You are fighting a class "B" fire with a...

You are fighting a class "B" fire with a...

Question 1 of 31048fy_heal_CREATE_q360_2022

You are fighting a class "B" fire with a portable dry chemical extinguisher. How should the discharge be directed?

Question 1 of 31048

Q

You are fighting a class "B" fire with a portable dry chemical extinguisher. How should the discharge be directed?

🔍 Key Concepts

• Class B fire characteristics (flammable liquids and gases) and how they spread • Proper use of a portable dry chemical extinguisher (sweeping motion and distance) • Difference between top of the flames, body of the fire, and seat (base) of the fire

💭 Think About

• Where does the fuel for a class B fire actually burn: in the flames above, in the smoke, or right at the surface of the liquid/gas? • If you direct the agent too hard or in the wrong place on a liquid fire, what might happen to the burning fuel (think splashing or spreading)? • When starting your attack on a pool of burning liquid, would it be safer to begin closest to you or farther away, and why?

✅ Before You Answer

• Identify where the extinguishing agent is most effective: at the fuel surface or in the flames above it • Consider how to use a sweeping motion to push and cover the burning surface without splashing or spreading the fuel • Eliminate any options that would tend to blow burning liquid around or only cool the flames instead of cutting off the fuel/oxygen mix