Ohio Volunteer Firefighter Practice Exam

What is the function of the riser in a sprinkler system?

1. Control water pressure

2. Distribute water

3. Store water

4. Direct water flow

The correct answer is: Distribute water

The riser in a sprinkler system serves the crucial function of distributing water throughout the system. It is typically a vertical pipe that connects the water supply to various horizontal piping systems where sprinklers are attached. The riser's primary role is to transport water from the source, such as a water tank or main supply line, and deliver it efficiently to the sprinkler heads. In addition to distributing water, the riser may also accommodate pressure control devices and valves, which ensure that the proper amount of water flows to each sprinkler head when the system is activated. This distribution is essential for effective fire suppression and ensuring that the entire area is adequately covered by the sprinkler system when needed. The other choices present functions that are not directly associated with the role of the riser. While controlling pressure and directing water flow are important aspects of a sprinkler system, they are typically managed through other components like pressure regulators and control valves. Storing water is also not a function of the riser, as that role is fulfilled by tanks or storage reservoirs located elsewhere in the system.