Internal Combustion Engines
In a four stroke cycle diesel engine, the compression

Starts at 40° before top dead center and ends at 40° after top dead center
May start and end anywhere
Starts at 40° after bottom dead center and ends at 10° before top dead center
Starts at top dead center and ends at 40° before bottom dead center

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Internal Combustion Engines
Which one of the following engines will have heavier flywheel than the remaining ones?

30 kW two-stroke diesel engine running at 750 r.p.m.
30 kW two-stroke petrol engine running at 1500 r.p.m.
30 kW four-stroke petrol engine running at 1500 r.p.m.
30 kW four-stroke diesel engine running at 750 r.p.m.

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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
Supplying compressed air to remove combustion products fully
Injecting excess fuel for raising more loads

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