Why Airplanes Fly Flashcards
Which is not a primary flight control surface?
A. Flaps.
B. Stabilator (or elevator).
C. Ailerons.
A. Flaps
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 very the lift.
A. To enable the pilot to make steeper approaches to a landing without increasing the airspeed.
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. increase the angle of descent without increasing the airspeed.
What is the purpose of the rudder on an airplane?
A. To control yaw.
B. To control overbanking tendency.
C. To control roll.
A. To control yaw.
The elevator controls movement around which axis?
A. Longitudinal.
B. Lateral.
C. Vertical.
B. Lateral
Which of the following is true concerning flaps?
A. Flaps are attached to the landing edge of the wing and are used to increase wing lift.
B. Flaps allow an increase in the angle of descent without increasing airspeed.
C. Flaps are high drag devices deployed from the wings to reduce lift.
B. Flaps allow an increase in the angle of descent without increasing airspeed.
Which device is a secondary flight control?
A. Spoilers.
B. Ailerons.
C. Stabilators.
A. Spoilers.
Trim systems are designed to do what?
A. They relieve the pilot of the need to maintain constant back pressure on the flight controls.
B. They are used during approach and landing to increase wing lift.
C. They move in the opposite direction from one another to control roll.
A. They relieve the pilot of the need to maintain constant back pressure on the flight controls.
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.
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.
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.
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. the airplane’s center line and the relative wind.
A. chord line of the wing and the relative wind.
When does P-factor cause the airplane to yaw to the left?
A. When at low angles of attack.
B. When at high angles of attack.
C. When at high airspeeds.
B. When at high angles of attack.
The left turning tendency of an airplane caused by P-factor is the result of the
A. clockwise rotation of the engine and the propeller turning the airplane counterclockwise.
B. propeller blade descending on the right, producing more thrust than the ascending blade on the left.
C. gyroscopic forces applied to the rotating propeller blades acting 90° in advance of the point the force was applied.
B. propeller blade descending on the right, producing more thrust than the ascending blade on the left.
In what flight condition is torque effect the greatest in a single-engine airplane?
A. Low airspeed, high power, high angle of attack.
B. Low airspeed, low power, low angle of attack.
C. High airspeed, high power, high angle of attack.
A. Low airspeed, high power, high angle of attack.
