NEW
Font size
WorksheetsM1 Quiz Aerodynamics
Total questions: 30
Worksheet time: 15mins
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?
For every action there is an equal but opposite reaction.
An additional upward force is generated as the lower surface of the airfoil deflects air downward.
Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface.
When are the four forces that act on an airplane in equilibrium?
During unaccelerated flight.
When the aircraft is accelerating.
When the aircraft is at rest on the ground.
Select the four fundamentals involved in maneuvering an aircraft.
Aircraft power, pitch, bank and trim.
Starting, taxiing, takeoff and landing.
Straight-and-level flight, turns, climbs and descents.
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 touchdown, a longer ground roll and the likelihood of overshooting the desired touchdown point.
groundspeed at touchdown, a shorter ground roll and the likelihood of undershooting the desired touchdown point.
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
increase the chances of shock cooling the engine.
assure the proper descent angle is maintained until entering the flare.
nullify all attempts at accuracy in judgement of gliding distance and landing spot.
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 the 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, drag and weight equal thrust.
Lift and weight equal thrust and drag.
An airplane said to be inherently stable will
be difficult to stall.
require less effort to control.
not spin.
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.
lifting capacity.
aerodynamic balance and controllability.
What causes an airplane (except a T-tail) to pitch nose down when power is reduced and controls are not adjusted?
The CG shifts forward when thrust and drag are reduced.
The downwash on the elevators from the propeller slipstream is reduces and elevator effectiveness is reduced.
When thrust is reduced to less than weight, lift is also reduced and the wings can no longer support the weight.
What is the purpose of the rudder on an airplane?
To control yaw
To control overbanking tendency
To control roll
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.
What 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
decrease the angle of descent without increasing the airspeed.
permit a touchdown at a higher indicated airspeed.
increase the angle of descent without increasing the 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 the wing area to vary lift.
As altitude increases, the indicated airspeed at which a given airplane stalls in a particular configuration will
decrease as the true airspeed decreases.
decrease as the true airspeed increases.
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 low speeds.
Less stable at high speeds, but more stable at low speeds.
What force makes an airplane turn?
The horizontal component of lift.
The vertical component of lift.
Centrifugal force
In what flight condition must an aircraft be placed in order to spin?
Partially stalled with one wing low.
In a steep diving spiral.
Stalled.
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
increase if the CG is moved forward.
change with an increase in gross weight.
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
less than the length of the wingspan above the surface.
twice the length of the wingspan above the surface.
a higher-than-normal angle of attack.
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 decreases; therefore, any excess speed at the point of flare may cause considerable floating.
A full stall landing flare may require less up elevator deflection than would a full stall when done free of ground effect.
g
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
stall at a higher airspeed.
have a tendency to spin
be more difficult to control
