FLSD Fire Suppression Systems 1 — Questions and Answers
Question 1: What type of sprinkler system maintains water in the pipes at all times, ready for immediate discharge?
- Dry pipe system
- Wet pipe system (Correct answer)
- Pre-action system
- Deluge system
Correct answer: Wet pipe system
A wet pipe sprinkler system keeps water under pressure in the pipes at all times, allowing immediate discharge the moment a sprinkler head fuses.
Question 2: In a dry pipe sprinkler system, what substance fills the pipes in place of water?
- Pressurized air or nitrogen (Correct answer)
- Carbon dioxide
- Halon gas
- Argon
Correct answer: Pressurized air or nitrogen
Dry pipe systems use pressurized air or nitrogen to hold a clapper valve closed, keeping water out of the pipes until a sprinkler head opens.
Question 3: A Class I standpipe system provides hose connections intended for use by which group?
- Building occupants only
- Fire department personnel (Correct answer)
- Security staff with basic training
- Both occupants and fire department equally
Correct answer: Fire department personnel
Class I standpipe systems provide 2.5-inch hose connections designed exclusively for use by trained fire department personnel.
Question 4: Which NFPA standard governs the installation of automatic sprinkler systems in commercial buildings?
- NFPA 10
- NFPA 13 (Correct answer)
- NFPA 25
- NFPA 72
Correct answer: NFPA 13
NFPA 13 is the Standard for the Installation of Sprinkler Systems and sets requirements for design, installation, and materials.
Question 5: What is the primary purpose of a fire department connection (FDC) on a building's exterior?
- To drain the sprinkler system after use
- To allow FDNY to supplement the building's water supply to the system (Correct answer)
- To test sprinkler flow rates during inspections
- To connect portable fire extinguisher refill lines
Correct answer: To allow FDNY to supplement the building's water supply to the system
The FDC allows fire department apparatus to pump additional water into the sprinkler or standpipe system, supplementing the building's own water supply during a fire.
Question 6: A pre-action sprinkler system requires which two events before water is discharged?
- A smoke detector activation and a manual pull station
- A detection device activation AND a sprinkler head fusing open (Correct answer)
- Two independent smoke alarms activating simultaneously
- Heat detector activation and FLSD manual override
Correct answer: A detection device activation AND a sprinkler head fusing open
Pre-action systems require both a detection device (smoke or heat) to open a control valve AND a sprinkler head to thermally fuse before water flows, providing dual protection against accidental discharge.
Question 7: Which type of sprinkler head responds most rapidly due to its smaller thermal sensing element?
- Standard response
- Quick response (Correct answer)
- Extended coverage
- Large drop
Correct answer: Quick response
Quick response sprinkler heads have a smaller glass bulb or fusible link that activates faster than standard response heads, improving early fire suppression and life safety.
