Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Aircraft Engineering > Assembly and Rigging > Flashcards

Assembly and Rigging Flashcards

1
Q

The auxiliary (tail) rotor of a helicopter permits the pilot to compensate for and/or accomplish which of
the following?

A

Torque and directional control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The vertical flight of a helicopter is controlled by

A

Collective pitch changes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A decrease in pitch angle of the tail rotor blades on a helicopter

A

Causes the tail to pivot in the direction of torque rotation around the main rotor axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In rotorcraft external-loading, the ideal location of the cargo release is where the line of action passes

A

Through the center of gravity at all times

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The acute angle formed by the chord line of a wing and the relative wind is known as the

A

Angle of attack

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

A helicopter in forward flight, cruise configuration, changes direction by

A

Tilting the main rotordisk to the desired direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The purpose in checking main rotor blade tracking is to determine the

A

Relative position of the blades during rotation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

In a hovering helicopter equipped with a tail rotor, directional control is maintained by

A

Varying the pitch of the tail rotor blade

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

If a single-rotor helicopter is in forward horizontal flight, the angle of attack of the advancing blade is

A

Less than the retreating blade

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Main rotor blades that do not cone by the same amount during rotation are said to be out of

A

Track

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

One purpose of the freewheeling unit required between the engine and the helicopter transmission is to

A

Automatically disengage the rotor from the engine in case of an engine failure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which statement is correct concerning torque effect on helicopters?

A

Torque direction is the opposite of the rotor blade rotation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the purpose of the free-wheeling unit in a helicopter drive system?

A

It disconnects the rotor whenever the engine stops or slows below the equivalent of rotor rpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Movement about the longitudinal axis (roll) in a helicopter is effected by movement of the

A

Cyclic pitch control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Wing dihedral, a rigging consideration on most airplanes of conventional design, contributes most to
stability of the airplane about its

A

Longitudinal axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

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 date sheet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

An airplane which has good longitudinal stability should have a minimum tendency to

A

Pitch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

As the angle of attack of an airfoil increases, the center of pressure will

A

Move toward the leading edge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

An airplane is controlled directionally about its vertical axis by the

A

Rudder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

The elevators of a conventional airplane are used to provide rotation about the

A

Lateral axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Washing-in the left wing of a 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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What type of flap system increases the wing area and changes the wing camber?

A

Fowler flaps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

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

A

Airplane to be off balance both laterally and directionally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

The chord of a wing is measured from

A

Leading edge to trailing edge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

When the lift of an airfoil increases, the drag will

A

Also increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What physical factors are involved in the aspect ratio of airplane wings?

A

Span and chord

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Improper rigging of the elevator trim tab system will affect the balance of the airplane about its

A

Lateral axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

An airplane that has a tendency to gradually increase a pitching moment that has been set into motion
has

A

Poor longitudinal stability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

The purpose of wing slats is to

A

Reduce stalling speed

33
Q

The angle of incidence of an airplane at rest

A

Does not change when in flight

34
Q

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

A

An unsteady flow from turbulence

35
Q

Movement of an airplane along its lateral axis (roll) is also movement

A

Around or about the longitudinal axis controlled by the ailerons

36
Q

The primary purpose of stall strips is to

A

Provide added lift at high angles of attack

37
Q

Rigging and alignment checks should not be undertaken in the open; however, if this cannot be avoided,
the aircraft should be positioned

A

With the nose into the wind

38
Q

The correct dihedral angle can be determined by

A

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

39
Q

The dihedral angle of a wing may be measured by placing a straightedge and level protractor on the

A

Front spar

40
Q

Where would you find precise information to perform a symmetry alignment check for a particular
aircraft?

A

aircraft service or maintenance manual

41
Q

Where is the buttock line or buttline of an aircraft?

A

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

42
Q

Where is fuselage station No. 137 located?

A

137 inches aft of the zero or fixed reference line

43
Q

Proper wing twist in a sheet metal constructed wing can usually be checked by utilizing a

A

Bubble level and special fixtures described by the manufacturer

44
Q

The vast majority of aircraft control cables are terminated with swaged terminals, that must be

A

Check with a go no go gauge before and after, to show compliance with the manufacturers
requirements after the swaging operation

45
Q

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

46
Q

When inspecting a control cable turnbuckle for proper installation, determine that

A

The safety wire wrapped a minimum of four turns around the terminal end shanks

47
Q

If all instructions issued by the swaging tool manufacturer are followed when swaging a cable terminal,
the resultant swaged terminal strength should be

A

A full rated strength of the cable

48
Q

Which is an acceptable safety device for a castle nut when installed on secondary structures?

A

Cotter pin

49
Q

When used in close proximity to magnetic compasses, cotter pins are made of what material?

A

Corrosion resistant steel

50
Q

When a fiber 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

51
Q

The purpose of the vertical fin is to provide

A

Directional stability

52
Q

How are changes in direction of a control cable accomplished?

A

Pulleys

53
Q

What is the smallest size cable that may be used in aircraft primary control systems?

A

1/8 inch

54
Q

After repairing or re-covering a rudder, the surface should be rebalanced

A

To manufacturer specification

55
Q

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

A

Inspecting for broken wires

56
Q

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 is
operated in very cold weather, the cable tension will

A

Decrease when the aircraft structure and cables become cold

57
Q

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 form its hinge points

58
Q

Excessive wear on both of the sides of a control cable pulley groove is evidence of

A

Pulley misalignment

59
Q

Fairleads should never deflect the alignment of a cable more than

A

3 degrees

60
Q

Where does the breakage of control cable wires occur most frequently?

A

Breakage usually occurs where cables pass over pulleys and through fairleads

61
Q

With which system is differential control associated?

A

Ailerons

62
Q

Which statement concerning the 100-hour inspection of an airplane equipped with a push-pull tube- type control system is true?

A

The threaded rod ends of the turnbuckles should be checked for the amount of thread engagement
by means of the hole provided

63
Q

If control cables are adjusted properly and the control surfaces tend to vibrate, the probable cause is

A

Worn attachment fittings

64
Q

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

65
Q

Stability about the axis which runs parallel to the line of flight is referred to as

A

Lateral stability

66
Q

The purpose of spring tabs or servo tabs is to

A

Assist the pilot in moving the control surfaces

67
Q

If the control stick 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

68
Q

Movement of the cockpit control toward the nosedown 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 the elevator position

69
Q

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 elevator will move down

70
Q

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 controls

71
Q

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

72
Q

A universal propeller protractor used to measure the degrees of aileron travel should be zeroed

A

With the aileron in the neutral position

73
Q

The universal propeller protractor can be used to measure

A

Degrees of flap travel

74
Q

(Refer to Figure 8.) Identify the cable that is used in primary control systems and in other places where
operation over pulleys is frequent.

A

3

75
Q

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

A

Retain a set tension

76
Q

(Refer to Figure 9.) When the outside air temperature is 80°F, select the acceptable 3/16 cable tension
range.

A

117 pounds minimum, 143 pounds maximum

77
Q

Differential control on an aileron system means that

A

The up travel is more than the down travel

78
Q

Why is it generally necessary to jack an aircraft indoors for weighing?

A

So that air currents do not stabilize the scale

79
Q

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 wing, or decreasing the angle of incidence of the right ,
or both

Aircraft Engineering (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions