Assembly & Rigging

Question 1

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

Answer 1

Cyclic pitch control

Question 2

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

Answer 2

Worn attachment fittings

Question 3

If the control stick of an aircraft with properly rigged flight controls is moved forward and to the right, the left aileron will move

Answer 3

Down and the elevator will move down.

Question 4

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

Answer 4

Retain a set tension

Question 5

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

Answer 5

Pulley misalignment

Question 6

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

Answer 6

Through the center of gravity at all times.

Question 7

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

Answer 7

Pitch

Question 8

Aircraft flight control trim systems must be designed and installed so that the

Answer 8

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

Question 9

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

Answer 9

Relative position of the blades during rotation.

Question 10

The vertical flight of a helicopter is controlled by

Answer 10

Collective pitch changes

Question 11

Which statement is correct concerning torque effect on helicopters?

Answer 11

Torque direction is the opposite of rotor blade rotation.

Question 12

Where is the buttock line or buttline of an aircraft?

Answer 12

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

Question 13

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

Answer 13

Rejected

Question 14

If the control stick of an aircraft with properly rigged flight controls is moved rearward and to the left, the right aileron will move

Answer 14

Down and the elevator will move up

Question 15

if the vertical fin of a single-engine, propeller-driven airplane is rigged properly, it will generally be parallel to

Answer 15

The vertical axis but not the longitudinal axis

Question 16

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

Answer 16

Cotter pin

Question 17

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

Answer 17

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

Question 18

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

Answer 18

Lateral axis

Question 19

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

Answer 19

Track

Question 20

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

Answer 20

Lateral axis

Question 21

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?

Answer 21

Aircraft type certificate data sheet

Question 22

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

Answer 22

Corrosion resisting steel

Question 23

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

Answer 23

3

Question 24

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

Answer 24

Nose into the wind

Question 25

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

Answer 25

Decrease when the aircraft structure and cables become cold.

Question 26

The angle of incidence is that acute angle formed by

Answer 26

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

Question 27

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

Answer 27

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

Question 28

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?

Answer 28

The airplane will be heavy on the controls.

Question 29

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

Answer 29

Bubble level and special fixtures described by the manufacturer.

Question 30

Where is fuselage station No.137 located?

Answer 30

137 inches aft of the zero or fixed reference line.

Question 31

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

Answer 31

So that air currents do not destabilize the scales.

Question 32

Fairleads should never deflect the alignment of a cable more than

Answer 32

3 degrees.

Question 33

The universal propeller protractor can be used to measure

Answer 33

Degrees of flap travel

Question 34

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?

Answer 34

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

Question 35

If a pilot reports that an airplane flies left wing heavy, this condition may be corrected by

Answer 35

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

Question 36

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

Answer 36

Move toward the leading edge.

Question 37

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

Answer 37

117 pounds minimum, 143 pounds maximum

Question 38

Differential control on an aircraft system means that

Answer 38

The up travel is more than the down travel

Question 39

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?

Answer 39

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

Question 40

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

Answer 40

Torque and directional control

Question 41

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

Answer 41

Lateral stability

Question 42

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

Answer 42

Aircraft service or maintenance manual

Question 43

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

Answer 43

Tilting the main rotor disk in the desired direction

Question 44

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

Answer 44

An unsteady flow from turbulence

Question 45

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

Answer 45

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

Question 46

Which should be accomplished before jacking an aircraft?

Answer 46

Install critical stress panels or plates

Question 47

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

Answer 47

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

Question 48

The chord of a wing is measured from

Answer 48

Leading edge to trailing edge

Question 49

How are changes in direction of a control cable accomplished?

Answer 49

Pulleys

Question 50

Movement about the lateral axis (pitch) in a helicopter is effected by the movement of the

Answer 50

Cyclic pitch control

Question 51

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

Answer 51

angle of attack

Question 52

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

Answer 52

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

Question 53

The purpose of the vertical fin is to provide

Answer 53

Directional stability

Question 54

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

Answer 54

1/8 inch

Question 55

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

Answer 55

Fowler flaps

Question 56

The purpose of wing slats is to

Answer 56

Reducing stalling speed

Question 57

An airplane's center of lift is usually located aft of its center of gravity

Answer 57

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

Question 58

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

Answer 58

Broken strands

Question 59

The angle of incidence of an airplane at rest

Answer 59

Does not change when in flight

Question 60

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

Answer 60

Poor longitudinal stability

Question 61

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?

Answer 61

Upward regardless of elevator position

Question 62

When installing a castle nut, start alignment with the cotter pin hole at the

Answer 62

Minimum recommended torque plus friction drag torque

Question 63

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

Answer 63

Front spar

Question 64

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

Answer 64

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

Question 65

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

Answer 65

To manufacturer's specification

Question 66

Movement of an airplane along it's lateral axis (roll) is also movement

Answer 66

Around or about the longitudinal axis controlled by ailerons.

Question 67

A reduction in anti-torque thrust will cause the

Answer 67

Tail to pivot in the direction of torque rotation around the main rotor axis.

Question 68

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

Answer 68

With the aileron in the NEUTRAL position

Question 69

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

Answer 69

Varying the pitch of the tail rotor blades

Question 70

If the right wing of a monoplane is improperly rigged to a greater angle of incidence when designated in the manufacturer's specifications, it will cause the

Answer 70

Airplane to be off balance both laterally and directionally.

Question 71

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

Answer 71

Less than the retreating blade

Question 72

An airplane is controlled directionally about its vertical axis by the

Answer 72

Rudder

Question 73

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

Answer 73

longitudinal axis

Question 74

The correct dihedral angle can be determined by

Answer 74

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

Question 75

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

Answer 75

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

Question 76

The primary purpose of stall strips is to

Answer 76

Stall the inboard portion of the wings first.

Question 77

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

Answer 77

The full rated strength of the cable.

Question 78

With which system is differential control associated?

Answer 78

Aileron

Question 79

When the lift of an airfoil increases, the drag will

Answer 79

Also increase

Question 80

The purpose of spring tabs or servo tabs is to

Answer 80

Assist the pilot in moving the control surfaces.

Question 81

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

Answer 81

Span and chord

Question 82

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

Answer 82

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