Internal Combustion Engines
Which of the following is false statement?

Oil sludge in the engine crank case
Piston ring and cylinder wear
Formation of hard coating on piston skirts
Detonation

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Internal Combustion Engines
A hydraulic ram is a device used to

Store the energy of water
Increase the pressure 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

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Internal Combustion Engines
Scavenging air in diesel engine means

Burnt air containing products of combustion
Air used for combustion sent under pressure
Forced air for cooling cylinder
Air used for forcing burnt gases out of engine's cylinder during the exhaust period

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