Which factor directly affects friction loss in a hose line?

• A. The Length of Hose
• B. The Number of Bends
• C. The Color of the Hose
• D. The Material of the Couplings

Answer: (B)

Water flow loses energy as it moves through the hose, and those losses come from two sources: the straight length (major losses) and fittings or turns (minor losses). Every bend disrupts the flow, causing turbulence and a defined amount of pressure loss. Add more bends, and you accumulate more of this loss, increasing the total friction loss. That direct connection between how many bends are in the line and the overall friction loss is why this factor is the best answer. The color offers no hydraulic effect, the coupling material only has a minor impact on roughness, and while longer hose does increase loss, the question highlights the direct impact of bends.