With a machinery lubricating oil analysis program, it is important to monitor trends over time. What would be indicated by elevated copper levels associated with a recent sample of used diesel engine crankcase lubricating oil?
Official USCG Answer & Rule Citation
Correct Answer: Option C — Wear of various lead-bronze alloy bearings.
Under USCG National Maritime Center examination standards, the accepted correct answer is: Wear of various lead-bronze alloy bearings..
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