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
May start and end anywhere
Starts at 15° before 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

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Internal Combustion Engines
Which of the following statement is correct regarding petrol engines?

The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug
A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure
The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition
All of these

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

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

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Internal Combustion Engines
In a typical medium speed 4-stroke cycle diesel engine the inlet valve

May open or close anywhere
Opens at top dead center and closes at bottom dead center
Opens at 10° after top dead center and closes 20° before the bottom dead center
Opens at 20° before top dead center and closes at 35° after the bottom dead center

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