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  1. Scavenging air in diesel engine means

    2. A.

     Air used for combustion sent under pressure
    B.

     Forced air for cooling cylinder
    C.

     Burnt air containing products of combustion
    D.

     Air used for forcing burnt gases out of engine's cylinder during the exhaust period

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    Answer : Option D

    Explanation :

    In automotive usage, scavenging is the process of pushing exhausted gas-charge out of the cylinder and drawing in a fresh draught of air or fuel/air mixture for the next cycle. This process is essential in having a smooth-running internal combustion engine.

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