Class B fires? Extinguishing agent?

Class B fires? Extinguishing agent?

• A. Water
• B. Dry chemical
• C. Co2, foam, clean agent, dry chemical
• D. ABC dry chem

Answer: (C)

Class B fires involve flammable liquids, so the extinguishing approach should prevent the liquid from continuing to burn by smothering, separating fuel from air, cooling, or interrupting the flame chemistry. Water is not used on these fires because it can spread the liquid and make the blaze worse. The agents listed in the best answer cover the main effective options for Class B fires. Foam blankets the liquid surface and separates fuel from air while cooling. CO2 displaces some of the oxygen, helpful in small or enclosed areas. Clean agents (gas-based) interrupt the chemical reactions occurring in the flame and are effective in enclosed spaces. Dry chemical powders coat the fuel surface and disrupt the flame chemistry, helping to smother the fire. So, choosing an extinguishing agent set that includes CO2, foam, clean agent, and dry chemical aligns with the various effective methods for Class B fires, whereas water is inappropriate for this fire type.

Class B fires involve flammable liquids, so the extinguishing approach should prevent the liquid from continuing to burn by smothering, separating fuel from air, cooling, or interrupting the flame chemistry. Water is not used on these fires because it can spread the liquid and make the blaze worse.

The agents listed in the best answer cover the main effective options for Class B fires. Foam blankets the liquid surface and separates fuel from air while cooling. CO2 displaces some of the oxygen, helpful in small or enclosed areas. Clean agents (gas-based) interrupt the chemical reactions occurring in the flame and are effective in enclosed spaces. Dry chemical powders coat the fuel surface and disrupt the flame chemistry, helping to smother the fire.

So, choosing an extinguishing agent set that includes CO2, foam, clean agent, and dry chemical aligns with the various effective methods for Class B fires, whereas water is inappropriate for this fire type.