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

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

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Automobile Engineering in ME
The purpose of a cylinder head gasket is to

Prevent engine oil from going into combustion chamber
Removes impurities from cylinder head lubricating oil
Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
None of these

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