Internal Combustion Engines
Supercharging is the process of

Providing forced cooling air
Supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
Injecting excess fuel for raising more loads
Supplying compressed air to remove combustion products fully

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Internal Combustion Engines
The tangential velocity of the water element having a free vortex is

Directly proportional to its distance from the centre
Inversely proportional to its (distance)2 from the centre
Inversely proportional to its distance from the centre
Directly proportional to its (distance)2 from the centre

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

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

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