Class 4 (4th Engineer) MEKG 📅 Dec 2023

Exam Question

(a) Whils't on 'seawatch' you observe that the Oil Mist detector (OMD) in the engine room has triggered an alarm and in feeling the crankcase doors on the bottom platform, you find that the unit in question feels warmer than the rest. What pre-emptive action will you take as Watch-keeper to bring the situation under control. (10)

(b) Draw a simple line diagram of a 'OMD' and explain it's working. (6)

Reference Answer

### Part (a): Pre-emptive Action for OMD Alarm (10 Marks)
Upon observing an Oil Mist Detector (OMD) alarm and confirming a warmer crankcase door for a specific unit, the Watchkeeping Engineer must execute a series of systematic and pre-emptive actions prioritizing the safety of personnel, the vessel, and the machinery. The primary objective is to prevent a crankcase explosion.
**1. Immediate Actions & Communication:**
* **Acknowledge Alarm:** Immediately acknowledge the audible and visual OMD alarm on the Engine Control Room (ECR) panel.

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