When tying the pumper into a plug, what percentage rate allows for the addition of three additional lines?

The correct answer reflects the specific flow capabilities and operational procedures related to fire department pump operations. When tying the pumper into a plug, maintaining a flow rate of 0-10% ensures that the system's pressure and flow can be adequately managed. This lower percentage not only allows for the addition of three additional lines but also helps to prevent strain on the water supply system.

By keeping the flow within this range, firefighters can ensure there is sufficient volume and pressure for the added lines while reducing the risk of depleting the water source or creating a situation where the lines exceed the capacity of the system. Thus, this percentage is critical for safe and effective operations during firefighting scenarios. This understanding enhances tactical decisions during fire suppression, ensuring efficiency and safety in operations.