What effect does water temperature have on friction loss?

The correct understanding is that temperature does not significantly affect friction loss in the context of firefighting and hose operations. Friction loss is primarily influenced by the diameter of the hose, the length of the hose, and the flow rate of the water. While water properties such as viscosity can change slightly with temperature, these changes are not substantial enough to create a discernible impact on friction loss in practical firefighting scenarios.

In firefighting practice, the primary considerations are the mechanical aspects of the hose and water flow dynamics, rather than thermal effects on the fluid. Thus, recognizing that temperature is not a significant factor allows firefighters to make more informed decisions regarding water supply and hose management without unnecessary concern over temperature variations.