Which term is not friction loss?

Which term is not friction loss?

• A. Engine Pressure
• B. Back Pressure
• C. Nozzle Pressure
• D. Appliance Pressure

Answer: (B)

Friction loss is the pressure drop caused by water moving through hose, fittings, and appliances as it flows. The nozzle pressure is the pressure you want at the nozzle to achieve the desired spray; it’s a target value, not a loss term itself. Appliance pressure represents the pressure drop that occurs when water passes through devices such as valves, adapters, or other fittings in the line. Engine pressure is the pump discharge pressure—the total pressure the pump must produce to overcome the friction losses plus the nozzle and appliance requirements. Back pressure is the pressure opposing the flow in the downstream system; it’s not a friction loss in the hose or fittings. So, the term that is not friction loss is back pressure.

Friction loss is the pressure drop caused by water moving through hose, fittings, and appliances as it flows. The nozzle pressure is the pressure you want at the nozzle to achieve the desired spray; it’s a target value, not a loss term itself. Appliance pressure represents the pressure drop that occurs when water passes through devices such as valves, adapters, or other fittings in the line. Engine pressure is the pump discharge pressure—the total pressure the pump must produce to overcome the friction losses plus the nozzle and appliance requirements. Back pressure is the pressure opposing the flow in the downstream system; it’s not a friction loss in the hose or fittings. So, the term that is not friction loss is back pressure.