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Class 4 (4th Engineer) MEP 📅 Dec 2022

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,

(c) Increase frequency of filter pack cleaning,

(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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