Automobile Engineering in ME
The most accurate ignition system of a spark ignition engine is

Magneto system
Magneto and electronic system
Battery system
Electronic control unit system

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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
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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