Class 4 (4th Engineer) MEP 📅 Jan 2025

Exam Question

Oil traces have been found in the condensate tank of an auxiliary boiler

(a) Describe the procedure to trace the source of contamination. (8)

(b) List the contamination with reasons for its occurrence and the precaution to be taken to ensure safety of the boiler. (8)

Reference Answer

### (a) Procedure to Trace the Source of Contamination
Identifying the source of oil contamination in an auxiliary boiler's condensate tank is critical to prevent severe boiler damage. A systematic and thorough procedure must be followed:
1. **Initial Assessment and Immediate Actions:**
* **Confirm Contamination:** Visually inspect the condensate tank/hotwell for oil film or sheen. Note any unusual smell. Confirm by taking a sample and checking for oil globules or emulsified oil. If severe, observe the boiler water level gauge for signs of foaming.

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