Automobile Engineering in ME
An imbalance wheel during vehicle operation

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

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Automobile Engineering in ME
The function of an oil control orifice is that it

Turns oil into fine mist for spray lubrication
Removes impurities from cylinder head lubricating oil
Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
Returns cylinder head lubricating oil to the oil pan at high speed

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