USCG Exam PracticeLube oil and fuel oil systems
An oiler notices that lube oil pressure on the main propulsion diesel has dropped below the normal operating range. Which sequence of checks is most consistent with the technical guidance for this condition?
- A. Increase engine speed to raise pump output, then check the filter differential pressure
- ✓ Check oil level, inspect the suction strainer, examine the relief valve, check the pump, and look for external leaks or internal dilutionCorrect
- C. Shift to the standby lube oil pump and continue at full power while investigating
- D. Sample the oil for water content and await laboratory results before taking further action
Why B is correct
NAVEDTRA 14075 §3-3 states that upon any fall in oil pressure the engineer investigates 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. Increasing speed or awaiting lab results while continuing operation are not consistent with this guidance.
Cited:NAVEDTRA 14075 §3-3