There is always a lower water pressure at the fire hose outlet than is found at the discharge of the pump. Which of the following reasons is the common cause of this loss in pressure?

Correct Answer: Option A — Friction in the piping and valves

Head loss in a ship's fire main is primarily caused by fluid friction against pipe interior walls, turbulence at fittings, and flow restrictions across valves. As volumetric flow increases, frictional resistance escalates, reducing residual pressure at the discharge outlet compared to the pump.