What extinguishing agents are typically found in Type B extinguishers?

Type B extinguishers are specifically designed to combat fires involving flammable liquids, such as gasoline, oils, and solvents. The extinguishing agents that are typically used in these extinguishers include carbon dioxide and dry chemical powders.

Carbon dioxide is effective because it displaces oxygen, thereby suffocating the fire and preventing combustion. Dry chemical powders, like those containing sodium bicarbonate or potassium bicarbonate, function by interrupting the chemical reaction that is sustaining the fire, acting rapidly to cool the burning material and prevent rekindling.

The inclusion of water in a Type B extinguisher is inappropriate because water can spread flammable liquids and potentially worsen the fire situation. Thus, agents like carbon dioxide and dry chemical powders are prioritized to safely and effectively address flammable liquid fires.