Sprinkler System Control Valves Flashcards
6 cards from real F01 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Sprinkler System Control Valves flashcards as text
What is the function of the main sprinkler system shut-off valve (OS&Y valve) in a building?
Answer: It is the primary valve that controls water supply to the entire sprinkler system or a major portion of it
The Outside Screw and Yoke (OS&Y) valve is the main control valve for the sprinkler system. Closing it cuts water supply to the entire system (or a defined section), which is why it requires an impairment notification and fire watch when closed.
What does a tamper switch on a sprinkler control valve do?
Answer: Sends a supervisory alarm signal to the fire alarm panel if the valve is moved from its fully open position
A tamper switch monitors the position of a control valve and sends a supervisory alarm signal to the fire alarm panel if the valve is moved from its fully open position, alerting building management of an impairment.
What visual indicator on an OS&Y gate valve confirms that the valve is in the fully open position?
Answer: The threaded screw stem is fully extended outward from the yoke
On an OS&Y valve, the threaded stem extends outward (up or out from the yoke) when the valve is fully open. When closed, the stem is retracted. This visual confirmation is how inspectors and fireguards verify valve position.
During a fire watch, an F-01 fireguard discovers a sprinkler control valve that appears partially closed but has no out-of-service tag. What action is required?
Answer: Do not touch the valve — immediately notify the impairment coordinator and building management
An untagged partially closed valve is an unauthorized impairment. The fireguard must not touch the valve but must immediately notify the impairment coordinator and building management to investigate and take appropriate action.
Why are sprinkler control valves typically required to be secured in the open position (chained, locked, or supervised)?
Answer: To prevent accidental or unauthorized closure, which would impair the sprinkler system without detection
Sprinkler control valves must be secured in the open position to prevent accidental bumping, unauthorized closure, or tampering from disabling the sprinkler system without the knowledge of building management or FDNY.
An inspector finds that a sprinkler zone control valve was left in the half-open position after maintenance work completed three days ago. What potential fire safety impact does this have?
Answer: The zone has been operating at reduced water pressure and flow for three days, potentially inadequate to control a fire — a full investigation and system test is required
A half-open valve reduces water flow to the zone, potentially below design levels. The system in that zone has been operating at reduced capacity for three days — a condition requiring immediate full investigation, valve adjustment, and system pressure test.