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      Question

      What is the purpose of a camshaft in a four-stroke

      internal combustion engine used in agricultural tractors?
      A Controls crankshaft speed Correct Answer Incorrect Answer
      B Opens and closes valves at correct timing Correct Answer Incorrect Answer
      C Regulates air-fuel mixture Correct Answer Incorrect Answer
      D Converts linear to rotary motion Correct Answer Incorrect Answer
      E Compresses the air-fuel mixture Correct Answer Incorrect Answer

      Solution

      The camshaft is synchronized with the crankshaft and is responsible for opening and closing the intake and exhaust valves at the right times during the engine cycle. Proper valve timing ensures efficient combustion and engine performance.

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