Automobile Engineering in ME
A battery can be charged by

Adding sulphuric acid
Applying voltage in the reverse direction to that of charging
Applying a voltage in the same direction to that of charging
Adding distilled water

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Automobile Engineering in ME
An imbalance wheel during vehicle operation

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

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Automobile Engineering in ME
The basic function of the suspension is to

Ensure that the steering wheel can deliver a suitable amount of steering force
Ensure that wheel alignment is not disturbed during driving
Absorbs vibration and impact forces from the road surface
Automatically correct the effects of over steering

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