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Class 2 (2nd Engineer) MEP 📅 Mar 2025

Exam Question

With reference to fixed CO2 system for fighting machinery space fires: (16)

(a) Sketch a CO2 bottled system

(b) How the number of CO2 bottles required for ship is calculated

(c) Explain how the system sketched in part (a) is protected from overpressure

(d) Describe the periodic maintenance required

Reference Answer

(a) The CO2 flooding system floods the protected space under fire with carbon dioxide, which displaces air, thereby removing one leg of fire triangle for the extinction of fire. CO2 flooding system consist of main CO2 bottles, common manifold, master valve or distribution valve and distribution pipe lines with nozzles as shown in the figure below. Click on the diagram to enlarge.
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