Class 4 (4th Engineer) MEP 📅 Apr 2024

Exam Question

During your watch you observe that Main Engine L.O. sump level is rising due to contamination of lubricating oil. Describe the procedure to:

(a) Identify the contamination (6)

(b) Locate the cause of contamination (6)

Reference Answer

### (a) Procedure to Identify the Contamination (6 Marks)
A rising level in the Main Engine Lubricating Oil sump indicates contamination by a liquid, typically water or fuel. The following systematic procedure should be followed to identify the contaminant:
1. **Initial Onboard Sensory Checks:**
* **Visual Inspection:** Draw a sample from the sump sampling cock. A milky, hazy, or emulsified appearance indicates water contamination. A dark, thin appearance might suggest fuel dilution.

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