What is the common agent used in Class B fire extinguishers?

What is the common agent used in Class B fire extinguishers?

• A. Water
• B. Carbon dioxide (CO2) or dry chemical agents
• C. Foam
• D. Sand

Answer: (B)

Class B fire extinguishers are specifically designed to extinguish fires that involve flammable liquids, such as gasoline, oil, and grease. The common agents used in these extinguishers are carbon dioxide (CO2) and dry chemical agents. Carbon dioxide is effective because it smothers the fire by displacing oxygen and does not leave any residue that could cause damage to equipment or property. Dry chemical agents, such as monoammonium phosphate, interrupt the chemical reaction occurring in the fire and can be effective on multiple classes of fire, including Class B. While foam can also be an effective extinguishing agent for Class B fires, it is not as commonly associated with Class B extinguishers as CO2 and dry chemical agents. Water is generally ineffective and can be dangerous when used on flammable liquid fires, and sand is typically used for small fires or as a supplemental tool rather than as a primary extinguishing agent.

Class B fire extinguishers are specifically designed to extinguish fires that involve flammable liquids, such as gasoline, oil, and grease. The common agents used in these extinguishers are carbon dioxide (CO2) and dry chemical agents.

Carbon dioxide is effective because it smothers the fire by displacing oxygen and does not leave any residue that could cause damage to equipment or property. Dry chemical agents, such as monoammonium phosphate, interrupt the chemical reaction occurring in the fire and can be effective on multiple classes of fire, including Class B.

While foam can also be an effective extinguishing agent for Class B fires, it is not as commonly associated with Class B extinguishers as CO2 and dry chemical agents. Water is generally ineffective and can be dangerous when used on flammable liquid fires, and sand is typically used for small fires or as a supplemental tool rather than as a primary extinguishing agent.