In reference to a fire stream, friction loss is:

In reference to a fire stream, friction loss is:

• A. That part of the pressure used to overcome friction in the hose.
• B. Pressure lost to elevation
• C. In the nozzle only
• D. Static pressure

Answer: (A)

Friction loss in a fire stream is the pressure drop that occurs as water flows through hose, fittings, and other components, caused by the resistance of those interior surfaces. This portion of the pump discharge pressure is what you must overcome to move the water through the hose, so the remaining pressure available at the nozzle is reduced by that amount. It applies along the entire hose line and increases with flow rate, length, and the number of fittings. This differs from elevation pressure (pressure due to height) and static pressure (pressure when there is no flow). So the best description is that friction loss is the part of the pressure used to overcome friction in the hose.

Friction loss in a fire stream is the pressure drop that occurs as water flows through hose, fittings, and other components, caused by the resistance of those interior surfaces. This portion of the pump discharge pressure is what you must overcome to move the water through the hose, so the remaining pressure available at the nozzle is reduced by that amount. It applies along the entire hose line and increases with flow rate, length, and the number of fittings. This differs from elevation pressure (pressure due to height) and static pressure (pressure when there is no flow). So the best description is that friction loss is the part of the pressure used to overcome friction in the hose.