🔍 Key Concepts
• Fire classes and fuel types (what burns in class A, B, C, D, E)
• How CO₂ works as an extinguishing agent (oxygen displacement, no cooling, non‑conductive gas)
• When water is dangerous (especially around liquids and electrical equipment)
đź’ Think About
• Which fire classes involve ordinary combustibles, flammable liquids, electrical equipment, metals, etc.? Match these to where a gas that displaces oxygen (CO₂) would be effective.
• In which situations is it important that the extinguishing agent is non-conductive and leaves no residue?
• For each option, ask yourself: Is CO₂ generally recommended, acceptable with limitations, or specifically not recommended for that fire class?
âś… Before You Answer
• Be clear on what Class A, B, C, D, and E each represent in standard marine/firefighting terminology.
• Ask: Does CO₂ provide enough cooling for that class, or does it mainly just remove oxygen? Where is that acceptable or unsafe?
• Check which classes typically require special agents (like dry powder or foam) instead of CO₂ as the primary choice.