FPE Quality Control & Inspection 2 — Questions and Answers
Question 1: During hydrostatic testing of a sprinkler system, what is the minimum test pressure required per NFPA 13 when the system working pressure does not exceed 150 psi?
- 150 psi for 2 hours
- 200 psi for 2 hours (Correct answer)
- 175 psi for 30 minutes
- 250 psi for 1 hour
Correct answer: 200 psi for 2 hours
NFPA 13 requires hydrostatic testing at 200 psi for 2 hours when the system working pressure does not exceed 150 psi.
Question 2: Which document serves as the primary reference for the inspection, testing, and maintenance of water-based fire protection systems in the US?
- NFPA 13
- NFPA 25 (Correct answer)
- NFPA 72
- NFPA 101
Correct answer: NFPA 25
NFPA 25 is the Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems.
Question 3: A fire inspector discovers that a sprinkler head has been painted over by building maintenance staff. What is the correct action?
- Leave it if paint coverage is minimal
- Clean with solvent and reinstall
- Replace the sprinkler head immediately (Correct answer)
- Test the head with a heat gun
Correct answer: Replace the sprinkler head immediately
Painted sprinkler heads must be replaced because paint can alter the thermal response characteristics and obstruct the deflector.
Question 4: What frequency does NFPA 25 require for the inspection of wet pipe sprinkler system control valves in a supervised system?
- Weekly
- Monthly (Correct answer)
- Quarterly
- Annually
Correct answer: Monthly
NFPA 25 requires monthly inspection of control valves in supervised systems to verify they are in the open position.
Question 5: During acceptance testing of a fire alarm system, a technician performs a full-load test. Which condition must be verified?
- All notification appliances activate within 10 seconds
- Battery backup operates all devices for 24 hours in standby plus 5 minutes alarm (Correct answer)
- Panel switches to secondary power within 30 seconds of primary loss
- Smoke detectors reset automatically after alarm condition clears
Correct answer: Battery backup operates all devices for 24 hours in standby plus 5 minutes alarm
NFPA 72 requires secondary power capacity to support 24 hours of standby followed by 5 minutes of alarm for most systems.
Question 6: An inspector finds that the main drain test flow on a wet pipe sprinkler system produces a residual pressure significantly lower than previous tests. What does this most likely indicate?
- A partially closed control valve upstream (Correct answer)
- Normal seasonal pressure variation
- Sprinkler heads need replacement
- The main drain orifice is obstructed
Correct answer: A partially closed control valve upstream
A significantly lower residual pressure during main drain testing compared to historical readings typically indicates a partially closed control valve restricting water supply.
Question 7: Which of the following is NOT a required item on a sprinkler system hydraulic nameplate per NFPA 13?
- Location of the design area
- Required flow and pressure at the base of the riser
- Density of application
- Name of the installing contractor's field supervisor (Correct answer)
Correct answer: Name of the installing contractor's field supervisor
NFPA 13 requires the hydraulic nameplate to include design area location, required flow and pressure, and density, but not the field supervisor's name.
FPE Quality Control & Inspection 2
During hydrostatic testing of a sprinkler system, what is the minimum test pressure required per NFPA 13 when the system working pressure does not exceed 150 psi?