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

Low temperature combustion
High temperature combustion
Insufficient air during combustion
Insufficient fuel during combustion

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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
Bounces vertically or deflects from side to side (as seen from front or rear)
Deflects in the vehicle's longitudinal direction
Creates a standing wave

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