Class 4 (4th Engineer) MEP 📅 Oct 2023

Exam Question

State with reasons which one of the following would most help to correct a pronounced discoloration of the M/E lubricating oil: (16)

(a) "Make up" from reserve tanks

(b) Increase purifier throughput

(d) Overhaul piston rod stuffing boxes

(e) Check tank top integrity of sump tank

Reference Answer

### Analysis of Options for Correcting Lubricating Oil Discoloration
The most effective action to correct a pronounced discoloration of the Main Engine lubricating oil is **(d) Overhaul piston rod stuffing boxes**. Discoloration is a symptom of contamination, and a full-marks answer requires identifying and rectifying the root cause, not merely treating the symptom.
Here is a detailed analysis of each option:
#### (d) Overhaul piston rod stuffing boxes (Correct Answer)

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