Internal Combustion Engines
The output of a diesel engine can be increased without increasing the engine revolution or size in following way

Scavenging
Heating incoming air
Supercharging
Feeding more fuel

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Internal Combustion Engines
The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to

Inject fuel at a high velocity to facilitate atomization
All of these
Inject fuel in a chamber of high pressure at the end of compression stroke
Ensure that penetration is not high

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

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