Class 4 (4th Engineer) MEP 📅 Sep 2025

Exam Question

The exhaust temperature of an auxiliary diesel engine is found to be excessive and uneven at normal load with dark exhaust at the funnel.

Describe the following:

(a) an investigation into the situation; (5)

(b) the procedure to remedy the immediate problems, an identified; (6)

Reference Answer

### (a) Investigation into the Situation (5 Marks)
A systematic investigation is crucial to accurately diagnose the root cause of excessive, uneven exhaust temperatures and dark smoke. The approach combines data analysis with logical, sequential checks of the engine's air and fuel systems.
**1. Initial Data Collection & Observation:**
* **Confirm Load Condition:** Verify on the main switchboard that the engine is operating at a normal and steady load (kW, Amps). Note any hunting or fluctuations.

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