Internal Combustion Engines
In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as

Polymerisation
Supercharging
Scavenging
Detonation

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Internal Combustion Engines
The expansion of fuel in a four stroke cycle diesel engine

Starts at top dead center and ends at 30° after top dead center
Starts at 15° after top dead center and ends at 30° before bottom dead center
May start and end anywhere
Starts at 15° before top dead center and ends at 30° after top dead center

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Internal Combustion Engines
Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?

Exhaust valve closing after top dead center
Inlet valve closing before bottom dead center
Inlet valve closing after bottom dead center
Inlet valve opening before top dead center

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