National Electrical Code (NEC) Fire Alarm
Systems Examination Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. What is the minimum voltage rating for a fire alarm initiating device
circuit according to the NEC?
A. 12 V
B. 24 V
C. 24 V DC
D. 120 V AC
Rationale: NEC requires initiating device circuits to operate at 24 V DC
to ensure reliable low-voltage operation.
2. Which NEC article specifically covers fire alarm systems?
A. Article 725
B. Article 760
, C. Article 760
D. Article 770
Rationale: Article 760 of the NEC addresses fire alarm systems,
including circuits, devices, and installations.
3. How should a fire alarm system be grounded?
A. Only at the control panel
B. At every device
C. According to the manufacturer’s instructions and NEC grounding
requirements
D. No grounding is required
Rationale: Proper grounding is essential for system performance and
safety; NEC requires following manufacturer and grounding codes.
4. What is the maximum number of smoke detectors allowed on a single
initiating device circuit?
A. 50
B. 100
C. 32
D. 20
Rationale: NEC limits the number of detectors per circuit to prevent
voltage drop and maintain reliability.
5. Which type of wiring is generally required for fire alarm circuits?
A. NM-B
B. Listed fire alarm cable (e.g., FPL, FPLR)
, C. UF-B
D. BX
Rationale: NEC requires listed fire alarm cable (FPL/FPLR) for riser and
general circuits to ensure fire resistance and proper labeling.
6. A fire alarm control panel must be located:
A. In the basement only
B. In a readily accessible location
C. Inside an electrical closet
D. Outdoors
Rationale: NEC requires control panels to be accessible for
maintenance and emergency response.
7. What is the minimum separation distance between fire alarm cables
and power cables over 2 kV?
A. 12 inches
B. 18 inches
C. 2 inches or with metal barrier
D. No separation needed
Rationale: NEC requires separation to prevent electrical interference
with low-voltage circuits.
8. Which device initiates an alarm when smoke is detected?
A. Pull station
B. Heat detector
C. Smoke detector
, D. Siren
Rationale: Smoke detectors are designed to sense smoke and trigger
the fire alarm system.
9. The primary purpose of a fire alarm system is:
A. To extinguish fires
B. To provide power to sprinklers
C. To notify occupants and authorities of a fire
D. To monitor HVAC systems
Rationale: Fire alarm systems are life-safety systems intended to alert
occupants and emergency services.
10. What is the maximum spacing allowed for ceiling-mounted
smoke detectors in an open area?
A. 15 ft
B. 25 ft
C. 30 ft
D. 40 ft
Rationale: NEC spacing requirements ensure detectors provide
adequate coverage without leaving unmonitored areas.
11. Which type of fire alarm notification appliance produces an
audible signal only?
A. Strobe
B. Horn/Strobe
C. Horn
Systems Examination Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the minimum voltage rating for a fire alarm initiating device
circuit according to the NEC?
A. 12 V
B. 24 V
C. 24 V DC
D. 120 V AC
Rationale: NEC requires initiating device circuits to operate at 24 V DC
to ensure reliable low-voltage operation.
2. Which NEC article specifically covers fire alarm systems?
A. Article 725
B. Article 760
, C. Article 760
D. Article 770
Rationale: Article 760 of the NEC addresses fire alarm systems,
including circuits, devices, and installations.
3. How should a fire alarm system be grounded?
A. Only at the control panel
B. At every device
C. According to the manufacturer’s instructions and NEC grounding
requirements
D. No grounding is required
Rationale: Proper grounding is essential for system performance and
safety; NEC requires following manufacturer and grounding codes.
4. What is the maximum number of smoke detectors allowed on a single
initiating device circuit?
A. 50
B. 100
C. 32
D. 20
Rationale: NEC limits the number of detectors per circuit to prevent
voltage drop and maintain reliability.
5. Which type of wiring is generally required for fire alarm circuits?
A. NM-B
B. Listed fire alarm cable (e.g., FPL, FPLR)
, C. UF-B
D. BX
Rationale: NEC requires listed fire alarm cable (FPL/FPLR) for riser and
general circuits to ensure fire resistance and proper labeling.
6. A fire alarm control panel must be located:
A. In the basement only
B. In a readily accessible location
C. Inside an electrical closet
D. Outdoors
Rationale: NEC requires control panels to be accessible for
maintenance and emergency response.
7. What is the minimum separation distance between fire alarm cables
and power cables over 2 kV?
A. 12 inches
B. 18 inches
C. 2 inches or with metal barrier
D. No separation needed
Rationale: NEC requires separation to prevent electrical interference
with low-voltage circuits.
8. Which device initiates an alarm when smoke is detected?
A. Pull station
B. Heat detector
C. Smoke detector
, D. Siren
Rationale: Smoke detectors are designed to sense smoke and trigger
the fire alarm system.
9. The primary purpose of a fire alarm system is:
A. To extinguish fires
B. To provide power to sprinklers
C. To notify occupants and authorities of a fire
D. To monitor HVAC systems
Rationale: Fire alarm systems are life-safety systems intended to alert
occupants and emergency services.
10. What is the maximum spacing allowed for ceiling-mounted
smoke detectors in an open area?
A. 15 ft
B. 25 ft
C. 30 ft
D. 40 ft
Rationale: NEC spacing requirements ensure detectors provide
adequate coverage without leaving unmonitored areas.
11. Which type of fire alarm notification appliance produces an
audible signal only?
A. Strobe
B. Horn/Strobe
C. Horn
