Which of the following is NOT a function of water when fighting fires?

Water plays a crucial role in firefighting, primarily due to its ability to manage heat and control flames. When water is applied to a fire, it cools the burning materials, which effectively reduces the temperature, ultimately leading to the extinguishment of the fire. This cooling effect is vital as it helps to absorb heat, preventing the fire from spreading and allowing for a safer environment for firefighting personnel.

Additionally, water can create a barrier between flammable materials and the fire, contributing to the prevention of ignition and the spread of flames. This function is essential for securing the area and protecting both lives and property.

Creating friction, on the other hand, is not a function of water in the context of fire suppression. Water is typically applied to minimize friction on surfaces and facilitate smoother engagement with burning materials. Its role in firefighting is to eliminate heat and not to introduce friction, which would be counterproductive in the process of controlling a fire. Therefore, recognizing that creating friction does not align with the intended uses of water in firefighting is key to understanding its actual functions in this context.