Internal Combustion Engines
A hydraulic ram is a device used to

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

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

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Internal Combustion Engines
Pour point of fuel oil is the

It catches fire without external aid
Temperature at which it solidifies or congeals
Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
Indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off

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Internal Combustion Engines
The delay period in compression ignition engines depends upon

All of these
Nature of the fuel mixture strength
Relative velocity between the fuel injection and air turbulence pressure of residual gases
Temperature and pressure in the cylinder at the time of injection

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