Safety, Fire & Survival · Fire — Fixed CO2 Operation
Before a fixed CO2 total-flooding system is discharged into a machinery space, what must happen first?
- AThe space is filled with water to the deck plates
- BThe space is evacuated and an audible/visual alarm sounds with a time delay; ventilation and fuel are shut and openings closed✓ Correct
- CAll personnel don lifejackets and muster on the boat deck
- DThe fire main is charged and hoses are run into the space
Explanation
CO2 flooding extinguishes by displacing oxygen, which is lethal to anyone inside. The system has a pre-discharge alarm and time delay to allow escape; boundaries must be closed and ventilation/fuel secured so the gas reaches and holds the design concentration.
Authority: SOLAS II-2; FSS Code; 46 CFR Subpart fire-extinguishing systems
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