Class 4 (4th Engineer) SSEP 📅 Feb 2025

Exam Question

Considering that the engine room is the most common single space on board ships for fire to break out, discuss the merits and demerits of the following fixed fire fighting systems: (20)

(a) Carbon dioxide

(b) Pressure water spray

Reference Answer

The engine room, being a space with high concentrations of flammable liquids, hot surfaces, and electrical equipment, poses a significant fire risk. Consequently, robust fixed fire fighting systems are mandatory. Each system possesses distinct merits and demerits, making their selection and design critical for effective fire protection and personnel safety.
### (a) Carbon Dioxide (CO2) Fixed Fire Fighting System
**Concept:** A total flooding system designed to rapidly introduce a sufficient concentration of CO2 into an enclosed space to reduce the oxygen level below the point required to sustain combustion, typically around 15% to 12% by volume.
**Merits (Advantages):**

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