Motor Plants & Auxiliary Boilers USCG Question #631 (Set 14)

Which of the following statements would apply when checking the valve clearance of the unit shown in the illustration? Illustration MO-0074

USCG Exam Illustration MO-0074
USCG Examination Diagram: Illustration MO-0074
Official USCG Answer & Rule Citation

Correct Answer: Option B — Cold valve clearance is measured between components "C" and "D".

Cold valve clearance must be measured precisely between the valve stem and rocker arm contact points using a feeler gauge while the engine is completely shut down and at ambient temperature to ensure proper thermal expansion allowances.

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