Assembly and Rigging

Question 1

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

Answer 1

Torque and directional control

Question 2

The vertical flight of a helicopter is controlled by

Answer 2

Collective pitch changes

Question 3

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

Answer 3

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

Question 4

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

Answer 4

Through the center of gravity at all times

Question 5

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

Answer 5

Angle of attack

Question 6

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

Answer 6

Tilting the main rotordisk to the desired direction

Question 7

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

Answer 7

Relative position of the blades during rotation

Question 8

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

Answer 8

Varying the pitch of the tail rotor blade

Question 9

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

Answer 9

Less than the retreating blade

Question 10

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

Answer 10

Track

Question 11

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

Answer 11

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

Question 12

Which statement is correct concerning torque effect on helicopters?

Answer 12

Torque direction is the opposite of the rotor blade rotation

Question 13

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

Answer 13

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

Question 14

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

Answer 14

Cyclic pitch control

Question 15

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

Answer 15

Longitudinal axis

Question 16

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 16

Aircraft type certificate date sheet

Question 17

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

Answer 17

The vertical axis but not the longitudinal axis

Question 18

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

Answer 18

Pitch

Question 19

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

Answer 19

Move toward the leading edge

Question 20

The angle of incidence is that acute angle formed by

Answer 20

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

Question 21

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

Answer 21

So that the airplane will have a nose heavy tendency

Question 22

An airplane is controlled directionally about its vertical axis by the

Answer 22

Rudder

Question 23

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

Answer 23

Lateral axis

Question 24

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 24

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

Question 25

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

Answer 25

Fowler flaps

Question 26

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

Answer 26

Airplane to be off balance both laterally and directionally

Question 27

The chord of a wing is measured from

Answer 27

Leading edge to trailing edge

Question 28

When the lift of an airfoil increases, the drag will

Answer 28

Also increase

Question 29

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

Answer 29

Span and chord

Question 30

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

Answer 30

Lateral axis

Question 31

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

Answer 31

Poor longitudinal stability

Question 32

The purpose of wing slats is to

Answer 32

Reduce stalling speed

Question 33

The angle of incidence of an airplane at rest

Answer 33

Does not change when in flight

Question 34

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

Answer 34

An unsteady flow from turbulence

Question 35

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

Answer 35

Around or about the longitudinal axis controlled by the ailerons

Question 36

The primary purpose of stall strips is to

Answer 36

Provide added lift at high angles of attack

Question 37

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

Answer 37

With the nose into the wind

Question 38

The correct dihedral angle can be determined by

Answer 38

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

Question 39

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

Answer 39

Front spar

Question 40

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

Answer 40

aircraft service or maintenance manual

Question 41

Where is the buttock line or buttline of an aircraft?

Answer 41

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

Question 42

Where is fuselage station No. 137 located?

Answer 42

137 inches aft of the zero or fixed reference line

Question 43

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

Answer 43

Bubble level and special fixtures described by the manufacturer

Question 44

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

Answer 44

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

Question 45

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 45

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

Question 46

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

Answer 46

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

Question 47

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

Answer 47

A full rated strength of the cable

Question 48

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

Answer 48

Cotter pin

Question 49

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

Answer 49

Corrosion resistant steel

Question 50

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 50

Rejected

Question 51

The purpose of the vertical fin is to provide

Answer 51

Directional stability

Question 52

How are changes in direction of a control cable accomplished?

Answer 52

Pulleys

Question 53

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

Answer 53

1/8 inch

Question 54

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

Answer 54

To manufacturer specification

Question 55

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

Answer 55

Inspecting for broken wires

Question 56

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 56

Decrease when the aircraft structure and cables become cold

Question 57

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

Answer 57

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

Question 58

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

Answer 58

Pulley misalignment

Question 59

Fairleads should never deflect the alignment of a cable more than

Answer 59

3 degrees

Question 60

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

Answer 60

Breakage usually occurs where cables pass over pulleys and through fairleads

Question 61

With which system is differential control associated?

Answer 61

Ailerons

Question 62

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

Answer 62

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

Question 63

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

Answer 63

Worn attachment fittings

Question 64

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

Answer 64

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

Question 65

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

Answer 65

Lateral stability

Question 66

The purpose of spring tabs or servo tabs is to

Answer 66

Assist the pilot in moving the control surfaces

Question 67

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 67

Down and the elevator will move up

Question 68

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?

Answer 68

Upward regardless of the elevator position

Question 69

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 69

Down and elevator will move down

Question 70

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 70

The airplane will be heavy on controls

Question 71

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 71

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

Question 72

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

Answer 72

With the aileron in the neutral position

Question 73

The universal propeller protractor can be used to measure

Answer 73

Degrees of flap travel

Question 74

(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 74

3

Question 75

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

Answer 75

Retain a set tension

Question 76

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

Answer 76

117 pounds minimum, 143 pounds maximum

Question 77

Differential control on an aileron system means that

Answer 77

The up travel is more than the down travel

Question 78

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

Answer 78

So that air currents do not stabilize the scale

Question 79

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

Answer 79

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