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Assembly and Rigging > Assembly and Rigging > Flashcards

Assembly and Rigging Flashcards

1
Q
  1. The auxiliary (tail) rotor of a helicopter permits the pilot to compensate for and/or accomplish what?
A
  1. Torque and directional control.
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2
Q
  1. The vertical flight of a helicopter is controlled by?
A
  1. Collective pitch changes.
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3
Q
  1. A reduction in anti-torque thrust will cause the…
A
  1. Tail to pivot in the direction of torque rotation around the main rotor axis.
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4
Q
  1. In rotorcraft external-loading, the ideal location of the cargo release is where the line of action passes…
A
  1. through the center of gravity at all times.
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5
Q
  1. The acute angle formed by the chord line of a wing and the relative wind is known as the?
A
  1. Angle of attack
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6
Q
  1. A helicopter in forward flight, cruise configuration, changes direction by?
A
  1. Tilting the main rotor disk in the desired direction
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7
Q
  1. The purpose in checking main rotor blade tracking is to determine the…
A
  1. relative position of the blades during rotation.
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8
Q
  1. In a hovering helicopter equipped with a tail rotor, directional control is maintained by?
A
  1. Varying the pitch of the tail rotor blades.
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9
Q
  1. If a single-rotor helicopter is in forward horizontal flight, the angle of attack of the advancing blade is?
A
  1. Less than the retreating blade.
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10
Q
  1. Main rotor blades that do not cone by the same amount during rotation are said to be out of
A
  1. Track
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11
Q
  1. One purpose of the freewheeling unit is required between the engine and the helicopter transmission is to?
A
  1. Automatically disengage the rotor from the engine in case of an engine failure.
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12
Q
  1. Which statement is correct concerning torque effect on helicopters?
A

Torque direction is the opposite of rotor blade rotation.

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13
Q
  1. What is purpose of the free-wheeling unit in a helicopter drive system?
A

It disengages the engine from the main rotor when engine RPM is less than rotor RPM.

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14
Q
  1. Movement about the lateral axis (roll) in a helicopter is also movement of the
A

cyclic pitch control.

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15
Q
  1. Movement about the longitudinal axis (roll) in a helicopter is effected by movement of the
A

cyclic pitch control.

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16
Q
  1. Wing dihedral, a rigging consideration on most airplanes of conventional design, contributes most to stability of the airplane about its
A

longitudinal axis

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17
Q
  1. 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?
A

Aircraft Type Certificate Data Sheet

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18
Q
  1. If a pilot reports that an airplane flies left wing heavy, this condition may be corrected by?
A

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

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19
Q
  1. If the vertical fin of a single-engine, propeller-driven airplane is rigged properly, it will generally be parallel to…
A

The vertical axis but not the longitudinal axis

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20
Q
  1. An airplane which has good longitudinal stability should have a minimum tendency to…
A

Pitch

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21
Q
  1. As the angle of attack of an airfoil increases, the center of pressure will…
A

Move toward the leading edge.

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22
Q
  1. The angle of incidence is that acute angle formed by?
A

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

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23
Q
  1. An airplane’s center of lift is usually located aft of its center of gravity…
A

so that the airplane will have a nose-heavy tendency

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24
Q
  1. An airplane is controlled directionally about its vertical axis by the?
A

rudder

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25
Q
  1. The elevators of a conventional airplane are used to provide rotation about the?
A

lateral axis

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26
Q
  1. Washing-in the left wing of the monoplane, for purposes of rigging corrections after flight test, will have what effect on the lift and drag of that wing?
A

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

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27
Q
  1. What type of flap system increases the wing area and changes the wing camber?
A

Fowler flaps.

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28
Q
  1. If the wing of a monoplane is improperly rigged to a greater angle of incidence that designated in the manufacturer’s specifications, it will cause the….
A

airplane to be off balance both laterally and directionally

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29
Q
  1. The chord of a wing is measured from…
A

leading edge to trailing edge

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30
Q
  1. When the lift of an airfoil increases, the drag will…
A

also increase.

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31
Q
  1. What physical factors are involved in the aspect ratio of airplane wings?
A

Span and chord

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32
Q
  1. Improper rigging of the elevator trim tab system will affect the balance of the airplane about its
A

lateral axis

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33
Q
  1. An airplane that has a tendency to gradually increase a pitching moment that has been set into motion has…
A

poor longitudinal stability

34
Q
  1. The purpose of wing slats is to?
A

reduce stalling speed

35
Q
  1. The angle of incidence of an airplane at rest…
A

does not change when in flight

36
Q
  1. Buffeting is the intermittent application of forces to a part of an airplane. It is caused by..
A

an unsteady flow from turbulence.

37
Q
  1. Movement of an airplane along its lateral axis (roll) is also movement…
A

around or about the longitudinal axis controlled by the ailerons.

38
Q
  1. The primary purpose of stall strips is to?
A

stall the inboard portion of the wings first.

39
Q
  1. Rigging and alignment checks should not be undertaken in the open. However, if this cannot be avoided, the aircraft should be positioned with the…
A

nose into the wind.

40
Q
  1. The correct dihedral angle can be determined by
A

using a dihedral board and bubble level along the front spar of each wing.

41
Q
  1. The dihedral angle of a wing may be measured by placing a straightedge and level protractor on the…
A

front spar

42
Q
  1. Where would you find precise information to perform a symmetry alignment check for particular aircraft?
A

Aircraft service or maintenance manual.

43
Q
  1. Where is the buttock line or butt-line of an aircraft?
A

A width measurement left or right of, and parallel to, the vertical centerline.

44
Q
  1. Where is fuselage station No. 137 located?
A

137 inches aft of the zero or fixed reference line.

45
Q
  1. Proper wing twist in a sheet metal constructed wing can usually be checked utilizing a?
A

bubble level and special fixtures described by the manufacturer

46
Q
  1. The vast majority of aircraft control cables are terminated with swaged terminals, that must be
A

checked with a go-no-go gauge before and after, to show compliance with the manufacturer’s requirements after the swaging operation.

47
Q
  1. What nondestructive checking method is normally used to ensure that the correct amount of swaging has taken place when installing swaged-type terminals on aircraft control cable?
A

Use a terminal gauge to check the diameter of the swaged portion of the terminal

48
Q
  1. When inspecting a control cable turnbuckle for proper installation, determine that…
A

the safety wire ends are wrapped a minimum of four turns around the terminal end shanks.

49
Q
  1. If all instructions issued by the swaging tool manufacturer are followed when swaging a cable terminal, the resultant swaged terminal strength should be?
A

the full rated strength of the cable.

50
Q
  1. Which is an acceptable safety device for a castle nut when installed on secondary structures?
A

Cotter pin

51
Q
  1. When installing a castle nut, start alignment with the cotter pin hole at the…
A

minimum recommended torque plus friction drag torque

52
Q
  1. When used in close proximity to magnetic compass, cotter pins are made of what material?
A

Corrosion resisting steel

53
Q
  1. When a fire or nylon insert-type self-locking nut can be threaded on a bolt or stud through the insert with only the fingers, it should be…
A

rejected

54
Q
  1. The purpose of a vertical fin is to provide…
A

directional stability

55
Q
  1. How are changes in direction of a control cable accomplished?
A

Pulleys

56
Q
  1. What is the smallest size cable that may be used in aircraft primary control systems?
A

1/8 inch.

57
Q
  1. After repairing or re-covering a rudder, the surface should be rebalanced…
A

to manufacturer’s specifications.

58
Q
  1. Placing a piece of cloth around a stainless steel control cable and running it back and forth over the length of the cable is generally a satisfactory method of inspecting for?
A

broken strands.

59
Q
  1. The cable-operated control system of an all-metal aircraft, not incorporating a temperature compensating device, has been rigged to the correct tension in a heated hangar. If the aircraft operated in very cold weather, the cable tension will…
A

decrease when the aircraft structure and cables become cold.

60
Q
  1. Very often, repairs to a control surface require static rebalancing of the control surface. Generally, flight control balance condition may be determined by…
A

the behavior of the trailing edge when the surface is suspended from its hinge points.

61
Q
  1. Excessive wear on both of the sides of a control cable pulley groove is evidence of?
A

pulley misalignment

62
Q
  1. Fairleads should never deflect the alignment of a cable more than…
A

3 degrees

63
Q
  1. Where does the breakage of control cable wires occur most frequently?
A

Breaking usually occurs where cables pass over pulleys and through fairleads.

64
Q
  1. With which system is differential control associated?
A

Aileron

65
Q
  1. What concerning the 100-hour inspection of an airplane equipped with a push-pull tube-type control system is true?
A

The threaded rod ends should be checked for the amount of thread engagement by means of the inspection whole provided.

66
Q
  1. If control cables are adjusted properly and the control surfaces tend to vibrate, the probable cause is…
A

worn attachment fittings.

67
Q
  1. Aircraft flight control trim systems must be designed and installed so that the…
A

pilot can determine the relative position of the trim tab from the cockpit.

68
Q
  1. Stability about the axis which runs parallel to the line of flight is referred to as?
A

lateral stability

69
Q
  1. The purpose of spring tabs of servo tabs is to…
A

assist the pilot in moving the control surfaces.

70
Q
  1. If the control sticks of an aircraft with properly rigged flight controls is moved rearward and to the left, the right aileron will move…
A

down and the elevator will move up.

71
Q
  1. Movement of the cockpit control toward the nose-down position during a ground operational check of the elevator trim tab system will cause the trailing edge of the trim tab to move in which direction?
A

Upward regardless of elevator position.

72
Q
  1. If the control stick of an aircraft with properly rigged flight controls is moved forward and to the right, the left aileron will move…
A

down and the elevator will move down

73
Q
  1. If the travel of an airplane’s controls is correct but the cables are rigged exceptionally tight, what probable effect will this have when flying the airplane?
A

The airplane will be heavy on the controls

74
Q
  1. During inspection of the flight control system of an airplane equipped with differential-type aileron control, side-to-side movement of the control stick will cause?
A

each aileron to have a greater up travel (from the streamlined position) than down travel

75
Q
  1. A universal propeller protractor used to measure the degrees of aileron travel should be zeroed…
A

with the aileron in the NEUTRAL position

76
Q
  1. The universal propeller protractor can be used to measure?
A

degrees of flap travel

77
Q
  1. A tension regulator in the flight control cable system of a large all-metal aircraft is used primarily to?
A

retain a set tension

78
Q
  1. Differential control on an aileron system means that…
A

the up travel is more than the down travel.

79
Q
  1. Why is it generally necessary to jack an aircraft indoors for weighing?
A

So that air currents do not destabilize the scales.

80
Q
  1. Which should be accomplished before jacking an aircraft?
A

Install critical stress panels or plates

Assembly and Rigging (1 decks)

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