🔍 Key Concepts

• Class B fires (flammable liquids like oil and gasoline) and how different agents affect the surface of the liquid • Difference between high-velocity fog, low-velocity fog, dry chemical, and steam smothering in terms of impact force and smothering ability • Why agitating or splashing a burning liquid is dangerous

💭 Think About

• Which agent would strike the surface of the burning liquid with the greatest physical force, potentially spreading the fuel or breaking the surface of the liquid? • Which methods (steam smothering, low-velocity fog, dry chemical) are designed more to blanket/smother the fire rather than blast into it? • Think about what happens if you hit a pan of burning oil with a strong water stream—what is the similar risk with one of these agents?

✅ Before You Answer

• Identify which choice produces the highest impact velocity at the fire surface • Confirm which agents are commonly used successfully on Class B (flammable liquid) fires without excessive splashing • Eliminate any option that is specifically designed to gently blanket or smother the fuel surface rather than drive into it