Q3.
Express your reactions and state the subsequent investigation you would make if a laboratory report on a used diesel engine lubricating oil sample indicated the presence of appreciable
amounts of:
A. Iron; B. Copper, C. Antimony and Tin; D. Silicon; E. n-pentane and toluene insoluble
(16)
Reference Answer
### Introduction: Interpreting a Used Lubricating Oil Analysis Report A used lubricating oil (LO) analysis report is a critical diagnostic tool for condition-based maintenance of a marine diesel engine. It provides a snapshot of the health of both the oil and the machinery components it lubricates. As a Chief Engineer, receiving a report with appreciable amounts of contaminants requires immediate, systematic, and logical investigation. My reaction would be one of serious concern, as these indicators often precede catastrophic failures. The subsequent investigation must be aimed at identifying the root cause and implementing corrective actions to prevent damage. --- ### A. Appreciable Amounts of Iron (Fe)
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