Florida Fire State Practice Exam

What does the sprinkler system feed main connect to?

1. Check valve

2. Main drain

3. Cross mains

4. Riser

The correct answer is: Cross mains

The connection of the sprinkler system feed main to the cross mains is an essential aspect of how fire sprinkler systems are designed to distribute water effectively throughout a facility. Cross mains are the horizontal pipes that run between the risers and are responsible for carrying water to different areas of the building where branch lines are connected to supply the sprinklers. When the feed main connects to the cross mains, it allows for the efficient transfer of water from a water supply source into the system, ensuring that when a sprinkler activates, there is adequate and immediate water flow available to control or extinguish a fire. This configuration ensures that various sections of the building can be supplied with water simultaneously, which is crucial for effective fire suppression. In contrast, the other options have different roles in a fire sprinkler system, such as the check valve, which prevents backflow and ensures that water only flows in the intended direction; the main drain, which is used for testing and draining the system; and the riser, which is the vertical pipe that carries water from the supply to the cross mains and branch lines. Thus, the proper functioning of a fire sprinkler system heavily relies on the correct connection and relationship between the feed mains and the cross mains.