AFF Exit Exam • Set 4 Question 26 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?

✓

Direct Answer

Option C: 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.

All Options

A

Right before entering the space with an SCBA

B

One hour after initial discharge regardless of temperature

C

After the metal surfaces have cooled down (Correct Answer)

D

Immediately after the fire goes out

Detailed Explanation & Context

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.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Fire Fighting (AFF).

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