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130 Cards in this Set
- Front
- Back
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Solid rivets are classified according to what three factors?
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Size, material, and head shape.
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A rivet with the code number MS 20426 has what type of rivet head?
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Countersunk.
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What code identifies a rivet with a plain head marking?
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A (1100-F).
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Rivets used primarily for joining magnesium alloy structures have what alloy designation?
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5056.
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When space is too restricted to properly use a bucking bar, what type of rivet should be used?
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Blind.
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Hi-shear (pin) rivets are available in what two head styles?
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Protruding head, and flush 100-degree countersunk head.
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What fastener has a shear and tensile strength at least equal to the requirements of AN and NAS bolts?
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Lock bolt.
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A 4002 series Camloc fastener consists of what total number of principal parts?
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Four (the receptacle, the grommet, the retaining ring, and the stud assembly).
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What metal is used in the construction of threaded pins of Hi-lok fasteners?
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Cadmium-plated alloy steel.
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Jo-bolts are available in what three head styles?
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100-degree flush head, Hexagon protruding head, and 100-degree millable head.
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How many threads must be extending through the nut of a replacement bolt for it to be considered the correct length?
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Two.
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What type of wrench is used to loosen or tighten countersunk-head and internal-wrenching bolts?
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Allen wrench.
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How many times can a self-locking nut be reused?
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It cannot be reused.
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What type of nut is designed to be used with a cotter pin or safety wire?
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Castle nut.
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What type of nut is used on an assembly that is frequently removed?
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Wing nut.
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What type of nut is used to ensure a permanent and vibration proof connection?
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Klincher locknut.
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What three types of screws are most commonly used in aircraft construction?
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Machine, structural, and self-tapping screws.
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What type of screw is as strong as a bolt of the same size?
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Structural screw.
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Flush-head machine screws are available in what degree(s) of head angle?
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82- and 100-degree only.
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When should a ball socket and seat washer be used on a bolt?
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When bolts are installed at an angle to the surface.
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What type of screw should NOT be used when replacing an original screw in an aircraft structure?
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A self-tapping screw.
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When you install a hose between two duct sections, what is the maximum allowable gap between the duct ends?
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3/4 inch.
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If the correct torque value is not specified on a Marman clamp, what manual should you consult to locate the correct torque value?
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Maintenance Instruction Manual (MIM).
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Where space is limited, what type of fitting is used to connect a cable to a quadrant?
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Ball end.
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A turnbuckle barrel with internal left-hand threads can be identified by what means?
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By a groove or knurl around the end of the barrel.
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What is the total thread tolerance for a turnbuckle assembly?
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7 threads (3 external, 4 internal).
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What type of cable guide should be used for a small opening where a single cable passes through a wall separating unpressurized compartments?
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Grommet.
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What manual should you first consult when replacing an aircraft wire?
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Maintenance Instruction Manual (MIM).
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What type of terminal is generally recommended for use on naval aircraft?
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Solderless crimped-type.
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What device is used on naval aircraft to allow the continuous satisfactory operation of onboard electrical equipment?
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Static discharger.
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What are the two most commonly used types of torque wrenches?
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Dial or beam-indicating type and the setting type.
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What manual provides torquing information for a large variety of nuts, bolts, and screws used in aircraft construction?
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NAVAIR 01-1A-8.
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What is the purpose of a cotter pin?
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A cotter pin is used to secure bolts, nuts, screws, and pins.
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How many different methods are used to secure a turnbuckle?
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Two.
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How many pieces of safety wire are used to secure a turnbuckle using the wire-wrapping method?
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Two.
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What is the Code Letter and Head Marking symbol for an 1100-F rivet?
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Code: A
Head Marking: Plain |
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What is the Code Letter and Head Marking symbol for an 2117-T4 rivet?
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Code: AD
Head Marking: Indented dimple |
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What is the Code Letter and Head Marking symbol for an 2017-T4 rivet?
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Code: D
Head Marking: Raised Teat |
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What is the Code Letter and Head Marking symbol for an 2024-T4 rivet?
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Code: DD
Head Marking: Raised Double Dash |
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What is the Code Letter and Head Marking symbol for an 5056-H32 rivet?
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Code: B
Head Marking: Raised Cross |
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What does the first digit following the alloy number of a rivet represent?
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The diameter of the rivet in thirty-seconds of an inch.
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What does the first digit following the alloy number of a rivet represent?
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The diameter of the rivet in thirty-seconds of an inch.
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In what temper are 1100 rivets supplied?
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Fabricated (F).
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In what temper are 2017,2024, and 2117 rivets supplied?
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Solution heat-treated (T4).
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In what temper are 5056 rivets supplied?
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Strain hardened then stabalized (H32).
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What is by far the most widely used rivet in aviation, especially in repair work? Why?
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2117-T4 (Because it can be used in place of 2017/2024 rivets and does not require heat treatment before driving).
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What must be done to 2017 and 2024 rivets before driving?
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They must be heat treated.
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How long after heat treatment/quenching can 2017 and 2024 rivets be used?
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20 minutes. (If refrigerated below 32 degrees usable life is extended to 24 hours).
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What rivet would be used to join magnesium alloys?
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5056-H32.
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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?
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Hi-Lok fasteners
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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?
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Jo-Bolt fasteners
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What type of specialty fastener is a hollow rivet made of 6063 aluminum alloy, counterbored and threaded on the inside?
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Rivnuts
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What are the three principle parts of a bolt?
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The head, thread, and grip.
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How is proper bolt length verified?
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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.
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How are bolt diameters expressed?
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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.
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What is the difference between a structural screw and a structural bolt?
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Head style only.
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What are the four principle parts of a 4002 series Camloc fastener?
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The receptacle, the grommet, the retaining ring, and the stud
assembly. |
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Dzus fasteners are available in two types: a light-duty type and a heavy-duty type. What is the main difference between the two?
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A grommet, which is only used on the heavy-duty
fasteners. |
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When installing a hose between two duct sections, the gap between the duct ends should be a minimum of ____ and a maximum of ____.
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A minimum of 1/8 of an inch and a maximum of 3/4 of an inch.
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When installing a hose between two duct sections, misalignment between the ducting ends should not exceed what distance?
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Misalignment between the ducting ends should not exceed 1/8 of an inch.
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When installing a clamp on a hose between two duct sections, what minimum distance should the clamp be from the end of the hose?
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1/4 inch.
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What are the safety wire requirements for V-band couplings?
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All V-band couplings shall be double safety-wired.
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Heli-coil inserts are primarily designed for what purpose?
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Heli-coil thread inserts are primarily designed to be used in materials that are not suitable for threading because of their softness.
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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?
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The lay of the cable.
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What is the minimum diameter for primary flight control cables?
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1/8 inch.
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Describe a 7X19 cable.
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Six strands of 19 wires each wrapped around a center strand of 19 wires.
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What are the tolerences when adjusting a turnbuckle?
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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.
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What are the approved methods of safetying turnbuckles?
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The clip-locking (preferred) method and the wire-wrapping
method. |
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What are the two purposes of fairleads?
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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.
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What are the two pruposes of pulleys in aircraft cable systems?
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Pulleys are used to change cable direction and to allow the cable to move with a minimum of friction.
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What is the prupose of sectors and quadrants in aircraft cable systems?
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To transmit the movement of the cable to the rigid members of the system (i.e., bellcranks, pushrods, etc.).
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What is the purpose of static dischargers?
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Static dischargers are used on aircraft to allow the continuous satisfactory operation of onboard navigation and radio communication systems.
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If lighting strikes an aircraft, a good conducting path for heavy current is necessary to minimize severe arcing and sparks. How is this acomplished?
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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.
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What is the formula for computing torque when using a drive-end extension?
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S=T(La)/La(Ea)
S=Handle setting or reading T=desired torque La=handle length Ea=extension length |
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What is the primary cause of fatigue failure of structural hardware?
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Improper torque.
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What publication lists proper torque values for structural hardware?
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NA 01-1A-8.
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What position of a rivet identification code identifies the length of the rivet?
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The second position.
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A 5056 rivet is used to join magnesium alloy materials because of which of the following factors?
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Corrosion resistance.
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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
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Which of the following precautions should you take when using a hi-shear (pin) rivet?
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Never use them where the grip length is less than the shank diameter.
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What type of rivet is used for fastening thick gauge sheets of metal together?
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A shear rivet
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When space on one side is too restricted to properly use a bucking bar, what type of rivet should you use?
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A blind rivet.
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What type of fastener is used in an application where a high strength, interference-free fastener is required?
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A Hi-loc fastener.
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What type of fastener has high strength and is used in applications where access to only one side of the material is available?
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A Jo-bolt.
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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
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What type of rivnut must be used on sealed floatation or pressurized compartments?
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A closed-end rivnut.
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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
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What metal is used in the construction of the threaded pins of Hi-lok fasteners?
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Cadmium-plated alloy steel.
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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
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What type of fasteners are used on panels that are removed and reinstalled frequently for maintenance repairs?
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Turnlock fasteners.
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What distance will the stud of a Camloc fastener have to be turned to release it without permitting re-engagement?
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One-fourth turn counterclockwise.
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Which of the following parts is used only on heavy-duty Dzus fasteners?
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A grommet.
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When you install a hose between two duct sections, what is the maximum allowable gap between the duct ends?
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3/4 inch.
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A V-band coupling requires what minimum number of turns of safety wire?
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Two.
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A flat-head pin used in a tie-rod terminal should be secured with what device?
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A cotter pin.
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A replacement bolt is considered the correct length if at least how many threads are extending through the nut?
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Two threads.
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Aircraft nuts are divided into what two general groups?
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Self-locking and nonself-locking.
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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
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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
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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
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What three types of screws are most commonly used in aircraft construction?
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Machine, structural, and self-tapping screw.
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Which of the following types of screws are as strong as bolts of the same size?
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Structural screws.
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Flush-head screws are available in what degree(s) of head angles?
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82° and 100° only.
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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
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Aircraft cables have the center core twisted in one direction and the outer core in the opposite direction for what reason?
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To minimize the stretch or set.
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A piece of 7 x 19 cable has what total number of wires (and in what arrangement)?
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133 wires (7 strands of 19 wires each).
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Terminal fittings are generally attached to the ends of cables by what method?
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Swaging.
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The measurement of a cable is determined by which of the following factors?
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Diameter.
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The turnbuckle is used to make what type of cable adjustments?
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Minor adjustments to cable length and tension.
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Adjustable connector links are used in what type of cable assemblies?
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Very long cable assemblies.
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A fairlead may be used to minimize cable whipping and minimize vibration in long cable runs and for what other purpose?
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To protect cables when they pass through holes in bulkheads or other metal parts.
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A grommet is manufactured from what material?
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Rubber.
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What device is used on cables or rods that must move through a pressurized bulkhead?
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Pressure seal.
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What device changes cable direction and allows a cable to move with minimum friction?
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Pulley.
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A connector assembly (cannon plug) consists of how many different parts?
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Two (Each connector consists of a plug assembly and a receptacle assembly).
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What device provides a means of fastening a wire to a terminal stud?
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Terminal.
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What type of terminal is generally recommended for use on naval aircraft?
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Crimped-type.
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What type of terminal is usually used in emergencies only?
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Soldered.
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What type of connection is used to connect all metal parts of an aircraft to complete an electrical unit?
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Bonding jumpers.
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What component allows for the continuous satisfactory operation of onboard navigation and radio communication systems?
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Static dischargers.
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What factor accounts for the majority of all fastener problems?
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Fatigue failure.
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Torque values must be followed unless ____.
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The MIM or structural repair manual for the specific aircraft requires a specific torque.
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Cotter pins are used to secure which of the following devices?
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Bolts, nuts, screws, and pins.
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What type of safety wire is used in high-temperature areas?
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Annealed, corrosion-resistant wire.
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What type of safety wire is used on valves and levers used for emergency operation of aircraft equipment?
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Copper wire.
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How many different methods are used for safetying a turnbuckle?
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Two: the clip-locking method (preferred) and the safety-wire method.
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Which method is preferred for safetying a turnbuckle?
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The clip-locking method
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How many times can a turnbarrel lock clip be reused?
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It cannot be reused.
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How many pieces of safety wire are used when securing a turnbuckle using the wire-wrapped method?
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Two.
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When you use the wire-wrapped method on a turnbuckle, each wire is wrapped how many times around the shank?
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Four.
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