The black-labelled extinguisher is described as putting out which fires?

• A. Flammable liquids & Electrical fires
• B. Wood fires
• C. Cooking oils
• D. Water-based fires

Answer: (A)

The main idea here is recognizing extinguisher types by their contents and what fire classes they suppress. The black-labeled extinguisher is a carbon dioxide (CO2) unit. CO2 extinguishers work by displacing the air around the fire, suffocating the flames, and they are non-conductive, which makes them suitable for electrical equipment. This combination makes them effective on fires involving flammable liquids (Class B) and electrical fires (Class C). That is why it’s described as putting out flammable liquids and electrical fires. They’re not appropriate for solid fuel fires like wood (Class A) or for cooking-oil fires (Class F), where other agents are preferred. CO2 extinguishers can also be risky in occupied spaces due to asphyxiation, so they’re used with caution.