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      Question

      How is thermal efficiency different in diesel and petrol

      engines?
      A Diesel engines have lower efficiency Correct Answer Incorrect Answer
      B Petrol engines have higher efficiency Correct Answer Incorrect Answer
      C Diesel engines have higher efficiency Correct Answer Incorrect Answer
      D Both have the same efficiency Correct Answer Incorrect Answer
      E Efficiency depends only on engine size Correct Answer Incorrect Answer

      Solution

      Diesel engines typically have higher thermal efficiency (32-38%) compared to petrol engines (25-32%).

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