Hardness in Material Science
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Questions and Answers

What does hardness refer to?

  • The ability of a material to resist abrasion, penetration, cutting action, or permanent distortion (correct)
  • The ability of a material to absorb moisture
  • The ability of a material to change color when exposed to external forces
  • The ability of a material to conduct electricity

What does hardness indicate?

  • The force at which a material permits penetration of another material through its surface (correct)
  • The speed at which the material reacts with other substances
  • The weight of the material
  • The temperature at which the material melts

Which of the following is a characteristic related to hardness?

  • The ability of a material to dissolve in water
  • The ability of a material to emit light when stressed
  • The ability of a material to resist permanent distortion (correct)
  • The ability of a material to change shape temporarily

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