Internal Combustion Engines
In a typical medium speed, 4-stroke cycle diesel engine

May start and end anywhere
Fuel injection starts at top dead center and ends at 20° after top dead center
Fuel injection starts at 10° before top dead center and ends at 20° after top dead center
Fuel injection starts at just before top dead center and ends just after top dead center

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Internal Combustion Engines
In a four stroke cycle petrol engine, the inlet valve

May open or close anywhere
Opens at 20° before top dead center and closes at 40° after bottom dead center
Opens at top dead center and closes at bottom dead center
Opens at 20° after top dead center and closes at 20° 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 petrol engine running at 1500 r.p.m.
30 kW two-stroke diesel engine running at 750 r.p.m.
30 kW four-stroke diesel engine running at 750 r.p.m.
30 kW four-stroke petrol engine running at 1500 r.p.m.

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