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Class 4 (4th Engineer) MEP 📅 Dec 2024

Exam Question

The exhaust temperatures of an auxiliary diesel engine are found to be excessive and uneven at normal load, with dark exhaust at the funnel. Describe EACH of the following:

(a) An investigation of the situation; (5)

(b) The procedure to remedy the immediate problems; (6)

(c) Any further action that might be necessary. (5)

Reference Answer

### (a) Investigation of the Situation (5 Marks)
A systematic investigation is crucial to accurately diagnose the root cause of high/uneven exhaust temperatures and dark smoke. The process involves data collection, analysis, and sequential checks.
**1. Initial Data Collection & Observation:**
* Record all cylinder exhaust temperatures, turbocharger RPM, scavenge air pressure and temperature, and exhaust gas temperatures before and after the turbine.

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