Which fire extinguisher class is represented by a red square?

A red square symbol is used to represent Class B fire extinguishers. Class B extinguishers are specifically designed to combat fires that involve flammable liquids such as gasoline, oil, grease, and other similar substances. These types of fires require different suppression methods than those for other classes, as using water on flammable liquid fires can exacerbate the situation, making it crucial for responders to use the correct type of extinguisher. The color coding system is part of standardized fire safety practices to ensure quick identification and appropriate response during emergencies. Understanding this classification helps individuals make informed decisions in critical situations involving flammable liquids.