Class 4 (4th Engineer) MEKG 📅 Nov 2023

Exam Question

(a) Using a line diagram, show the arrangement of 'emergency bilge suction' for a general cargo ship. (8)

(b) State the purpose of 'bilge injection' valve and to which pump or pumps it is connected? Give reasons. (4)

(c) State requirements with respect to the diameter of bilge injection valve and main sea suction valve on sea chest. (4)

Reference Answer

### (a) Arrangement of Emergency Bilge Suction
The emergency bilge suction, also known as bilge injection, is a mandatory SOLAS fitting designed for the rapid dewatering of the machinery space in the event of major flooding. It utilizes a high-capacity pump, typically the main seawater circulating pump, to discharge large quantities of water directly overboard.
The arrangement, as shown in the requested line diagram, consists of the following key components and layout:
* **Main Sea Chest:** This is the primary intake for seawater for the engine room cooling systems. It is fitted with strainers (grids) to prevent the ingress of large debris.

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