What is the hose coefficient for 5 inch hose?

What is the hose coefficient for 5 inch hose?

• A. 1
• B. 0.5
• C. 3
• D. 2

Answer: (A)

In fire hose hydraulics, the hose coefficient is the factor used in the friction loss calculation to reflect the hose’s size and roughness. For a 5-inch hose, that coefficient is set to 1, serving as the baseline value in standard charts. This means friction loss scales with flow rate squared and length, while the diameter term already accounts for the hose size, with the 5-inch size using the unit coefficient. The other numbers would correspond to different hoses or chart references, not the standard 5-inch value. So 1 is the correct coefficient for a 5-inch hose.

In fire hose hydraulics, the hose coefficient is the factor used in the friction loss calculation to reflect the hose’s size and roughness. For a 5-inch hose, that coefficient is set to 1, serving as the baseline value in standard charts. This means friction loss scales with flow rate squared and length, while the diameter term already accounts for the hose size, with the 5-inch size using the unit coefficient. The other numbers would correspond to different hoses or chart references, not the standard 5-inch value. So 1 is the correct coefficient for a 5-inch hose.