Friction Types Quiz
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Questions and Answers

What is the purpose of treaded soles on shoes and tires?

  • To increase friction (correct)
  • To improve aerodynamics
  • To reduce friction
  • To eliminate friction

    • Why do kabaddi players rub their hands with soil?

  • To increase the smoothness of the skin
  • To improve grip by increasing friction (correct)
  • To reduce friction with opponents
  • To eliminate friction completely

    • What effect does adding powder to a carrom board have on friction?

  • Increases friction
  • Decreases friction (correct)
  • Causes no change in friction
  • Eliminates friction

    • Why is it not advisable to use oil as a lubricant in some machines?

    <p>Oil may not be compatible with certain materials</p> Signup and view all the answers

    How does the application of oil, grease, or graphite between moving machine parts reduce friction?

    <p>By forming a thin layer that prevents direct rubbing of surfaces</p> Signup and view all the answers

    Can friction be entirely eliminated by polishing surfaces?

    <p>No, some irregularities will always exist preventing complete elimination of friction</p> Signup and view all the answers

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