Airplanes And Aerodynamics

Question 1

What is one purpose of wing flaps?

Answer 1

To enable the pilot to make steeper approaches to a landing without increasing the airspeed.

Question 2

One of the main functions of flaps during approach and landing is to?

Answer 2

Increase the angle of descent without increasing the airspeed.

Question 3

What is the purpose of the rudder on an airplane?

Answer 3

To control yaw.

Question 4

Which is not a primary flight control surface?

Answer 4

Flaps

Question 5

The elevator controls movement around which axis?

Answer 5

Lateral

Question 6

Which statement is true concerning primary flight controls?

Answer 6

The effectiveness of each control surface increases with speed because there is more flow over them.

Question 7

Which of the following is true concerning flaps?

Answer 7

Flaps allow an increase in the angle of descent without increasing airspeed.

Question 8

Which device is a secondary flight control?

Answer 8

Spoilers.

Question 9

Trim systems are designed to do what?

Answer 9

They relieve the pilot of the need to maintain constant back pressure on the flight controls.

Question 10

The four forces acting on an airplane in flight are?

Answer 10

lift, weight, thrust, and drag

Question 11

When are the four forces that act on an airplane in equilibrium?

Answer 11

During un-accelerated flight

Question 12

What is the relationship of lift, drag, thrust, and weight when the airplane is in straight and level flight?

Answer 12

lift equals weight and thrust equals drag

Question 13

Which statement relates to Bernoulli’s principle?

Answer 13

Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface.

Question 14

The term “angle of attack” is defined as the angle…

Answer 14

between the wing chord line and the relative wind.

Question 15

Angle of attack is defined as the angle between the chord line of an airfoil and the

Answer 15

direction of the relative wind

Question 16

The angle between the chord line of an airfoil and the relative wind is known as the angle of

Answer 16

attack.

Question 17

The angle of attack at which an airplane wing stalls will

Answer 17

remain the same regardless of gross weight

Question 18

As altitude increases, the indicated airspeed at which a given airplane stalls in a particular configuration will

Answer 18

remain the same regardless of altitude

Question 19

In what flight condition must an aircraft be placed in order to spin?

Answer 19

Stalled

Question 20

During a spin to the left, which wing(s) is/are stalled?

Answer 20

Both wings are stalled

Question 21

How will frost on the wings of an airplane effect takeoff performance?

Answer 21

Frost will disrupt the smooth flow of air over the wing, adversely affecting its lifting capability

Question 22

Why is frost considered hazardous to flight?

Answer 22

Frost spoils the smooth flow of air over the wings, thereby decreasing lifting capability

Question 23

How does frost affect the lifting surfaces of an airplane on takeoff?

Answer 23

Frost may prevent the airplane from becoming airborne at normal takeoff speed

Question 24

What is ground effect?

Answer 24

The result of the interference of the surface of the Earth with the airflow patterns about an airplane/

Question 25

Floating caused by the phenomenon of ground effect will be most realized during an approach to land when at?

Answer 25

Less than the length of the wingspan above the surface

Question 26

What must a pilot be aware of as a result of ground effect?

Answer 26

Induced drag decreases; therefore any excess speed at the point of flare may cause considerable floating.

Question 27

Ground effect is most likely to result in which problem?

Answer 27

Becoming airborne before reaching recommended takeoff speed

Question 28

What force makes an airplane turn?

Answer 28

The horizontal component of lift

Question 29

An airplane said to be inherently stable will?

Answer 29

Require less effort to control

Question 30

What determines the longitudinal stability of an airplane?

Answer 30

The location of the CG with respect to the center of lift

Question 31

Changes in the center of pressure of a wing affect the aircraft’s…

Answer 31

Aerodynamic balance and controllability

Question 32

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.

Answer 32

difficulty in recovering from a stalled condition

Question 33

What causes an airplane (except a T-tail) to pitch nose down when power is reduced and controls are not adjusted?

Answer 33

The down wash on the elevators from the propeller slipstream is reduced and elevator effectiveness is reduced

Question 34

Loading an airplane to the most aft CG will cause the airplane to be?

Answer 34

less stable at all speeds

Question 35

In what flight condition is torque effect the greatest in a single-engine airplane?

Answer 35

Low airspeed, high power, high angle of attack

Question 36

The left turning tendency of an airplane caused by P-factor is the result of the…

Answer 36

propeller blade descending on the right, producing more thrust than the ascending blade on the left

Question 37

When does P-factor cause the airplane to yaw to the left?

Answer 37

When at high angles of attack

Question 38

The amount of excess load that can be imposed on the wing of an airplane depends on the…

Answer 38

speed of the airplane

Question 39

Which basic flight maneuver increases the load factor on an airplane as compared to straight-and-level flight?

Answer 39

Turns

Question 40

During an approach to a stall, an increased load factor will cause the aircraft to….

Answer 40

stall at a higher speed