Automobile Engineering in ME
An imbalance wheel during vehicle operation

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

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Automobile Engineering in ME
The main function of a master cylinder is to

Ensure that all the wheel brakes are supplied with the same amount of fluid pressure
Convert brake pedal force into hydraulic pressure
Adjust the extent of brake pedal free play
Boost the force applied to brake pedal

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Automobile Engineering in ME
The auto ignition in a spark ignition engine means

Ignition of the charge before the passage of flame front
Ignition induced to supplement the process of normal combustion
Automatic ignition of the charge at the end of compression
Ignition induced by the passage of a spark

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