🔍 Key Concepts
• Know what materials are involved in Class A, B, C, and D fires
• Understand what a stored-pressure water extinguisher contains and how it works
• Match the extinguishing agent (water) to the type of fuel involved
💭 Think About
• For each fire class, ask: would water help remove heat, or could it spread or worsen this fire?
• Think about which class involves ordinary combustibles versus flammable liquids, electrical equipment, or metals
• Which type of fire is it generally considered safe to apply plain water to on board a vessel?
✅ Before You Answer
• Verify which fire class includes wood, paper, cloth, and trash
• Verify which fire classes involve flammable liquids, energized electrical equipment, or combustible metals—and whether water should be avoided on them
• Confirm that a stored-pressure water extinguisher contains only water and air, not foam, CO₂, or dry chemical