Engine Safety (Supplementary) USCG Question #811 (Set 10)

When tightening the lock ring "G" of the device shown in the illustration, two events are simultaneously accomplished. Which of the following statements represents these events? Illustration MO-0112

USCG Exam Illustration MO-0112
USCG Examination Diagram: Illustration MO-0112
Official USCG Answer & Rule Citation

Correct Answer: Option C — When tightened, the lock ring allows for movement of the sliding piston and positions the sliding piston within the bowl bottom.

Tightening the centrifuge lock ring exerts downward axial force on the bowl top, which simultaneously seats against the sliding bowl bottom and establishes proper positioning and sealing of the internal components and disc stack within the purifier bowl assembly.

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