FPE Quality Control & Inspection 3 — Questions and Answers
Question 1: When inspecting a dry pipe sprinkler system, what is the acceptable maximum time from dry pipe valve trip to water discharge at the inspector's test connection?
- 30 seconds
- 45 seconds
- 60 seconds (Correct answer)
- 90 seconds
Correct answer: 60 seconds
NFPA 13 and NFPA 25 require that water reach the inspector's test connection within 60 seconds of dry pipe valve operation.
Question 2: A quality control inspector reviewing fire pump installation documentation notices the pump test curve does not match the listed nameplate rating. What is the most appropriate action?
- Accept if pump exceeds nameplate at rated point
- Require the pump to be re-tested under controlled conditions
- Reject and require replacement of the pump
- Notify the authority having jurisdiction and document the discrepancy (Correct answer)
Correct answer: Notify the authority having jurisdiction and document the discrepancy
Discrepancies between test data and nameplate ratings must be documented and the AHJ notified to determine acceptance or corrective action.
Question 3: What is the minimum clearance required between sprinkler deflectors and the top of storage, per NFPA 13 for standard spray upright sprinklers?
- 6 inches
- 12 inches
- 18 inches (Correct answer)
- 24 inches
Correct answer: 18 inches
NFPA 13 requires a minimum 18-inch clearance between sprinkler deflectors and the top of storage to allow proper water distribution.
Question 4: During an ITM visit, an inspector identifies a fire department connection that is missing its caps. Which NFPA standard addresses this deficiency?
- NFPA 13
- NFPA 14
- NFPA 25 (Correct answer)
- NFPA 1
Correct answer: NFPA 25
NFPA 25 governs the inspection, testing, and maintenance of water-based systems including fire department connections and their caps.
Question 5: What type of sprinkler is required in concealed spaces containing exposed combustible construction per NFPA 13?
- Extended coverage sprinklers only
- Standard spray sprinklers with a higher density
- Sprinklers are required in the concealed space (Correct answer)
- No sprinklers are required if the space is unoccupied
Correct answer: Sprinklers are required in the concealed space
NFPA 13 requires sprinklers in concealed spaces that contain exposed combustible construction materials.
Question 6: A fire protection engineer is reviewing shop drawings for a new wet pipe system. The drawings show sprinklers installed with the deflector 6 inches below the roof deck. Why is this problematic?
- Deflectors must be at least 1 inch below the roof deck
- Deflectors must be between 1 and 12 inches below the roof deck or ceiling (Correct answer)
- Deflectors must be at least 12 inches below the roof deck
- Deflector position is only relevant for dry pipe systems
Correct answer: Deflectors must be between 1 and 12 inches below the roof deck or ceiling
NFPA 13 requires sprinkler deflectors to be positioned between 1 inch and 12 inches below ceilings or roof decks for standard spray sprinklers.
Question 7: Which test method is used to verify the integrity of pre-action and deluge system piping that is normally dry?
- Hydrostatic test at 200 psi for 2 hours
- Air pressure test at 40 psi for 24 hours
- Low-pressure air test at 40 psi for 2 hours (Correct answer)
- Hydrostatic test at 50 psi above working pressure for 30 minutes
Correct answer: Low-pressure air test at 40 psi for 2 hours
NFPA 13 permits testing of dry and pre-action systems with air at 40 psi for 2 hours to check for leaks without introducing water.
FPE Quality Control & Inspection 3
When inspecting a dry pipe sprinkler system, what is the acceptable maximum time from dry pipe valve trip to water discharge at the inspector's test connection?