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
Store the energy of water
Increase the pressure of water
To lift water from deep wells

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Internal Combustion Engines
The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the

Flow is produced due to the static head in the float chamber
The diameter of the jet is constant and the discharge coefficient is invariant
Jet area is automatically varied depending on the suction
The flow from the main jet is diverted to the compensating jet with increase in speed

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