What is the primary purpose of a Type B extinguisher?

The primary purpose of a Type B extinguisher is to control flammable liquid and gas fires. These fires can be caused by materials such as gasoline, oil, grease, and other flammable liquids, which require specific handling compared to other types of fires. Type B extinguishers are designed with agents that effectively smother the flames and cut off the oxygen supply, thereby extinguishing the fire.

Understanding the nature of fires involving flammable liquids is crucial. These substances can ignite quickly and spread rapidly, making it essential to use an extinguisher that is specifically rated for such situations. Type B extinguishers feature agents like foam, dry chemical, or carbon dioxide that interrupt the combustion process of these types of materials, making them effective in safely putting out these fires.

Other options focus on different fire classes. For instance, extinguishing ordinary combustibles is the role of Type A extinguishers; fires involving electrical equipment require an extinguisher that does not conduct electricity, typically a Type C; and fires involving combustible metals need special extinguishers designated for that purpose, such as Type D. Each type of extinguisher is designed for specific fire scenarios, emphasizing the importance of using the right one based on the nature of the fire.