Engine Safety (Supplementary) USCG Q#345 (Set 5)

The main lube oil manifold, for the diesel engine shown in the illustration, is represented by the letter or number __________. Illustration MO-0122

USCG Exam Illustration MO-0122 — USCG Examination Diagram: **Illustration MO-0122**

Official USCG Answer & Rule Citation

Correct Answer: Option A — "O"

Letter 'O' designates the primary longitudinal main lubricating oil gallery, which distributes pressurized oil from the engine pump to main bearings, camshafts, and cooling circuits.

All Engine Safety (Supplementary) Sets Practice Set 5