When using hose lines above ground level, how much pressure is typically added for each story of the building?

When operating hose lines above ground level, it is standard practice to add a specific amount of pressure for each story of the building to account for the elevation change. Typically, an increase of 5 psi for every story is the accepted standard in firefighting operations. This adjustment helps ensure that water reaches the needed height to effectively combat the fire, counteracting the effects of gravity and friction loss in the hose line.

Adding 5 psi per story is important for maintaining adequate pressure at the nozzle. It acknowledges the need for extra pressure due to the vertical lift required to deliver water to higher floors. This understanding is crucial for fire apparatus operators to provide sufficient water flow and pressure during firefighting operations, particularly in multi-story buildings.

The other options, while citing various pressure increments, do not reflect the commonly accepted standard that has been established in firefighting practice.