Automobile Engineering in ME
In a square type engine

Two cylinders are placed horizontal and two vertical
Geometrical shape is square
Stroke length and cylinder bore are same
Diameter and length of piston are same

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Automobile Engineering in ME
An imbalance wheel during vehicle operation

Bounces vertically or deflects from side to side (as seen from front or rear)
Deflects in the vehicle's longitudinal direction
Makes large noise when its heavy point hits the road surface
Creates a standing wave

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

The crests between the tread grooves absorb road noise
In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
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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