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      Question

      Thermal efficiency of diesel engine varies between

      A 25% to 30% Correct Answer Incorrect Answer
      B 32% to 38% Correct Answer Incorrect Answer
      C 60% to 70% Correct Answer Incorrect Answer
      D 70% to 75% Correct Answer Incorrect Answer

      Solution

      A diesel engine can convert 32% to 38% of the energy in the fuel into useful mechanical work, while the remaining energy is lost as waste heat.

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