Class B corresponds to which type of material?

Class B corresponds to which type of material?

• A. Flammable Solids
• B. Flammable Liquids
• C. Flammable Gases
• D. Live Electrical Equipment

Answer: (B)

Fires are categorized by the fuel involved, and Class B is the label for flammable liquids. These liquids burn by releasing vapors that form an ignitable mixture, and they can spread across surfaces, so they often require extinguishing methods that blanket and cool the liquid rather than trying to smother a solid or chase a gas. Foam, dry chemical, or CO2 are effective because they cool and separate the fuel from the fire, preventing reignition. Examples include jet fuel, gasoline, kerosene, solvents, alcohols, and oils found on aircraft. This differs from solids like wood or paper (which are Class A) and from gases (another fire class), so the material type described by Class B is flammable liquids.

Fires are categorized by the fuel involved, and Class B is the label for flammable liquids. These liquids burn by releasing vapors that form an ignitable mixture, and they can spread across surfaces, so they often require extinguishing methods that blanket and cool the liquid rather than trying to smother a solid or chase a gas. Foam, dry chemical, or CO2 are effective because they cool and separate the fuel from the fire, preventing reignition. Examples include jet fuel, gasoline, kerosene, solvents, alcohols, and oils found on aircraft. This differs from solids like wood or paper (which are Class A) and from gases (another fire class), so the material type described by Class B is flammable liquids.