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130 Cards in this Set

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  • Back
Solid rivets are classified according to what three factors?
Size, material, and head shape.
A rivet with the code number MS 20426 has what type of rivet head?
Countersunk.
What code identifies a rivet with a plain head marking?
A (1100-F).
Rivets used primarily for joining magnesium alloy structures have what alloy designation?
5056.
When space is too restricted to properly use a bucking bar, what type of rivet should be used?
Blind.
Hi-shear (pin) rivets are available in what two head styles?
Protruding head, and flush 100-degree countersunk head.
What fastener has a shear and tensile strength at least equal to the requirements of AN and NAS bolts?
Lock bolt.
A 4002 series Camloc fastener consists of what total number of principal parts?
Four (the receptacle, the grommet, the retaining ring, and the stud assembly).
What metal is used in the construction of threaded pins of Hi-lok fasteners?
Cadmium-plated alloy steel.
Jo-bolts are available in what three head styles?
100-degree flush head, Hexagon protruding head, and 100-degree millable head.
How many threads must be extending through the nut of a replacement bolt for it to be considered the correct length?
Two.
What type of wrench is used to loosen or tighten countersunk-head and internal-wrenching bolts?
Allen wrench.
How many times can a self-locking nut be reused?
It cannot be reused.
What type of nut is designed to be used with a cotter pin or safety wire?
Castle nut.
What type of nut is used on an assembly that is frequently removed?
Wing nut.
What type of nut is used to ensure a permanent and vibration proof connection?
Klincher locknut.
What three types of screws are most commonly used in aircraft construction?
Machine, structural, and self-tapping screws.
What type of screw is as strong as a bolt of the same size?
Structural screw.
Flush-head machine screws are available in what degree(s) of head angle?
82- and 100-degree only.
When should a ball socket and seat washer be used on a bolt?
When bolts are installed at an angle to the surface.
What type of screw should NOT be used when replacing an original screw in an aircraft structure?
A self-tapping screw.
When you install a hose between two duct sections, what is the maximum allowable gap between the duct ends?
3/4 inch.
If the correct torque value is not specified on a Marman clamp, what manual should you consult to locate the correct torque value?
Maintenance Instruction Manual (MIM).
Where space is limited, what type of fitting is used to connect a cable to a quadrant?
Ball end.
A turnbuckle barrel with internal left-hand threads can be identified by what means?
By a groove or knurl around the end of the barrel.
What is the total thread tolerance for a turnbuckle assembly?
7 threads (3 external, 4 internal).
What type of cable guide should be used for a small opening where a single cable passes through a wall separating unpressurized compartments?
Grommet.
What manual should you first consult when replacing an aircraft wire?
Maintenance Instruction Manual (MIM).
What type of terminal is generally recommended for use on naval aircraft?
Solderless crimped-type.
What device is used on naval aircraft to allow the continuous satisfactory operation of onboard electrical equipment?
Static discharger.
What are the two most commonly used types of torque wrenches?
Dial or beam-indicating type and the setting type.
What manual provides torquing information for a large variety of nuts, bolts, and screws used in aircraft construction?
NAVAIR 01-1A-8.
What is the purpose of a cotter pin?
A cotter pin is used to secure bolts, nuts, screws, and pins.
How many different methods are used to secure a turnbuckle?
Two.
How many pieces of safety wire are used to secure a turnbuckle using the wire-wrapping method?
Two.
What is the Code Letter and Head Marking symbol for an 1100-F rivet?
Code: A
Head Marking: Plain
What is the Code Letter and Head Marking symbol for an 2117-T4 rivet?
Code: AD
Head Marking: Indented dimple
What is the Code Letter and Head Marking symbol for an 2017-T4 rivet?
Code: D
Head Marking: Raised Teat
What is the Code Letter and Head Marking symbol for an 2024-T4 rivet?
Code: DD
Head Marking: Raised Double Dash
What is the Code Letter and Head Marking symbol for an 5056-H32 rivet?
Code: B
Head Marking: Raised Cross
What does the first digit following the alloy number of a rivet represent?
The diameter of the rivet in thirty-seconds of an inch.
What does the first digit following the alloy number of a rivet represent?
The diameter of the rivet in thirty-seconds of an inch.
In what temper are 1100 rivets supplied?
Fabricated (F).
In what temper are 2017,2024, and 2117 rivets supplied?
Solution heat-treated (T4).
In what temper are 5056 rivets supplied?
Strain hardened then stabalized (H32).
What is by far the most widely used rivet in aviation, especially in repair work? Why?
2117-T4 (Because it can be used in place of 2017/2024 rivets and does not require heat treatment before driving).
What must be done to 2017 and 2024 rivets before driving?
They must be heat treated.
How long after heat treatment/quenching can 2017 and 2024 rivets be used?
20 minutes. (If refrigerated below 32 degrees usable life is extended to 24 hours).
What rivet would be used to join magnesium alloys?
5056-H32.
What type of specialty fastener combines the features of a rivet and a bolt and is used for high-strength, interference-free fit of primary structures?
Hi-Lok fasteners
What type of specialty fastener is a high-strength, blind structural fastener that is used on difficult riveting jobs when access to one side of the work is impossible?
Jo-Bolt fasteners
What type of specialty fastener is a hollow rivet made of 6063 aluminum alloy, counterbored and threaded on the inside?
Rivnuts
What are the three principle parts of a bolt?
The head, thread, and grip.
How is proper bolt length verified?
Correct length selection is indicated when the chosen bolt extends through the nut at least two full threads, but no more than two threads extend into the bolt hole.
How are bolt diameters expressed?
If this thickness is 1/4 of an inch or more, the bolt diameter is usually given in fractions of an inch; however, if the bolt is less than 1/4 of an inch thick, the diameter is usually expressed as a whole number.
What is the difference between a structural screw and a structural bolt?
Head style only.
What are the four principle parts of a 4002 series Camloc fastener?
The receptacle, the grommet, the retaining ring, and the stud
assembly.
Dzus fasteners are available in two types: a light-duty type and a heavy-duty type. What is the main difference between the two?
A grommet, which is only used on the heavy-duty
fasteners.
When installing a hose between two duct sections, the gap between the duct ends should be a minimum of ____ and a maximum of ____.
A minimum of 1/8 of an inch and a maximum of 3/4 of an inch.
When installing a hose between two duct sections, misalignment between the ducting ends should not exceed what distance?
Misalignment between the ducting ends should not exceed 1/8 of an inch.
When installing a clamp on a hose between two duct sections, what minimum distance should the clamp be from the end of the hose?
1/4 inch.
What are the safety wire requirements for V-band couplings?
All V-band couplings shall be double safety-wired.
Heli-coil inserts are primarily designed for what purpose?
Heli-coil thread inserts are primarily designed to be used in materials that are not suitable for threading because of their softness.
The relationship of the direction of twist of each strand to each other and to the cable as a whole is known by what term?
The lay of the cable.
What is the minimum diameter for primary flight control cables?
1/8 inch.
Describe a 7X19 cable.
Six strands of 19 wires each wrapped around a center strand of 19 wires.
What are the tolerences when adjusting a turnbuckle?
Turnbuckle terminals must be screwed into the barrel until not more than three threads are exposed, but should not be screwed inside the turnbuckle barrel more than four threads.
What are the approved methods of safetying turnbuckles?
The clip-locking (preferred) method and the wire-wrapping
method.
What are the two purposes of fairleads?
Fairleads are used to protect cables when they pass through holes in bulkheads or other metal parts and to reduce cable whipping and vibration in long runs of cable.
What are the two pruposes of pulleys in aircraft cable systems?
Pulleys are used to change cable direction and to allow the cable to move with a minimum of friction.
What is the prupose of sectors and quadrants in aircraft cable systems?
To transmit the movement of the cable to the rigid members of the system (i.e., bellcranks, pushrods, etc.).
What is the purpose of static dischargers?
Static dischargers are used on aircraft to allow the continuous satisfactory operation of onboard navigation and radio communication systems.
If lighting strikes an aircraft, a good conducting path for heavy current is necessary to minimize severe arcing and sparks. How is this acomplished?
Bonding jumpers provide a necessary low-resistance path, by connecting various metal surfaces in a complete elcetrical circuit, and static dischargers dissipate electrical biuld-up into the air.
What is the formula for computing torque when using a drive-end extension?
S=T(La)/La(Ea)

S=Handle setting or reading
T=desired torque
La=handle length
Ea=extension length
What is the primary cause of fatigue failure of structural hardware?
Improper torque.
What publication lists proper torque values for structural hardware?
NA 01-1A-8.
What position of a rivet identification code identifies the length of the rivet?
The second position.
A 5056 rivet is used to join magnesium alloy materials because of which of the following factors?
Corrosion resistance.
Which of the following is NOT a factor in the classification of solid rivets?
1. Size
2. Color
3. Material
4. Head shape
2. Color
Which of the following precautions should you take when using a hi-shear (pin) rivet?
Never use them where the grip length is less than the shank diameter.
What type of rivet is used for fastening thick gauge sheets of metal together?
A shear rivet
When space on one side is too restricted to properly use a bucking bar, what type of rivet should you use?
A blind rivet.
What type of fastener is used in an application where a high strength, interference-free fastener is required?
A Hi-loc fastener.
What type of fastener has high strength and is used in applications where access to only one side of the material is available?
A Jo-bolt.
Which of the following is a distinguishing characteristic of a rivnut?
1. It is solid
2. It is square
3. It is oblong
4. It is hollow
4. It is hollow
What type of rivnut must be used on sealed floatation or pressurized compartments?
A closed-end rivnut.
Which of the following fasteners has a shear and tensile strength at least equal to the requirements of AN or NAS bolts?
1. Lock bolt
2. Turnlock
3. Rivnut
4. Airloc
1. Lock bolt
What metal is used in the construction of the threaded pins of Hi-lok fasteners?
Cadmium-plated alloy steel.
Which of the following is NOT a head style of a Jo-bolt?
1. 100-degree flush head
2. Diamond recessed head
3. Hexagon protruding head
4. 100-degree flush millable head
2. Diamond recessed head
What type of fasteners are used on panels that are removed and reinstalled frequently for maintenance repairs?
Turnlock fasteners.
What distance will the stud of a Camloc fastener have to be turned to release it without permitting re-engagement?
One-fourth turn counterclockwise.
Which of the following parts is used only on heavy-duty Dzus fasteners?
A grommet.
When you install a hose between two duct sections, what is the maximum allowable gap between the duct ends?
3/4 inch.
A V-band coupling requires what minimum number of turns of safety wire?
Two.
A flat-head pin used in a tie-rod terminal should be secured with what device?
A cotter pin.
A replacement bolt is considered the correct length if at least how many threads are extending through the nut?
Two threads.
Aircraft nuts are divided into what two general groups?
Self-locking and nonself-locking.
Which of the following is an example of an all-metal self-locking nut?
1. A wing nut
2. A flexloc nut
3. An elastic stop nut
4. An internal wrenching nut
2. A flexloc nut
Which of the following types of nuts are designed to be used with cotter pins or safety wire?
1. Check nuts
2. Plate nuts
3. Castle nuts
4. Barrel nuts
3. Castle nuts
When an assembly is frequently removed, which of the following types of nuts should be used?
1. Wing nuts
2. Shear nuts
3. Klincher locknuts
4. Sheet spring nuts
1. Wing nuts
What three types of screws are most commonly used in aircraft construction?
Machine, structural, and self-tapping screw.
Which of the following types of screws are as strong as bolts of the same size?
Structural screws.
Flush-head screws are available in what degree(s) of head angles?
82° and 100° only.
When replacing an original screw in a structure, you should NOT use which of the following screws?
1. A setscrew
2. A machine screw
3. A structural screw
4. A self-tapping screw
4. A self-tapping screw
Aircraft cables have the center core twisted in one direction and the outer core in the opposite direction for what reason?
To minimize the stretch or set.
A piece of 7 x 19 cable has what total number of wires (and in what arrangement)?
133 wires (7 strands of 19 wires each).
Terminal fittings are generally attached to the ends of cables by what method?
Swaging.
The measurement of a cable is determined by which of the following factors?
Diameter.
The turnbuckle is used to make what type of cable adjustments?
Minor adjustments to cable length and tension.
Adjustable connector links are used in what type of cable assemblies?
Very long cable assemblies.
A fairlead may be used to minimize cable whipping and minimize vibration in long cable runs and for what other purpose?
To protect cables when they pass through holes in bulkheads or other metal parts.
A grommet is manufactured from what material?
Rubber.
What device is used on cables or rods that must move through a pressurized bulkhead?
Pressure seal.
What device changes cable direction and allows a cable to move with minimum friction?
Pulley.
A connector assembly (cannon plug) consists of how many different parts?
Two (Each connector consists of a plug assembly and a receptacle assembly).
What device provides a means of fastening a wire to a terminal stud?
Terminal.
What type of terminal is generally recommended for use on naval aircraft?
Crimped-type.
What type of terminal is usually used in emergencies only?
Soldered.
What type of connection is used to connect all metal parts of an aircraft to complete an electrical unit?
Bonding jumpers.
What component allows for the continuous satisfactory operation of onboard navigation and radio communication systems?
Static dischargers.
What factor accounts for the majority of all fastener problems?
Fatigue failure.
Torque values must be followed unless ____.
The MIM or structural repair manual for the specific aircraft requires a specific torque.
Cotter pins are used to secure which of the following devices?
Bolts, nuts, screws, and pins.
What type of safety wire is used in high-temperature areas?
Annealed, corrosion-resistant wire.
What type of safety wire is used on valves and levers used for emergency operation of aircraft equipment?
Copper wire.
How many different methods are used for safetying a turnbuckle?
Two: the clip-locking method (preferred) and the safety-wire method.
Which method is preferred for safetying a turnbuckle?
The clip-locking method
How many times can a turnbarrel lock clip be reused?
It cannot be reused.
How many pieces of safety wire are used when securing a turnbuckle using the wire-wrapped method?
Two.
When you use the wire-wrapped method on a turnbuckle, each wire is wrapped how many times around the shank?
Four.