🔍 Key Concepts

• Class B (flammable liquid) fires and how oil cargo behaves when burning • How water, CO₂, and foam each act on a burning liquid surface • Why a ruptured cargo tank from an explosion or collision may be open to the atmosphere

💭 Think About

• Ask yourself which agent can both smother the surface of the burning oil and prevent reignition by separating fuel from air. • Consider which agent might actually spread burning oil instead of putting it out in a ruptured tank situation. • Think about which agents work best only in a closed, confined space versus those designed for large, open-surface liquid fires.

✅ Before You Answer

• Verify which extinguishing agent is specifically recommended for large flammable liquid pool fires on tankers. • Check whether water is suitable as a primary agent on a floating oil fire in a damaged tank. • Confirm which agents can form a stable blanket on top of the fuel to control vapors and prevent flashback.