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 device is a secondary flight control

Answer 6

(Spoilers)
Ailerons
Stabilator

Question 7

Trim systems are designed to do what?

Answer 7

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

Question 8

The four forces acting on an airplane in flight are?

Answer 8

Lift weight thrust and drag

Question 9

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

Answer 9

During an unaccelerated level flight

Question 10

What is the relationship of left drag thrust and wait on the airplane is a straight and level flight?

Answer 10

Left equals weight and thrust equals drag

Question 11

Which is Bernoulli’s principle?

Answer 11

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

Question 12

The term angle of attack is defined as the angle between the

Answer 12

Cord line of the wing and relative wind

Question 13

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

Answer 13

Direction of the relative wind

Question 14

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

Answer 14

Attack

Question 15

The angle of attack at which an airplane wing stalls will?

Answer 15

Remain the same regardless of gross weight

Question 16

As altitude increases the indicated airspeed at which a given airplay stalls in a particular configuration will?

Answer 16

Will Remain the same regardless of altitude

Question 17

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

Answer 17

Stalled

Question 18

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

Answer 18

Frost will disrupt the smooth flow of air over the wing adversely affecting it’s from lifting capability

Question 19

Why is frost considered hazardous to flight?

Answer 19

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

Question 20

How does frost affect the lifting surface of an airplane on Takeoff?

Answer 20

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

Question 21

What is ground effect?

Answer 21

The result of the interference of the surface of the earth with the air flow patterns about an airplane

Question 22

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

Answer 22

Less than the length of the wingspan above the surface

Question 23

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

Answer 23

Induced drag decreases therefore any excess speed at the point of flair may cause considerable floating

Question 24

An aircraft leaving grand affect during Takeoff will

Answer 24

Require an increase in angle of attack to maintain the same lift coefficient

Question 25

Ground effect is most likely to result in which problem?

Answer 25

Becoming airborne before reaching recommend take off speed

Question 26

What force makes an airplane turn?

Answer 26

The horizontal component of lift

Question 27

An airplane said to be inherently stable will?

Answer 27

Require less effort to control

Question 28

What determines the longitudinal stability of an airplane

Answer 28

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

Question 29

Changes in the center of pressure of a wing affect the Aircraft’s

Answer 29

Arrow dynamic balance and controllability

Question 30

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 30

Difficulty in recovering from a stalled condition

Question 31

What causes an airplane to pitch nose down when power is reduced and controls are not adjusted?

Answer 31

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

Question 32

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

Answer 32

Less stable at all speeds

Question 33

What is the effect of advancing the throttle in flight?

Answer 33

Both aircraft ground speed and angle of attack will increase

Question 34

In what flight condition are torque affects more pronounced in a single engine airplane?

Answer 34

Low air speed, high power, high angle of attack

Question 35

The left turning tendency of an airplane causedby P-factor is the result of the

Answer 35

Propeller blade descending on the right producing more threats than the asending blade on the left

Question 36

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

Answer 36

When at high angles of attack

Question 37

The amount of excess load imposed on the wing airplane depends upon the?

Answer 37

Speed of the airplane

Question 38

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

Answer 38

Turns

Question 39

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

Answer 39

Stall at a higher airspeed