Engine Safety (Supplementary) USCG Question #759 (Set 9)

The cylinders labeled "B" and "C" in the illustration are used to __________. MO-0125

USCG Exam Illustration MO-0125
USCG Examination Diagram: Illustration MO-0125
Official USCG Answer & Rule Citation

Correct Answer: Option D — supply the force required to shift the engine camshafts axially to reverse engine rotation

Pneumatic or hydraulic servo cylinders designated as 'B' and 'C' on direct-reversing propulsion diesels exert the linear actuation force required to slide the camshaft axially, aligning astern cams beneath the followers.

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