FDNY Fire Life & Safety Director Practice Test

The position of all main control valves and riser isolation valves must be open for normal operations because these valves are critical to the functionality of fire protection systems, including sprinklers and standpipes. When these valves are open, it ensures that water is available and can flow through the system, allowing it to activate in the event of a fire.

If the valves are closed, it can impede the response of fire suppression systems, which can have serious consequences in an emergency situation. Therefore, maintaining these valves in the open position is essential for ensuring that the fire protection systems are fully operational and ready to respond effectively when needed.

While locking and monitoring these valves are important safety and operational strategies, they do not replace the necessity of having the valves in the open position during normal operations to ensure that the fire protection system is functional.