What is the coefficient for a 5" hose?

The coefficient for a 5" hose is commonly accepted as 0.05. This is derived from hydraulic calculations where the friction loss in fire hoses is assessed based on their diameter and the length of the hose. The smaller the diameter of the hose, the higher the friction loss tends to be, but as the diameter increases, the friction loss decreases.

Using a 5" hose allows for a significantly reduced friction loss, which is essential in fire suppression operations to maintain effective water flow during firefighting efforts. The coefficient reflects this reduction and aids fire engineers in calculating the expected pressure loss across the length of the hose for accurate firefighting strategies. The other options, with their respective coefficients, do not accurately represent the standard calculated values used in current firefighting practices for a 5" hose diameter.