🔍 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.