Which type of stream is used primarily with foams to suppress flammable liquid fires?

A fog stream is predominantly used with foams to effectively suppress flammable liquid fires. This type of stream allows for the efficient distribution of the foam blanket over the surface of the burning liquid, creating a barrier that suppresses vapor release and cools the fire. The fine droplets in a fog stream also help to enhance the fire suppression capabilities by providing a larger surface area for the foam to interact with the flames, ensuring better coverage.

Understanding the characteristics of fog streams is essential in fire suppression scenarios involving flammable liquids, as they can also minimize the risk of splashing, which could otherwise exacerbate the situation. When deployed correctly, fog streams combined with foam agents are effective in preventing re-ignition and controlling the spread of the fire.