CAP Ground School Aerodynamics Study Questions

What is the relationship of lift, drag, thrust, and weight when the aircraft is in straight-and-level flight? A. Lift equals weight and thrust equals drag. B. Lift, drag, and weight equal thrust. C. Lift and weight equal thrust and drag.

A. Lift equals weight and thrust equals drag.

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 attach. C. High airspeed, high power, high angle of attack.

A. Low airspeed, high power, high angle of attack.

Which device is a secondary fligh control? A. Spoilers. B. Ailerons C. Stabilators

A. Spoilers.

When landing behind a large aircraft, which procedure should be followed for vortex? A. Stay above its final approach flighpath all the way to touchdown. B. Stay below and to one side of its final approach flightpath C. Stay well below its final approach flightpath and land at least 2,000 feet behind.

A. Stay above its final approach flighpath all the way to touchdown.

The angle of attack for a propeller is defined as A. The angle between the propeller chord line and the relative wind. B. The angle between the propeller chord line and the thrust vector. C. The pitch angle of the blade to the propeller hub.

A. The angle between the propeller chord line and the relative wind.

What force makes an airplane turn? A. The horizontal component of lift. B. The vertical component of lift. C. Centrifugal force.

A. The horizontal component of lift.

What is ground effect? A. The result of the interference of the surface of the earth with the airflow patterns about an airplane. B. The result of an alteration in airflow patterns increasing induced drag about the wings of an airplane. C. 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.

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

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.

What is the purpose of the rudder on an airplane? A. To control yaw. B. To control over-banking tendency. C. To control roll.

A. To control yaw.

What is one purpose of wing flaps? A. To enable the pilot to make steeper approaches to landing without increasing the airspeed. B. To relieve the pilot of maintaining continuous pressure on the controls. C. To decrease wing area to vary the lift.

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

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,l thrust, and drag.

During an approach to a stall an increased load factor will cause the airplane to A. stall at a higher airspeed. B. have a tendency to spin C. be more difficult to control.

A. stall at a higher airspeed.

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 A. longer takeoff run B. difficulty recovering from a stalled condition. C. stalling at higher-than-normal airspeed.

B. difficulty recovering from a stalled condition.

An airplane said to be inherently stable will A. be difficult to stall. B. require less effort to control. C. not spin

B. require less effort to control.

The amount of excess load that can be imposed on the wing of an airplane depends upon the A. position of the CG B. speed of the airplane. C. abruptness at which the load is applied.

B. speed of the airplane.

(Refer to Figure 1) The acute angle A is the angle of A. incidence B. attack c. dihedral

B. attack

Ground effect is most likely to result in which problem? A. Settling to the surface abruptly during landing. B. Becoming airborn before reaching recommended takeoff speed. C. Inability to get airborne even though airspeed is sufficient for normal takeoff needs.

B. Becoming airborn before reaching recommended takeoff speed.

The elevator controls movement around which axis? A. Longitudinal B. Lateral C. Vertical

B. Lateral

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 counter-clockwise. 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 degree 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.

Which basic flight maneuver increases the load factor on an airplane as compared to straight-and-level flight? A. Climbs. B. Turns. C. Stalls

B. Turns.

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.

(Refer to Figure 2.) 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? A. 2,300 pounds B. 3,400 pounds C. 4,600 pounds

C. 4,600 pounds

Which statement relates to Bernoulli's Principle? A. For every action there is an equal and opposite reation. 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.

In what flight condition must an aircraft be placed in order to spin? A. Partially stalled with one wing low. B. In a steep diving spiral C. Stalled.

C. Stalled.

As altitude increases, the indicated airspeed at which a given airplane stalls in a particular configuration will A. decrease as the true airspeed decreases. B. decrease as the true airspeed increases. C. remain the same regardless of altitude.

C. remain the same regardless of altitude.