Sprinkler System Requirements Flashcards

What NFPA standard governs the inspection, testing, and maintenance of water-based fire protection systems?

Answer: NFPA 25

NFPA 25 is the Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems.

A concealed sprinkler head has a cover plate that falls away at what approximate temperature?

Answer: 135°F

Concealed sprinkler cover plates are designed to release at approximately 135°F, allowing the sprinkler to operate at its rated temperature.

In a pre-action sprinkler system, water enters the piping only when:

Answer: Both a detection device activates AND a sprinkler head fuses

A double-interlock pre-action system requires both a detection device activation and a sprinkler head fusing before water is discharged.

What is the minimum required water supply duration for a light hazard sprinkler system per NFPA 13?

Answer: 60 minutes

NFPA 13 requires light hazard sprinkler systems to have a water supply capable of meeting demand for a minimum of 30 minutes.

What component prevents backflow of water from the sprinkler system into the potable water supply?

Answer: Backflow preventer

A backflow preventer is required to stop contaminated sprinkler system water from flowing back into the potable water supply.

According to NFPA 13, sprinkler heads subject to mechanical damage must be protected by:

Answer: A wire cage or guard

NFPA 13 requires sprinkler heads exposed to mechanical damage (such as in parking garages or industrial areas) to be protected with wire guards.

What term describes the pressure measured at the base of a sprinkler riser while water is flowing?

Answer: Residual pressure

Residual pressure is the pressure remaining in the system at the point of measurement while water is flowing at a specified rate.