How many 2 1/2 inch hoses does it take to supply a monitor?

To supply a monitor, which is a device used for directing water in firefighting operations, the standard practice is to use three 2 1/2 inch hoses. The reasoning behind this is based on the need to maintain adequate water flow and pressure to effectively operate the monitor.

When you supply a monitor, it requires a significant volume of water, and using three hoses is generally sufficient to achieve the necessary flow rate while balancing the pressure needed for effective water delivery.

The other choices do not align with typical operational protocols for monitor supply. Using less than three hoses may not provide enough water pressure, while more than three could be unnecessary for most situations, potentially leading to complications in handling and logistics on the fireground. Therefore, three hoses strike a balance between adequate supply and operational efficiency which is why this is considered the correct answer.