🔍 Key Concepts
• Class A fires (ordinary combustibles like wood, paper, cloth) and how they are normally fought aboard ship
• The basic fire-extinguishing principles: cooling, smothering, removing fuel, and interrupting the chemical chain reaction
• The typical agent used in water extinguishers and why they are labeled for Class A
đź’ Think About
• Ask yourself: For burning wood, paper, or cloth, what is the most effective way to make sure the material does NOT re‑ignite once the flames are knocked down?
• Think about which extinguishing principle (cooling, smothering, removing fuel, chain-reaction interruption) is primarily associated with Class A fires, especially when using water.
• Compare each option and decide which one matches how a standard water extinguisher actually works on a Class A fire.
âś… Before You Answer
• Verify which extinguishing method is specifically recommended for Class A fires in basic marine firefighting references or training materials.
• Check how water works as a firefighting agent: does it mainly remove oxygen, form a foam blanket, or significantly lower the fuel temperature?
• Confirm that the choice you select would both knock down visible flames AND reduce the chance of re‑ignition in porous, glowing materials like wood or paper.