Which of the following is the formula for friction loss?

The formula for friction loss is commonly represented as FL = CQ²L, where FL stands for friction loss, C is the coefficient for the type of hose or water flow, Q is the flow rate in gallons per minute (GPM), and L is the length of the hose in hundreds of feet.

This formula reflects the relationship between flow rate and friction loss, indicating that friction loss increases with the square of the flow rate. As the flow rate doubles, for instance, the friction loss will increase by a factor of four. The length of the hose contributes proportionately to the total friction loss, as longer hoses generally introduce more resistance to the flow of water.

Understanding this formula is crucial for fire engineers and firefighters alike, as it allows them to calculate the expected pressure loss in hoses under different conditions, ensuring they can effectively deliver water to extinguish fires. Proper calculations based on this formula can assist in selecting appropriate pumping strategies and equipment, ultimately leading to more efficient fire suppression efforts.