Your ship has a low-pressure carbon dioxide...

Question 1 / 205eccef9ebacbc34ba4d463cc

Question 1 of 205eccef9ebacbc34ba4d463cc

Your ship has a low-pressure carbon dioxide system that covers the engine room. Fire has been reported in the engine room and the decision has been made to dump the carbon dioxide system into the engine room. While following the procedures to release carbon dioxide you find one engine room supply fan damper that will not close. How should you proceed?

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🔍 Key Concepts

• Fixed CO₂ fire extinguishing systems requirements for tightness and boundary integrity • Effect of ventilation and openings on CO₂ concentration in a machinery space fire • SOLAS/USCG guidance that CO₂ systems must be able to achieve and maintain a minimum extinguishing concentration

💭 Think About

• What happens to the effectiveness of CO₂ if there is a significant opening that allows continued air flow and gas escape? • Which options involve actions that are approved, fire‑safe methods versus improvised or potentially hazardous methods near a fire? • Is it better to delay discharge briefly to ensure a tight space, or discharge immediately with a known leak path?

✅ Before You Answer

• Verify that all ventilation, dampers, and openings should be secured before CO₂ discharge to contain the gas • Consider whether plastic or similar combustible materials are acceptable for covering openings in a fire situation • Think about which option best preserves the designed concentration of CO₂ in the engine room for a sufficient period of time

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Question 1 of 20

Continue the release procedures and dump the carbon dioxide, after the release then try to seal the fan damper opening.

Cover the fan damper opening with a plastic tarp to stop the flow of air into the engine room and then continue with the release procedures.

Continue the release procedures and dump the carbon dioxide with the damper still open.

Cover the fan damper opening with burlap bags to slow the flow of air into the engine room and then continue with the release procedures.

Question 1 / 205eccef9ebacbc34ba4d463cc

Question 1 of 205eccef9ebacbc34ba4d463cc

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Question 1 of 20

5eccef9ebacbc34ba4d463cc

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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