| Question | Answer |
| 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. | angle of attack |
| 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. | lateral axis |
| 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. | Aircraft type certificate data sheet. |
| 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. | increasing the angle of incidence of the left wing or decreasing the angle of incidence of the right wing, or both. |
| 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. | the vertical axis but not the longitudinal axis. |
| An airplane which has good longitudinal stability should have a minimum tendency to
- - roll.
- - pitch.
- - yaw. | pitch |
| 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. | move toward the leading edge |
| 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. | a line parallel to the wing chord and a line parallel to the longitudinal axis of the aircraft. - - |
| 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 | so that the airplane will have a nose-heavy tendency. |
| An airplane is controlled directionally about its vertical axis by the
- - rudder.
- - elevator(s).
- - ailerons. | rudder |
| The elevators of a conventional airplane are used to provide rotation about the
- - longitudinal axis.
- - lateral axis.
- - vertical axis. | lateral axis. |
| 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 | Both drag and lift will increase due to increased angle of attack |
| What type of flap system increases the wing area and changes the wing camber?
- - Fowler flaps.
- - Slotted flaps.
- - Split flaps. | Fowler flaps |
| 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 | airplane to be off balance both laterally and directionally. |
| The chord of a wing is measured from
- - wingtip to wingtip.
- - wing root to the wingtip.
- - leading edge to trailing edge. | leading edge to trailing edge. |
| 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. | also increase |
| What physical factors are involved in the aspect ratio of airplane wings?
- - Thickness and chord.
- - span and chord.
- - Dihedral and angle of attack.
R | Thickness and chord |
| Improper rigging of the elevator trim tab system will affect the balance of the airplane about its
- - lateral axis.
- - longitudinal axis.
- - vertical axis.
R | longitudinal axis |
| 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. | poor longitudinal stability |
| The purpose of wing slats is to
- - reduce stalling speed
- - decrease drag
- - reduce lift. | reduce stalling speed |
