ASE T2 Diesel Engines (Medium Heavy Truck) Practice Questions - ASE T2 - Diesel Engines (Medium Heavy Truck) Certification Exam

White smoke from a diesel exhaust during a cold start that clears as the engine warms is MOST likely caused by:

Worn piston rings A plugged diesel particulate filter Unburned fuel due to low combustion temperature An overcharged battery

Correct Answer:

Unburned fuel due to low combustion temperature

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