Question

Scavenging air in a diesel engine means

• A. Air used for combustion is sent under pressure.
• B. Forced air for cooling cylinder.
• C. Burnt air-containing products of combustion.
• D. Air is used for forcing burnt gases out of the engine's cylinder during the exhaust period.

Answer 1

The correct option is D

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

Scavenging:

1. It is a process in diesel engines, in which burst gases are removed from the cylinder after combustion, done by the fresh air coming inside the cylinder.

A diagram to represent the scavenging process:

Diesel engines:

1. It is discovered by Rudolf diesel.
2. It is an internal combustion engine.
3. It is also called a compression-ignition engine.
4. It works by compressing only air.

A diagram to represent the diesel engines:

Hence, option (D) is correct.