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Rivet Specifications and Standards Quiz
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Rivet Specifications and Standards Quiz

Created by
@PleasedSugilite7751

Questions and Answers

Which of the following organizations is not mentioned as a source of rivet specifications?

  • MS – Military Standards
  • ISO – International Organization for Standardization (correct)
  • AN – Air Force-Navy
  • NAS – National Aerospace Standard

    • What is the primary function of a rivet in aircraft construction?

  • To obtain clamping action by being mechanically upset (correct)
  • To provide electrical conductivity
  • To fasten non-metal parts
  • To act as a decorative element

    • What denotes the size and head style in a rivet part code?

  • The third part of the code
  • The second part of the code
  • The fourth part of the code
  • The first part of the code (correct)

    • Which type of rivet is stated to generally lack strength compared to protruding-head rivet joints?

    <p>Countersunk rivet</p> Signup and view all the answers

    How is the length of a universal head (AN470) rivet measured?

    <p>From the bottom of the manufactured head to the end of the shank</p> Signup and view all the answers

    What material aspect is addressed by specifications when referring to rivets?

    <p>The alloy material to be used</p> Signup and view all the answers

    Which part of the rivet specification codes indicates the shank diameter?

    <p>Fourth part</p> Signup and view all the answers

    Which type of head design for rivets is characterized as allowing joints that generally lack strength?

    <p>Flush-head rivet</p> Signup and view all the answers

    What characteristic differentiates mechanical-lock rivets from friction-lock rivets?

    <p>Mechanical-lock rivets permanently secure the center stem.</p> Signup and view all the answers

    Which application primarily uses Huck-Lok rivets?

    <p>Structural replacements for solid-shank rivets.</p> Signup and view all the answers

    What is a unique feature of Olympic-Lok blind fasteners?

    <p>They come with a lock ring that slips during installation.</p> Signup and view all the answers

    What is the main advantage of using CherryMAX rivets?

    <p>One size puller can install all sizes of CherryMAX rivets.</p> Signup and view all the answers

    How does a Hi-Shear rivet differ from a standard AN bolt?

    <p>Hi-Shear rivets are secured by a crushed collar.</p> Signup and view all the answers

    What is the purpose of the specially milled groove in a Hi-Shear rivet?

    <p>To aid in the installation of the collar.</p> Signup and view all the answers

    Which of the following describes a Hi-Lok fastener?

    <p>It is compatible with standard AN bolts and nuts.</p> Signup and view all the answers

    What is a primary benefit of using special fasteners compared to standard AN nut-and-bolt assemblies?

    <p>They do not change dimensions during installation.</p> Signup and view all the answers

    What happens to a Hi-Lok after the shear collar is tightened?

    <p>The locking collar remains intact.</p> Signup and view all the answers

    What tool is used to drive a Jo-Bolt into place?

    <p>A specially prepared hand tool or power tool.</p> Signup and view all the answers

    What is the correct procedure for removing special fasteners?

    <p>Tap the remaining fastener out of its hole with a mallet.</p> Signup and view all the answers

    What type of thread characterizes a conventional Hi-Lok?

    <p>Straight shank with standard threads.</p> Signup and view all the answers

    Which rivet is specifically designed to operate effectively at high temperatures?

    <p>CherryMAX.</p> Signup and view all the answers

    What advantage do special fasteners provide in close-tolerance applications?

    <p>They reduce the weight significantly.</p> Signup and view all the answers

    What must be done before a Hi-Shear rivet can be locked into place?

    <p>It has to be tapped into its hole.</p> Signup and view all the answers

    What is the primary purpose of countersinking metal before installing a rivet?

    <p>To allow the rivet head to sit flush with the surface</p> Signup and view all the answers

    Which aluminium alloy rivet is restricted to non-structural assemblies due to its lack of strength?

    <p>1100 Aluminium</p> Signup and view all the answers

    What advantage does 2117-T3 rivet have over other aluminium rivets?

    <p>It boasts high strength and shock-resistance characteristics.</p> Signup and view all the answers

    What do D-rivets require prior to use due to their hardness?

    <p>They must undergo heat treatment.</p> Signup and view all the answers

    Which rivet is specifically used to avoid dissimilar metal corrosion in magnesium aircraft parts?

    <p>5056 Aluminium Alloy</p> Signup and view all the answers

    What is the main distinguishing feature of DD-rivets?

    <p>They have two raised dashes on the head.</p> Signup and view all the answers

    What process can accelerate natural aging of an alloy?

    <p>Precipitation heat-treatment</p> Signup and view all the answers

    What is a key feature of Cherry friction-lock rivets?

    <p>They can be installed with access only from one end.</p> Signup and view all the answers

    Which of the following rivets is often referred to as an icebox rivet?

    <p>2017 Aluminium Alloy</p> Signup and view all the answers

    What is the main use of stainless steel rivets in aviation?

    <p>For joining corrosion-resistant steel sheets.</p> Signup and view all the answers

    What type of marking is found on the head of a 7050-T73 rivet?

    <p>A raised circle</p> Signup and view all the answers

    Which rivet alloy may be used as an alternative to corrosion-resistant steel rivets with lower shear strength?

    <p>Monel</p> Signup and view all the answers

    What issue might arise if a rivet hole is not countersunk or dimpled correctly?

    <p>The gusset may not make direct contact with the rivet head.</p> Signup and view all the answers

    What characterizes the rivets made from pure aluminium?

    <p>They have no identifying marks.</p> Signup and view all the answers

    Study Notes

    Rivet Specifications and Standards

    • Rivet specifications are identified by originating organizations such as Air Force-Navy (AN), National Aerospace Standard (NAS), and Military Standards (MS).
    • MS20470-AD4-4 rivet specifications include material and dimensional requirements, accessible to manufacturers and producers.

    Solid-Shank Rivets

    • Solid-shank rivets are the most common aircraft fasteners used since the inception of sheet metal in aviation.
    • They adapt in size when driven, increasing cross-sectional area, bearing, and shearing strengths.
    • Available in various materials, sizes, and head designs suited for different applications.

    Rivet Codes

    • Rivet part codes provide information on size, head style, alloy material, shank diameter (in 1/32-inch increments), and length (in 1/16-inch increments).
    • Universal heads (AN470) are measured from the manufactured head's bottom, while countersunk heads (AN426) are measured from the head's top.

    Rivet Head Designs

    • Two standard head styles: universal and countersunk (flush).
    • Countersunk rivet joints are typically weaker due to material removal for head accommodation.
    • Proper countersinking or dimpling of metal is essential for adequate rivet installation.

    Rivet Alloys

    • Most aircraft rivets are made from aluminum alloys; type determined by letter in the rivet code.
    • 1100 Aluminium (A): Pure aluminum used for non-structural applications, driven cold.
    • 2117 Aluminium Alloy (AD): Commonly used due to strength, known as 'field rivets'.
    • 5056 Aluminium Alloy (B): Contains magnesium to prevent corrosion on magnesium structures.
    • 2017 Aluminium Alloy (D): Extremely hard and must be heat-treated before use, known as icebox rivets.
    • 2024 Aluminium Alloy (DD): Similar to D-rivets and must be stored cool until used.
    • 7050-T73 Aluminium Alloy (E): High-strength alloy designated by raised circle.
    • Corrosion-Resistant Steel (F): Stainless steel designated with no markings, used for specific applications.
    • Monel (M): Dented head rivets for specific conditions where shear strength is less critical.

    Rivet Heat Treatment

    • Natural aging occurs at room temperature, while precipitation heat treatment accelerates strength development by applying heat.

    Special Rivets and Fasteners

    • Blind Rivets: Installable with access to one end; more expensive than traditional rivets.
    • Friction-Lock Rivets: Cherry friction-locks and their modern variants used primarily for repairs.
    • Mechanical-Lock Rivets: Include Huck-Loks, Olympic-Loks, and CherryMAX rivets, designed to withstand vibrations and ensure structural integrity.

    Hi-Shear Rivets

    • Hi-Shear rivets serve as structural alternatives to standard bolts; installed with an interference fit and secure with a crushed collar.

    Special Fastener Applications

    • Special fasteners like Hi-Loks and Jo-Bolts offer high strength and lightweight options compared to conventional fasteners, allowing for specific applications where traditional fasteners may not fit.

    Removal of Special Fasteners

    • Removal procedures include unscrewing locking components, tapping out with a mallet, or drilling pilot holes for flush-type Jo-Bolts before extraction.

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    Description

    Test your knowledge on rivet specifications and standards including solid-shank rivets, rivet codes, and head designs used in aviation. Dive into the details of various specifications identified by organizations like NAS and MS. This quiz will enhance your understanding of fastening in aircraft manufacturing.

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