AZ L-70 FIRE ALARM SYSTEMS
CONTRACTOR EXAM Questions And
Correct Answers (Verified Answers) Plus
Rationale2026 Q&A| Instant Download
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1. What is the primary code governing commercial fire alarm system
installation in the United States?
A. NEC Article 450
B. IFC Chapter 5
C. NFPA 72
D. UL 300
Rationale: NFPA 72 is the National Fire Alarm and Signaling Code
governing design, installation, and maintenance.
2. What type of circuit supervises wiring for opens and ground faults?
A. Class A power circuits
B. Class B initiating device circuits
C. Class C data circuits
D. Class N network circuits
Rationale: Class B IDC circuits provide supervision for opens and shorts
but do not return on a redundant path.
,3. A Class A fire alarm circuit must:
A. Be installed without end-of-line devices
B. Return to the control panel on a separate path
C. Use only shielded cable
D. Be run in metallic raceway only
Rationale: Class A circuits loop back to the panel, maintaining operation
even with a single break.
4. Smoke detectors must not be installed within how many feet of a
cooking appliance?
A. 1 ft
B. 5 ft
C. 10 ft
D. 20 ft
Rationale: NFPA 72 requires smoke detectors be placed at least 10 feet
from cooking appliances to avoid nuisance alarms.
5. Which detector is best for detecting fast flaming fires?
A. Heat detector
B. Photoelectric smoke detector
C. Spot-type heat detector
D. Sprinkler flow detector
Rationale: Photoelectric detectors respond well to small particle smoke
from fast flaming fires.
6. Which device uses a light beam projected across a large area?
A. Ionization detector
B. Multi-criteria detector
C. Beam smoke detector
, D. Aspirating detector
Rationale: Beam detectors use projected light across open spaces like
warehouses.
7. Fire alarm control panels must be listed to which standard?
A. UL 94
B. UL 864A
C. UL 864
D. UL 521
Rationale: UL 864 is the listing standard for fire alarm control units.
8. A manual pull station must be mounted between what heights?
A. 24–42 inches
B. 42–48 inches
C. 48–60 inches
D. 60–72 inches
Rationale: NFPA 72 requires pull stations at 42–48 inches above finished
floor.
9. What is the required minimum sound level for audible fire alarm
signals in normally occupied areas?
A. 60 dBA
B. 70 dBA
C. 15 dBA above ambient
D. 30 dBA above ambient
Rationale: Must be 15 dBA above average ambient noise.
CONTRACTOR EXAM Questions And
Correct Answers (Verified Answers) Plus
Rationale2026 Q&A| Instant Download
1. What is the primary code governing commercial fire alarm system
installation in the United States?
A. NEC Article 450
B. IFC Chapter 5
C. NFPA 72
D. UL 300
Rationale: NFPA 72 is the National Fire Alarm and Signaling Code
governing design, installation, and maintenance.
2. What type of circuit supervises wiring for opens and ground faults?
A. Class A power circuits
B. Class B initiating device circuits
C. Class C data circuits
D. Class N network circuits
Rationale: Class B IDC circuits provide supervision for opens and shorts
but do not return on a redundant path.
,3. A Class A fire alarm circuit must:
A. Be installed without end-of-line devices
B. Return to the control panel on a separate path
C. Use only shielded cable
D. Be run in metallic raceway only
Rationale: Class A circuits loop back to the panel, maintaining operation
even with a single break.
4. Smoke detectors must not be installed within how many feet of a
cooking appliance?
A. 1 ft
B. 5 ft
C. 10 ft
D. 20 ft
Rationale: NFPA 72 requires smoke detectors be placed at least 10 feet
from cooking appliances to avoid nuisance alarms.
5. Which detector is best for detecting fast flaming fires?
A. Heat detector
B. Photoelectric smoke detector
C. Spot-type heat detector
D. Sprinkler flow detector
Rationale: Photoelectric detectors respond well to small particle smoke
from fast flaming fires.
6. Which device uses a light beam projected across a large area?
A. Ionization detector
B. Multi-criteria detector
C. Beam smoke detector
, D. Aspirating detector
Rationale: Beam detectors use projected light across open spaces like
warehouses.
7. Fire alarm control panels must be listed to which standard?
A. UL 94
B. UL 864A
C. UL 864
D. UL 521
Rationale: UL 864 is the listing standard for fire alarm control units.
8. A manual pull station must be mounted between what heights?
A. 24–42 inches
B. 42–48 inches
C. 48–60 inches
D. 60–72 inches
Rationale: NFPA 72 requires pull stations at 42–48 inches above finished
floor.
9. What is the required minimum sound level for audible fire alarm
signals in normally occupied areas?
A. 60 dBA
B. 70 dBA
C. 15 dBA above ambient
D. 30 dBA above ambient
Rationale: Must be 15 dBA above average ambient noise.
