Question 24 of 30
The fixed CO2 fire extinguishing system has been activated to extinguish a large engine room bilge fire. When is the best time to vent the combustible products from the engine room?
A
Immediately after the fire goes out
B
After the metal surfaces have cooled down
C
Right before entering the space with an SCBA
D
One hour after initial discharge regardless of temperature
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Answer & Explanation
The correct answer is Option B: After the metal surfaces have cooled down.
After a CO2 discharge, hot surfaces can re-ignite vapours. Venting the compartment after the metal surfaces have cooled down (Option B) reduces the risk of re-ignition and allows hazardous gases to dissipate safely before entry, ideally while wearing SCBA.