Class 4 (4th Engineer) MET 📅 Mar 2024

Exam Question

(a) State FIVE essential electrical services that should be operable under fire conditions. (8)

(c) Explain how electric cables for the essential services in part (a) pass through bulkheads whilst maintaining gas tight and watertight integrity. (4)

Reference Answer

### (a) Essential Electrical Services During Fire Conditions
Under shipboard fire conditions, continuity of power to specific essential services is paramount for damage control, crew safety, and vessel evacuation. As per SOLAS Chapter II-1 and II-2, the following five services must remain operable:
1. **Emergency Fire Pump:** This is the primary active firefighting system. It must be supplied from the emergency switchboard to ensure it can provide firefighting water pressure to the fire main even if the main machinery space, containing main power sources and main fire pumps, is the location of the fire and has been evacuated or suffered a blackout.
2. **Emergency Lighting:** Essential for personnel safety. This includes:

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