CFI Sprinkler System Requirements 3 — Questions and Answers
Question 1: What NFPA standard governs the inspection, testing, and maintenance of water-based fire protection systems?
- NFPA 1
- NFPA 13
- NFPA 25 (Correct answer)
- NFPA 72
Correct answer: NFPA 25
NFPA 25 is the Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems.
Question 2: A concealed sprinkler head has a cover plate that falls away at what approximate temperature?
- 100°F
- 135°F (Correct answer)
- 165°F
- 212°F
Correct answer: 135°F
Concealed sprinkler cover plates are designed to release at approximately 135°F, allowing the sprinkler to operate at its rated temperature.
Question 3: In a pre-action sprinkler system, water enters the piping only when:
- A sprinkler head fuses
- A detection device activates
- Both a detection device activates AND a sprinkler head fuses (Correct answer)
- The control panel is manually activated
Correct 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.
Question 4: What is the minimum required water supply duration for a light hazard sprinkler system per NFPA 13?
- 15 minutes
- 30 minutes
- 60 minutes (Correct answer)
- 90 minutes
Correct 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.
Question 5: What component prevents backflow of water from the sprinkler system into the potable water supply?
- Pressure reducing valve
- Backflow preventer (Correct answer)
- Check valve at the riser
- Flow control valve
Correct answer: Backflow preventer
A backflow preventer is required to stop contaminated sprinkler system water from flowing back into the potable water supply.
Question 6: According to NFPA 13, sprinkler heads subject to mechanical damage must be protected by:
- A wire cage or guard (Correct answer)
- An extended-coverage deflector
- An ESFR head upgrade
- A higher temperature rating
Correct 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.
Question 7: What term describes the pressure measured at the base of a sprinkler riser while water is flowing?
- Static pressure
- Residual pressure (Correct answer)
- Working pressure
- Velocity pressure
Correct 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.
CFI Sprinkler System Requirements 3
What NFPA standard governs the inspection, testing, and maintenance of water-based fire protection systems?