What is a class B fire?

What is a class B fire?

• A. This is a fire which involves any flammable liquids like oil, solvents and grease!
• B. This is a fire involving ordinary combustibles.
• C. This is a fire involving electrical equipment.
• D. This is a fire involving pressurized gases.

Answer: (A)

Fire classifications group fires by what is burning. The description that matches Class B is fires involving flammable liquids such as oil, solvents, and grease. These liquids ignite easily and their vapors can travel and spread flames, so they aren’t best fought with water. Instead, extinguishing agents like foam, dry chemical powders, or CO2 are used, which form barriers between the fuel and the air or interrupt the chemical reactions. Think of other common categories to see why this fits Class B better: fires from ordinary combustibles like wood and paper fall under a different class; electrical equipment fires are categorized separately due to energized circuits; and fires involving pressurized gases describe another distinct hazard requiring different approaches.

Fire classifications group fires by what is burning. The description that matches Class B is fires involving flammable liquids such as oil, solvents, and grease. These liquids ignite easily and their vapors can travel and spread flames, so they aren’t best fought with water. Instead, extinguishing agents like foam, dry chemical powders, or CO2 are used, which form barriers between the fuel and the air or interrupt the chemical reactions.

Think of other common categories to see why this fits Class B better: fires from ordinary combustibles like wood and paper fall under a different class; electrical equipment fires are categorized separately due to energized circuits; and fires involving pressurized gases describe another distinct hazard requiring different approaches.