How many classes of fire are there?

• A. Four
• B. Six
• C. Five
• D. Three

Answer: (C)

Fire classification groups fires by the material or condition feeding them so responders know how to fight them most safely and effectively. In the standard system taught for correctional facilities, there are five main classes: ordinary combustibles such as wood and paper; flammable liquids like gasoline; energized electrical equipment; combustible metals; and cooking oils. This five-category framework lets responders quickly identify the likely extinguishing method and safety precautions for each scenario. While some regions use variations (for example different labels for cooking fats), the commonly taught count in this context is five. So, the correct number to remember is five.