Which fire classes are typically addressed by portable extinguishers in the United States?

• A. Class A extinguishers only
• B. Class B and Class K extinguishers
• C. Class A, Class B, and Class C extinguishers
• D. Class D and Class K extinguishers

Answer: (C)

The main idea being tested is what kinds of fires portable extinguishers in the United States are designed to handle. Most portable extinguishers are multipurpose and labeled for Class A, Class B, and Class C fires. That means they’re meant to deal with ordinary combustibles like wood and paper (Class A), flammable liquids like gasoline or solvents (Class B), and electrical fires involving energized equipment (Class C). This combination covers the most common fire hazards you’ll encounter in homes, offices, and many workplaces, making ABC extinguishers the typical choice.

Specialized hazards exist too: Class K extinguishers are designed for cooking oils and fats, and Class D extinguishers are made for certain metal fires. Those require specific types of agents and aren’t considered part of the standard portable extinguishers used in most everyday settings. So, the reason this question points to Class A, Class B, and Class C is because those are the fires most portable extinguishers are designed to combat in the United States.