Basic Aerodynamics

Question 1

The acute angle A is the angle of:

Answer 1

Attack

Question 2

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

Answer 2

Between the wing chord line and the relative wind.

Question 3

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

Answer 3

Attack.

Question 4

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

Answer 4

Direction of the relative wind.

Question 5

Which statement related to Bernoulli’s Principle:

Answer 5

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

Question 6

The four forces acting on an airplane in flight are:

Answer 6

Lift

Weight

Thrust

Drag

Question 7

What is the purpose of a rudder on an airplane?

Answer 7

To control yaw.

Question 8

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

Answer 8

Lift equals weight and thrust equals drag.

Question 9

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

Answer 9

During unaccelerated flight.

Question 10

An airplane said to be inherently stable will:

Question 11

What determines the longitudinal stability of an airplane?

Answer 11

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

Question 12

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

Answer 12

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

Question 13

An airplane has been loaded in such a manner that the CG is located aft of the CG limit. One undesirable flight characteristic a pilot might experience with this airplane would be:

Answer 13

Difficulty in recovering from a stalled condition.

Question 14

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

Answer 14

Less stable at all speeds.

Question 15

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

Answer 15

Aerodynamic balance and controllability.

Question 16

If an airplane weighs 2,300 pounds, what approximate weight would the airplane structure be required to support during a 60 degree banked turn while maintaining altitude?

Answer 16

4,600 pounds.

Question 17

If an airplane weighs 3,300 pounds, what approximate weight would the airplane structure be required to support during a 30 degree banked turn while maintaining altitude?

Answer 17

3,960 pounds.

Question 18

If an airplane weighs 4,500 pounds, what approximate weight would the airplane structure be required to support during a 45 degree banked turn while maintaining altitude?

Answer 18

6,750 pounds.

Question 19

The ammount of excess load that can be imposed on the wing of an airplane depends upon the:

Answer 19

Speed of the airplane.

Question 20

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

Answer 20

Turns.

Question 21

What force makes an airplane turn?

Answer 21

The horizontal component of lift.

Question 22

During an approach to a stall, an increased load factor will cause the airplane to:

Answer 22

Stall at a higher airspeed.

Question 23

Select the four flight fundamentals involved in maneuvering an aircraft:

Answer 23

Straight and level flight

Turns

Climbs

Descents

Question 24

While practicing S-turns, a consistently smaller half-circle is made on one side of the road than on the other, and this tun is not completed before crossing the road or reference line. This would most likely occur in:

Answer 24

4-5-6 because the bank is increased too rapidly during the early part of the turn.

Question 25

If an emergency situation requires a downwind landing, pilots should expect a faster:

Answer 25

Groundspeed at touchdown, a longer ground roll, and the likelihood of overshooting the desired touchdown point.

Question 26

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

Answer 26

Remain the same regardless of altitude.

Question 27

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

Answer 27

Stalled.

Question 28

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

Answer 28

Both wings are stalled.

Question 29

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

Answer 29

Remain the same regardless of gross weight.

Question 30

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

Answer 30

Increase the angle of descent without increasing the airspeed.

Question 31

What is one purpose of wing flaps?

Answer 31

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

Question 32

Ground effect is most likely to result in which problem?

Answer 32

Becoming airborne before reaching recommended takeoff speed.

Question 33

What is ground effect?

Answer 33

The result of the interference of the surface of the earth with the airflow pattern about an airplane.

Question 34

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

Answer 34

Less than the length of the wingspan above the surface.

Question 35

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

Answer 35

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

Question 36

When landing behind a large aircraft, which procedure should be followed for vortex avoidance?

Answer 36

Stay above its final approach flightpath all the way to touchdown.

Question 37

How does the wake turbulence vortex circulate around each wingtip?

Answer 37

Outward, upward, and around each tip.

Question 38

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:

Answer 38

Sink into the flightpath of aircraft operating below the aircraft generating the turbulence.

Question 39

Wingtip vortices are created only when an aircraft is:

Answer 39

Developing lift.

Question 40

The greatest vortex strength occurs when the generating aircraft is:

Question 41

Wingtip vortices created by large aircraft tend to:

Question 42

The wind condition that requires maximum caution when avoiding wake turbulence on landing is a:

Answer 42

Light, quartering tailwind.

Question 43

When landing behind a large aircraft, the pilot should avoid wake turbulence by staying:

Answer 43

Above the aircraft's final approach path and landing beyond the large aircraft's touchdown point.

Question 44

When departing behind a heavy aircraft, the pilot should avoid wake turbulence by maneuvering the aircraft:

Answer 44

Above and upwind from the heavy aircraft.