Class B extinguishers are designed for fires involving which materials?

Class B extinguishers are designed for fires involving which materials?

• A. Flammable Liquids
• B. Electrical Equipment
• C. Ordinary Combustibles
• D. Combustible Metals

Answer: (A)

The main idea is that extinguisher types are tied to the fuel involved in a fire. Class B extinguishers are designed for fires that involve flammable liquids such as gasoline, oil, solvents, and other petroleum-based liquids. The agents in these extinguishers work by smothering or isolating the fuel from the air, which is effective for liquids that can spread and continue to burn. Fires that involve ordinary combustibles like wood or paper fall under Class A, electrical equipment fires fall under Class C (energized electrical sources), and fires involving combustible metals fall under Class D. So for fires with flammable liquids, Class B is the appropriate choice.

The main idea is that extinguisher types are tied to the fuel involved in a fire. Class B extinguishers are designed for fires that involve flammable liquids such as gasoline, oil, solvents, and other petroleum-based liquids. The agents in these extinguishers work by smothering or isolating the fuel from the air, which is effective for liquids that can spread and continue to burn. Fires that involve ordinary combustibles like wood or paper fall under Class A, electrical equipment fires fall under Class C (energized electrical sources), and fires involving combustible metals fall under Class D. So for fires with flammable liquids, Class B is the appropriate choice.