Automobile Engineering in ME
The condition that results in large quantities of HC emission is

High atmospheric temperature combustion
High temperature combustion
Incomplete combustion
Low temperature combustion

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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
Increase inertia force of the rotating crankshaft
Adjusts the timing of the intake and exhaust valve openings

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