FLSD Fire Suppression Systems 4 — Questions and Answers
Question 1: A pre-action sprinkler system requires which condition before water is discharged?
- Heat alone activates sprinkler heads
- A detection event AND sprinkler head activation (Correct answer)
- Only smoke detector activation
- Manual override by the fire warden
Correct answer: A detection event AND sprinkler head activation
Pre-action systems require both a detection event (from a smoke or heat detector) and individual sprinkler head activation, providing two steps of confirmation before water flows.
Question 2: Which type of fire suppression agent is most appropriate for protecting a server room with sensitive electronic equipment?
- Dry chemical powder
- Clean agent (e.g., FM-200 or Novec 1230) (Correct answer)
- Water mist
- Carbon dioxide (CO2)
Correct answer: Clean agent (e.g., FM-200 or Novec 1230)
Clean agents such as FM-200 or Novec 1230 suppress fire without leaving residue and are electrically non-conductive, making them ideal for protecting electronic equipment.
Question 3: What is the primary purpose of a fire department connection (FDC) on a sprinkler system?
- To drain the system after activation
- To allow firefighters to boost water pressure to the system (Correct answer)
- To test sprinkler heads individually
- To connect the alarm panel to the city water main
Correct answer: To allow firefighters to boost water pressure to the system
The FDC allows fire department pumper trucks to supplement or restore water supply and pressure to the building's sprinkler system during firefighting operations.
Question 4: Under NFPA 13, what is the minimum clearance required between the top of storage and sprinkler deflectors?
- 6 inches
- 12 inches
- 18 inches (Correct answer)
- 24 inches
Correct answer: 18 inches
NFPA 13 requires a minimum 18-inch clearance between the top of storage and sprinkler deflectors to ensure proper water distribution when sprinklers activate.
Question 5: A deluge sprinkler system differs from a standard wet-pipe system because it:
- Uses pressurized air instead of water
- Has open sprinkler heads that all discharge simultaneously when triggered (Correct answer)
- Requires manual activation only
- Discharges only through the sprinkler closest to the fire
Correct answer: Has open sprinkler heads that all discharge simultaneously when triggered
Deluge systems have open (non-fusible) sprinkler heads, and when the deluge valve opens due to fire detection, water flows from all heads simultaneously across the entire zone.
Question 6: What color coding indicates a sprinkler head with a temperature rating of 135–170°F (standard response)?
- Red
- Blue
- Orange or red
- Uncolored or black (Correct answer)
Correct answer: Uncolored or black
Standard-response sprinkler heads rated 135–170°F are uncolored (natural brass) or black, per NFPA 13 color-coding requirements.
Question 7: When must a fire pump be tested as part of a building's fire suppression maintenance program?
- Once every 5 years only
- Weekly for flow testing and annually for full performance testing (Correct answer)
- Monthly for full flow and quarterly for churn testing
- Only after any fire event
Correct answer: Weekly for flow testing and annually for full performance testing
NFPA 25 requires fire pumps to be run weekly (churn/no-flow test) and subjected to a full annual flow test to verify rated performance.
FLSD Fire Suppression Systems 4
A pre-action sprinkler system requires which condition before water is discharged?