Scavenging air in diesel engine means a. air used for combustion under pressure b. forced air for cooling the cylinder c. burnt air containing products of combustion d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke

Scavenging air in diesel engine means  a. air used for combustion under pressure  b. forced air for cooling the cylinder  c. burnt air containing products of combustion  d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke  
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ANSWER  d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke
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