🔍 Key Concepts

• Properties of CO2 as a smothering agent (how it actually puts out fire) • Difference between smothering and cooling in firefighting • Behavior of CO2 in high heat and its use with/without ship’s power

💭 Think About

• Think about how CO2 stops a fire: does it mainly remove oxygen, cool the fuel, or both? Which of the options best matches that characteristic? • Consider what happens to hot metal, bulkheads, or cargo right after a CO2 discharge. Would any of these choices explain why a fire might re‑ignite? • Look at each option and ask: is this a widely known, general limitation of CO2 systems on ships, or something that sounds unlikely or too specific?

✅ Before You Answer

• Verify which option correctly describes CO2’s primary firefighting action (smothering vs cooling). • Check which statement reflects a real, commonly taught limitation of CO2 systems in marine firefighting manuals. • Eliminate any option that conflicts with basic fire science: how CO2 behaves under heat and whether it needs electrical power to be released from fixed systems.