For a trash can fire, which portable extinguisher class is most appropriate?

• A. Class B
• B. Class C
• C. Class K
• D. Class A

Answer: (D)

Extinguishers are matched to the fuel type of the fire. A trash can fire is typically ordinary combustibles such as paper and cardboard, so an extinguisher rated for Class A fires is the best fit. Class A extinguishers work by cooling the burning material enough to stop the flame from continuing, which suits these common household or office waste fires. Class B is for flammable liquids, Class C for energized electrical fires, and Class K for cooking oils. In practice, a multipurpose ABC extinguisher can handle A, B, and C scenarios, but for a straightforward trash can fire, Class A is the most appropriate choice.