Question 1

The acute angle formed by the chord line of a wing and the relative wind is known as the

 - - longitudinal dihedral angle.
 - - angle of incidence.
 - - angle of attack.

Accepted Answer

angle of attack

Question 2

Wing dihedral, a rigging consideration on most airplanes of conventional design, contributes most to stability of the airplane about its

 - - longitudinal axis.
 - -vertical axis.
- - lateral axis.

Accepted Answer

lateral axis

Question 3

Other than the manufacturer maintenance manual what other document could be used to determine the primary flight control surface deflection for an imported aircraft that is reassembled after shipment?

 - - Aircraft type certificate data sheet.
 - - Import manual for the aircraft.
 - - The certificate of airworthiness issued by the importing country.

Accepted Answer

Aircraft type certificate data sheet.

Question 4

If a pilot reports that an airplane flies left wing heavy, this condition may be corrected by

 - - increasing the angle of incidence of the left wing or decreasing the angle of incidence of the right wing, or both.
 - - increasing the dihedral angle of the left wing, or decreasing the dihedral angle of the right wing, or both.
 - - adjusting the dihedral angle of the left wing so that differential pressure between the upper and lower wing surfaces is increased.

Accepted Answer

increasing the angle of incidence of the left wing or decreasing the angle of incidence of the right wing, or both.

Question 5

If the vertical fin of a single-engine, propeller-driven airplane is rigged properly, it will generally be parallel to

 - - the longitudinal axis but not the vertical axis.
 - - the vertical axis but not the longitudinal axis.
 - - both the longitudinal and vertical axes.

Accepted Answer

the vertical axis but not the longitudinal axis.

Question 6

An airplane which has good longitudinal stability should have a minimum tendency to

 - - roll.
 - - pitch.
 - - yaw.

Accepted Answer

pitch

Question 7

As the angle of attack of an airfoil increases, the center of pressure will

 - - move toward the trailing edge.
 - - remain stationary because both lift and drag components increase proportionally to increased angle of attack.
 - -  move toward the leading edge.

Accepted Answer

move toward the leading edge

Question 8

The angle of incidence is that acute angle formed by

 - - the angular difference between the setting of the main airfoil and the auxiliary airfoil (horizontal stabilizer) in reference to the longitudinal axis of the aircraft.
 - - a line parallel to the wing chord and a line parallel to the longitudinal axis of the aircraft.
 - - a line parallel to the wing from root to tip and a line parallel to the lateral axis of the aircraft.

Accepted Answer

a line parallel to the wing chord and a line parallel to the longitudinal axis of the aircraft. - -

Question 9

An airplane's center of lift is usually located aft of its center of gravity

 - - so that the airplane will have a tail-heavy tendency.
 - -  so that the airplane will have a nose-heavy tendency.
 - - to improve stability about the longitudinal axis.
R

Accepted Answer

so that the airplane will have a nose-heavy tendency.

Question 10

An airplane is controlled directionally about its vertical axis by the

 - - rudder.
 - - elevator(s).
 - - ailerons.

Accepted Answer

rudder

Question 11

The elevators of a conventional airplane are used to provide rotation about the

 - - longitudinal axis.
 - -  lateral axis.
 - - vertical axis.

Accepted Answer

lateral axis.

Question 12

Washing- in the left wing of a monoplane, for purposes of rigging corrections after a flight test, will have what effect on the lift and drag of that wing?

 - - Both drag and lift will decrease due to decreased angle of attack.
 - -  Both drag and lift will increase due to increased angle of attack
 - - the drag will decrease due to the effect of the lift increase
R

Accepted Answer

Both drag and lift will increase due to increased angle of attack

Question 13

What type of flap system increases the wing area and changes the wing camber?

 - - Fowler flaps.
 - - Slotted flaps.
 - - Split flaps.

Accepted Answer

Fowler flaps

Question 14

If the right wing of a monoplane is improperly rigged to a greater angle of incidence than designated in the manufacturer's specifications, it will cause the

 - - airplane to be off balance both laterally and directionally.
 - - airplane to pitch and roll about the lateral axis.
 - - right wing to have both an increased lift and a decreased drag.
R

Accepted Answer

airplane to be off balance both laterally and directionally.

Question 15

The chord of a wing is measured from

 - - wingtip to wingtip.
 - - wing root to the wingtip.
 - - leading edge to trailing edge.

Accepted Answer

leading edge to trailing edge.

Question 16

When the lift of an airfoil increases, the drag will

 - - decrease.
 - - also increase.
 - - increase while the lift is changing but will return to its original value.

Accepted Answer

also increase

Question 17

What physical factors are involved in the aspect ratio of airplane wings?

 - - Thickness and chord.
 - -  span and chord.
 - - Dihedral and angle of attack.
R

Accepted Answer

Thickness and chord

Question 18

Improper rigging of the elevator trim tab system will affect the balance of the airplane about its

 - - lateral axis.
 - - longitudinal axis.
 - - vertical axis.
R

Accepted Answer

longitudinal axis

Question 19

An airplane that has a tendency to gradually increase a pitching moment that has been set into motion has

 - - poor longitudinal stability.
 - - good lateral stability.
 - - poor lateral stability.

Accepted Answer

poor longitudinal stability

Question 20

The purpose of wing slats is to

 - - reduce stalling speed
 - - decrease drag
 - - reduce lift.

Accepted Answer

reduce stalling speed

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