Which fire extinguisher is used for flammable substances such as grease, oil, or gas fires?

• A. Type C fire extinguisher
• B. Type A fire extinguisher
• C. Type B fire extinguisher
• D. Type D fire extinguisher

Answer: (C)

When you pick a fire extinguisher, you match the extinguisher to the fuel type. Fires from flammable liquids like grease, oil, or gas are Class B fires, so they’re fought with a Class B extinguisher. These extinguishers use agents such as dry chemical powder, foam, or CO2 to smother the flame or separate the fuel from the air and slow the chemical reaction. Water should not be used on grease or oil fires, as it can cause the fire to spread. Other classes cover different fuels: ordinary combustibles need a different class, electrical fires require a non-conductive option, and metal fires need a specialized agent. So for grease, oil, or gas fires, the correct choice is the Class B extinguisher.