What is the required distance in feet behind a ground monitor for hose lines to minimize nozzle reaction?

The correct distance required behind a ground monitor for hose lines to minimize nozzle reaction is 10 feet. This distance is essential because it allows for safe maneuvering and operation of the monitor while controlling the substantial force produced by the nozzle reaction, which can be significant due to the high volumes of water being expelled.

Maintaining this distance helps ensure the safety of personnel operating the monitor as it provides enough space to avoid being knocked back by the force of the water. Firefighters can maintain better control of the hose lines and work effectively without the risk of injury from the nozzle reaction.

In practical scenarios, too short of a distance could lead to safety issues, while being too far might reduce the operational effectiveness and increase the difficulty of managing the hose lines. The standardization of this distance reflects best practices in fire service operations to protect responders and ensure effective firefighting strategies.