Question 1
Which tool is the correct choice for measuring wet cylinder liner protrusion above the engine block deck?
Correct Answer:
Dial indicator with a specialized holding fixture
Question 2
A diesel fitter measures a wet cylinder liner protrusion of 0.02 mm. The manufacturer's specification is 0.08 mm to 0.12 mm, with a target of 0.10 mm. What thickness of shim should be installed under the liner flange to achieve the target protrusion?
Correct Answer:
0.08 mm shim
Question 3
What is the primary cause of wet cylinder liner cavitation erosion on the outer coolant jacket side of a heavy diesel engine?
Correct Answer:
High-frequency liner vibration causing vapor bubbles to collapse against the liner wall
Question 4
A technician calculates the compression ratio of a diesel engine. If the cylinder displacement volume is 1500 cc and the clearance volume is 100 cc, what is the compression ratio?
Correct Answer:
16:1
Question 5
How does a Jacobs engine brake (Jake brake) produce deceleration force in a heavy diesel engine?
Correct Answer:
By opening the exhaust valves near the top of the compression stroke to release compressed air
Question 1
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About this Exam

Prepare with the Cert III Mobile Plant Practice Questions - Certificate III in Mobile Plant Technology (AUR31220) Exam practice quiz. This question bank includes 100 questions covering engine, heavy, diesel, primary, and gear. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Cert III Mobile Plant Practice Questions - Certificate III in Mobile Plant Technology (AUR31220) Exam

This practice set contains 100 questions from the matching question bank and focuses on engine, heavy, diesel, primary, and gear. 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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