Motor Plants & Auxiliary Boilers USCG Question #1385 (Set 27)

What is the function of component "13" shown in the illustration? Illustration MO-0122

USCG Exam Illustration MO-0122
USCG Examination Diagram: Illustration MO-0122
Official USCG Answer & Rule Citation

Correct Answer: Option B — The device delivers the oil for piston cooling, in addition to liner lubrication.

Component '13' delivers targeted lubricating and cooling oil directly to the underside of the piston crown and internal skirt, simultaneously providing supplementary lubrication for the surrounding cylinder liner walls.

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