Internal Combustion Engines
A hydraulic ram is a device used to

Store the energy of water
To lift small quantity of water to a greater height when a large quantity of water is available at a smaller height
To lift water from deep wells
Increase the pressure of water

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Internal Combustion Engines
The exhaust valve in a four stroke cycle petrol engine

May open and close anywhere
Opens at 50° before bottom dead center and closes at 15° after top dead center
Opens at 50° after bottom dead center and closes at 15° before top dead center
Opens at bottom dead center and closes at top 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 four-stroke petrol engine running at 1500 r.p.m.
30 kW two-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.

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