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  1. In a diesel engine the high temperature needed to ignite the fuel is achieved by

  2. A.

     Using heat from exhaust

    B.

     The battery

    C.

     Compressing air in the cylinders

    D.

     An electrical spark

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    Answer : Option C

    Explanation :

    The diesel engine gains its energy by burning fuel injected or sprayed into the compressed, hot air charge within the cylinder. The air must be heated to a temperature greater than the temperature at which the injected fuel can ignite.


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