🔍 Key Concepts
• Classes of fire (A, B, C, D, K) and which materials belong to each
• How different extinguishing agents work: cooling vs. smothering vs. interrupting chemical reaction
• Which extinguishing agents are recommended for ordinary combustibles like wood, paper, and cloth
💭 Think About
• First, decide what class of fire a wood fire is considered. That narrows which extinguishing agents are preferred.
• Think about which agent removes heat most effectively versus which remove oxygen or interrupt the chemical reaction.
• Ask yourself: On a ship, if wood, paper, or cloth are burning, what type of extinguisher or system is usually specified as primary?
✅ Before You Answer
• Confirm which fire class covers wood, paper, cloth, and similar materials.
• Match each choice (dry chemical, water, carbon dioxide, dry powder) to the fire classes it is best suited for.
• Eliminate any agents that are mainly intended for flammable liquids, electrical fires, or metal fires, not ordinary combustibles.