Material Hardness Testing Guidelines
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Questions and Answers

What method is used to determine hardness in hardness testing?

  • Impact testing
  • Fatigue strength testing
  • Tensile strength testing
  • Resistance to penetration (correct)

    • Which tester uses a hardened spherical ball for testing?

  • Brinell tester (correct)
  • Impact testing
  • Rockwell tester
  • Tensile strength testing

    • What is the diameter of the ball used in the Brinell hardness tester?

  • 5 millimeters
  • 8 millimeters
  • 15 millimeters
  • 10 millimeters (correct)

    • Which material uses a pressure of 3000 kilograms for the Brinell test?

    <p>Ferrous metals</p> Signup and view all the answers

    What is used to measure the diameter of the impression after a Brinell test?

    <p>Calibrated microscope</p> Signup and view all the answers

    What does the Rockwell tester directly measure on its dial?

    <p>Hardness number</p> Signup and view all the answers

    What do Rockwell hardness numbers indicate about a material?

    <p>Softness or hardness</p> Signup and view all the answers

    'What does a greater difference between major and minor loads in Rockwell testing indicate?

    <p>'Softer material'</p> Signup and view all the answers

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