Class 4 (4th Engineer) MEP 📅 Dec 2022

Exam Question

The exhaust temperatures of an auxiliary diesel 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)

Reference Answer

### (a) Investigation of the Situation (5 Marks)
A systematic investigation must be conducted to ascertain the root cause of the observed symptoms: excessive and uneven exhaust temperatures, accompanied by dark exhaust smoke. The approach should be logical, progressing from external checks to internal component verification.
1. **Initial Data Collection & Symptom Analysis:**
* Immediately record all relevant engine parameters at the current load: individual exhaust temperatures, scavenge air pressure, turbocharger RPM, engine load (kW), individual fuel rack positions, LT cooling water temperatures, and ambient conditions.

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