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      Question

      What is the purpose of piston rings in an

      engine?
      A Increase friction Correct Answer Incorrect Answer
      B Prevent gas leakage Correct Answer Incorrect Answer
      C Absorb engine noise Correct Answer Incorrect Answer
      D Reduce engine weight Correct Answer Incorrect Answer
      E Increase compression ratio Correct Answer Incorrect Answer

      Solution

      Piston rings prevent gas leakage, reduce friction, and control oil distribution within the cylinder.

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