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
Detonation
Auto ignition
Supercharging

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Automobile Engineering in ME
The main function of the tread pattern on tyre is that

In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
The crests between the tread grooves absorb road noise
The tread pattern protects the tyre's inner carcass from small stones and pieces of glass
The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating

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