Question

The top of a standpipe riser extends up onto the roof where it is kept as a dry system. Three hose connections are attached to the top of the standpipe riser. These three connections make up the:

Answer 1

The three hose connections at the top of the standpipe riser form the fire department connections (FDCs), part of the building's fire protection system to aid firefighters in pumping water during emergencies.

Step-by-step explanation:

The three hose connections attached to the top of the standpipe riser on a roof, which configure a dry system, make up the fire department connections (FDCs). These connections are an integral part of a building's fire protection system, designed to allow the fire department to pump supplemental water into the system during fire-fighting operations. The presence of FDCs is critical for ensuring that adequate water pressure and supply can be provided to all floors of a building, especially in high-rise structures where the built-in water system may not be sufficient to reach the upper levels in an emergency.