Airframe Part 3

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

The vertical flight of a helicopter is controlled by

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

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

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

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

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

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

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

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

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

Which statement is correct concerning torque effect on helicopters?

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

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

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

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

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?

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

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

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

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

The angle of incidence is that acute angle formed by

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

An airplane is controlled directionally about its vertical axis by the

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

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?

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

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

The chord of a wing is measured from

When the lift of an airfoil increases, the drag will

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

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

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

The purpose of wing slats is to

The angle of incidence of an airplane at rest

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

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

The primary purpose of stall strips is to

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

The correct dihedral angle can be determined by

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

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

Where is the buttock line or buttline of an aircraft?

Where is fuselage station No. 137 located?

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

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

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?

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

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

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

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

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

The purpose of the vertical fin is to provide

How are changes in direction of a control cable accomplished?

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

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

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

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

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

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

Fairleads should never deflect the alignment of a cable more than

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

With which system is differential control associated?

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

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

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

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

The purpose of spring tabs or servo tabs is to

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

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?

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

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?

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

The universal propeller protractor can be used to measure

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

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

Differential control on an aileron system means that

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

Which should be accomplished before jacking an aircraft?

In Gas Tungsten Arc (GTA) welding, a stream of inert gas is used to

Which statement best describes magnesium welding?

Which statement is true in regard to welding heat-treated magnesium?

The oxyacetylene flame for silver soldering should be

Why is it necessary to use flux in all silver soldering operations?

Engine mount members should preferably be repaired by using a

What method of repair is recommended for a steel tube longeron dented at a cluster?

Welding over brazed or soldered joints is

Which statement concerning soldering is correct?

A resurfaced soldering iron cannot be used effectively until after the working face has been

Which of the following can normally be welded without adversely affecting strength?
2. SAE 4130 chrome/molybdenum tubing.

In selecting a torch tip size to use in welding, the size of the tip opening determines the

Why should a carburizing flame be avoided when welding steel?

The most important consideration(s) when selecting welding rod is

The oxyacetylene flame used for aluminum welding should

A very thin and pointed tip on a soldering copper is undesirable because it will

Filing or grinding a weld bead

Acetylene at a line pressure above 15 PSI is

Cylinders used to transport and store acetylene

A welding torch backfire may be caused by

Which statement concerning a welding process is true?

Where should the flux be applied when oxyacetylene welding aluminum?

What purpose does flux serve in welding aluminum?

Why are aluminum plates 1/4 inch or more thick usually preheated before welding?

How should a welding torch flame be adjusted to weld stainless steel?

Oxides form very rapidly when alloys or metals are hot. It is important, therefore, when welding aluminum to use a

In gas welding, the amount of heat applied to the material being welded is controlled by the

Oxygen and acetylene cylinders are made of

When a butt welded joint is visually inspected for penetration,

Annealing of aluminum

Edge notching is generally recommended in butt welding above a certain thickness of aluminum because it

If too much acetylene is used in the welding of stainless steel,

The shielding gases generally used in the Gas Tungsten Arc (GTA) welding of aluminum consist of