🔍 Key Concepts
• Class B fires involve flammable liquids such as fuel oil, gasoline, and grease
• Different fire-extinguishing agents are designed for specific fire classes (A, B, C, D, K)
• Some agents can be used on multiple fire classes, others are limited to one or two
💭 Think About
• For each agent (dry chemical, foam, CO2), ask: Is this normally rated and approved for use on flammable liquid fires?
• Think about what happens if you spray water on burning oil; which of these agents behave differently than water on fuel?
• On vessels, which agents are commonly found in machinery spaces or near fuel sources, where flammable liquid fires are likely?
✅ Before You Answer
• Verify which extinguishers are typically labeled "Class B" or "B:C" in standard training material
• Make sure you understand the primary extinguishing action of each agent (smothering, cooling, interrupting chemical reaction)
• Before choosing "All of the above," check that each individual agent can in fact be used on Class B fires, not just one or two of them