Metal Hardness and Hardenability Quiz
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Questions and Answers

What does hardness in metals refer to?

  • Resistance to penetration by other materials (correct)
  • Ability to be bent without breaking
  • Property to harden uniformly and completely to its center
  • Ease with which metals may be machined

    • How is hardness in metals increased?

  • By treating the metal with heat
  • By bending or hammering at room temperature (correct)
  • By reducing toughness
  • By increasing ductility

    • What property does brittleness in metals refer to?

  • Ability to resist penetration by other materials
  • Ease of machining the metal
  • Ability to be bent without breaking
  • How easily the metal will break with little or no bending (correct)

    • What does tempering do to metals?

    <p>Increases toughness and reduces hardness (B)</p> Signup and view all the answers

    What does fusibility refer to in metals?

    <p>Ability to easily join with another liquid metal (A)</p> Signup and view all the answers

    Which of the following is true about metals high in fusibility?

    <p>They are usually high in weldability (B)</p> Signup and view all the answers

    What characteristic does fatigue represent in metals?

    <p>Causes the metal to fracture under repeated load below tensile strength (A)</p> Signup and view all the answers

    What does elasticity refer to in materials?

    <p>Ability to return to original size and shape after external force is removed (D)</p> Signup and view all the answers

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