USCG Exam PracticeLube oil and fuel oil systems
A vessel's main propulsion diesel shows a sudden drop in lube oil pressure. Which sequence of checks is most consistent with the guidance in the source material?
- ✓ Reduce engine speed, then check oil level, suction strainer, relief valve, pump condition, and inspect for external leaks or internal dilutionCorrect
- B. Immediately increase pump speed to restore pressure, then check for filter bypass activation
- C. Secure the engine, drain the sump, and refill with fresh oil before restarting
- D. Check the lube-oil cooler water supply first, then inspect the full-flow filter for clogging
Why A is correct
NAVEDTRA 14075 §3-3 states that loss of oil pressure is a trip-level emergency and the engineer must investigate at once by checking oil level, the suction strainer, the relief valve, the pump, and for external leaks or internal dilution, and must never run the engine on low oil pressure.
Cited:NAVEDTRA 14075 §3-3