Automobile Engineering in ME
The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as

Scavenging
Supercharging
Auto ignition
Detonation

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Automobile Engineering in ME
The function of positive crankcase ventilation (PCV) system is that it

Mixes fuel with air
Returns blow by gases from the crankcase to the intake system
Promotes combustion by creating a swirling movement in the air-fuel mixture
Feeds blow by gases to the exhaust manifold

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Automobile Engineering in ME
It is necessary to maintain the valve clearances as they

Make the crankshaft turn smoothly
Increase the speed at which the valves move up and down
Reduce the resistance to sliding that occurs between the cam and the tappet
Allow for lengthening of the valves owing to the heat of combustion

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