired touchdown point
Groundspeed at the touchdown, a longer ground roll, and the likelihood of overshooting the desired touchdown point
The acute angle A is the angle of
Attack
Incidence
Dihedral
The term ‘angle of attack’ is defined as the angle
Between the wing chord line and the relative wind
Between the airplane’s climb angle and horizon
Formed by the longitudinal axis of the airplane and the chord line of the wing
The angle between the chord line of an airfoil and the relative wind is known as the angle of
Lift
Attack
Incidence
What is the relationship of lift, drag, thrust, and weight when the airplane is in straight-and-level flight?
Lift equals weight and thrust equals drag
Lift and weight equal thrust and drag
Lift, drag, and weight equal thrust
An airplane said to be inherently stable will
Not spin
Be difficult to stall
Require less effort to control
What determines the longitudinal stability of an airplane?
The location of the CG with respect to the center of lift
The effectiveness of the horizontal stabilizer, rudder, and rudder trim tab
The relationship of thrust and lift to weight and drag
Changes in the center of pressure of a wing affect the aircraft’s
Lift/drag ratio
Aerodynamic balance and controllability
Lifting capacity
What causes an airplane (except a T-tail) to pitch nosedown when power is reduced and controls are not adjusted?
When thrust is reduced to less than weight, lift is also reduced and the wings can no longer support the weight
The CG shifts forward when thrust and drag are reduced
The downwash on the elevators from the propeller slipstream is reduced and elevator effectiveness is reduced
What is the purpose of the rudder on an airplane?
To control yaw
To control over banking tendency
To control roll
If an airplane weighs 2,300 pounds, what approximate weight would the airplane structure be required to support during the 60° banked turn while maintaining altitude?
2,300 pounds
4,600 pounds
3,400 pounds
If an airplane weighs 3,300 pounds, what approximate weight would the airplane structure be required to support during the 30° banker turn while maintaining altitude?
3,960 pounds
3,100 pounds
1,200 pounds
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?
7,200 pounds
4,500 pounds
6,750 pounds
The amount of excess load that can be imposed on the wing of an airplane depends upon the
Position of the CG
Speed of the airplane
Abruptness at which the load is applied
Which basic flight maneuver increases the load factor on an airplane as compared to straight-and-level flight?
Climbs
Turns
Stalls
One of the main functions of flaps during approach and landing is to
Increase the angle of decent without increasing the airspeed
Decrease the angle of descent without increasing the airspeed
Permit a touchdown at a higher indicated airspeed
What is one purpose of wing flaps?
To enable the pilot to make steeper approaches to a landing without increasing the airspeed
to relieve the pilot of maintaining continuous pressure on the controls
To decrease wing area to vary the lift
As altitude increases, the indicated airspeed at which a given airplane stalls in a particular configuration will
Decrease as the true airspeed increases
Decrease as the true airspeed decreases
Remain the same regardless of altitude
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 longer takeoff run
Difficulty in recovering from a stalled condition
Stalling at higher-than-normal airspeed
Loading an airplane to the most aft CG will cause the airplane to be
Less stable at all speeds
Less stable at slow speeds, but more stable at high speeds
Less stable at high speeds, but more stable at low speeds
What force makes an airplane turn?
Centrifugal force
The horizontal component of lift
The vertical component of lift
In what flight condition must an aircraft be placed in order to spin?
Stalled
Partially stalled with one wing low
In a steep diving spiral
During a spin to the left, which wing(s) is/are stalled?
Both wings are stalled
Neither wing is stalled
Only the left wing is stalled
The angle of attack at which an airplane wing stalls will
Change with an increase in gross weight
Increase if the CG is moved forward
Remain the same regardless of gross weight
What is ground effect?
The result of the interference of the surface of the Earth with the airflow patterns about an airplane
The result of an alteration in airflow patterns increasing induced drag about the wings of an airplane
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
Floating caused by the phenomenon of ground effect will be most realized during an approach to land when at
Twice the length of the wingspan above the surface
A higher-than-normal angle of attack
Less than twice the length of the wingspan above the surface
What must a pilot be aware of as a result of ground effect?
Wingtip vortices increase creating wake turbulence problems for arriving and departing aircraft
Induced drag deceases; therefore, any excess speed at the point of flare may cause considerable floating
A full stall landing will require less up elevator deflection than would a full stall when done free of ground effect
Ground effect is most likely to result in which problem?
Settling to the surface abruptly during landing
Becoming airborne before reaching recommended takeoff speed
Inability to get airborne even though airspeed is sufficient for normal takeoff needs
During an approach to a stall, an increased load factor will cause the airplane to
Be more difficult to control
Have a tendency to spin
Stall at a higher airspeed
The term angle of attack is defined as the angle between the
Chord line of the wing and the relative wind
Airplane’s longitudinal axis and that of the air striking the airfoil
Airplane’s center line and the relative wind
Wingtip vortices are created only when an aircraft is
Operating at high airspeeds
Developing lift
Heavily loaded
The greatest vortex strength occurs when the generating aircraft is
Light, dirty, and fast
Heavy, clean, and slow
Heavy, dirty, and fast
Wingtip vortices created by large aircraft tend to
Sink below the aircraft generating turbulence
Rise into the traffic pattern
Rise into the takeoff or landing path of a crossing runway
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
Rise from a crossing runway into the takeoff or landing path
Rise into the traffic pattern area surrounding the airport
Sink into the flightpath of aircraft operating below the aircraft generating the turbulence
