🔍 Key Concepts

• Class B fires involve flammable liquids and gases, not ordinary combustibles • How dry chemical extinguishing agents actually stop the burning process • The difference between smothering a fire and cooling a fire

💭 Think About

• Ask yourself: What keeps a flammable liquid from reigniting once the flame is knocked down? • Which property of a fire triangle (heat, fuel, oxygen) does a dry chemical mainly affect? • If the fuel surface is still hot after discharge, what does that mean for the chance of reflash?

✅ Before You Answer

• Verify which option mentions cooling and think about whether dry chemical significantly lowers fuel temperature • Consider whether dry chemical stays on the surface long enough to prevent reignition or if it can dissipate or be disturbed • Eliminate any choice that claims dry chemical is not effective on Class B fires, based on what you know about standard fire extinguishers