Question 1
A medium-duty diesel engine has low power but no diagnostic trouble codes. Which check should the technician perform FIRST?
Correct Answer:
Verify a restricted air filter or exhaust by reading intake restriction and exhaust backpressure
Question 2
Technician A says blue exhaust smoke usually indicates oil consumption. Technician B says black exhaust smoke usually indicates incomplete combustion or excess fuel. Who is correct?
Correct Answer:
Both A and B
Question 3
White smoke from a diesel exhaust during a cold start that clears as the engine warms is MOST likely caused by:
Correct Answer:
Unburned fuel due to low combustion temperature
Question 4
During a cylinder cutout (kill) test on an electronically controlled diesel, the engine RPM does NOT drop when one cylinder is disabled. This indicates that cylinder is:
Correct Answer:
Contributing little or no power
Question 5
A diesel engine is hard to start when cold but starts normally when warm. Glow systems are not used on this engine. Which is the MOST likely cause?
Correct Answer:
Air in the fuel system or low cranking compression
Question 1
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About this Exam

Prepare with the ASE T2 Diesel Engines (Medium Heavy Truck) Practice Questions - ASE T2 - Diesel Engines (Medium Heavy Truck) Certification Exam practice quiz. This question bank includes 100 questions covering diesel, engine, cause, technician, and says. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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

This practice set contains 100 questions from the matching question bank and focuses on diesel, engine, cause, technician, and says. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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