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

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

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Automobile Engineering in ME
The purpose of a balancer shaft is to

Adjusts the timing of the intake and exhaust valve openings
Reduce vibrations caused by the crankshaft rotation
Increase inertia force of the rotating crankshaft
Balance the timing in the movement of the two groups of pistons

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