What is Class B fire?

• A. Fires burning liquids, like fuel and oil
• B. Fires of organic materials that leave ash
• C. Electrical fires
• D. Fires in metals

Answer: (A)

Class B fires involve flammable liquids and gases, such as fuel and oil. These fires are caused by liquids that can produce flammable vapors, which can spread across a surface or through the air and ignite quickly. Because the fuel is the source of the flame, the goal is to blanket or otherwise remove the fuel from the heat and air—typical extinguishing methods include foam, dry chemical, or CO2. Water is usually not ideal for these fires because it can spread the liquid and spread the fire. On ships, use extinguishers and agents rated for Class B, and shut off the fuel source when safe to do so.