NICET Fire Alarm Systems Level II Exam
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which NFPA standard primarily governs the installation of fire
alarm systems?
A. NFPA 25
B. NFPA 90A
C. NFPA 72
D. NFPA 70
Answer: C
NFPA 72 is the National Fire Alarm and Signaling Code.
2. A smoke detector must generally be located a minimum of how
many inches from an air supply diffuser?
A. 3 in.
B. 12 in.
C. 36 in.
D. 48 in.
Answer: C
NFPA 72 requires smoke detectors be at least 36 inches from
supply air diffusers to avoid dilution.
3. What type of circuit configuration allows continued operation
even if one device fails or is removed?
, A. Class A
B. Class B
C. Class D
D. Class X
Answer: A
Class A circuits have redundant paths to maintain operation when
a single open occurs.
4. A NAC (Notification Appliance Circuit) typically operates at which
voltage in fire alarm systems?
A. 5 VDC
B. 12 VDC
C. 24 VDC
D. 48 VDC
Answer: C
Most modern NACs use 24 VDC for horns, strobes, and other
appliances.
5. Heat detectors spaced at 30 ft on smooth ceilings must be derated
when?
A. Ceiling height is under 10 ft
B. Ceiling height exceeds 10 ft
C. The room contains smoke detection
D. Sprinklers are present
Answer: B
Higher ceilings require reduced spacing due to heat stratification.
6. A waterflow switch must activate an alarm within how many
seconds of sustained flow?
A. 3–5 seconds
, B. 15–45 seconds
C. 30–60 seconds
D. 60–90 seconds
Answer: B
Typical retard settings are 15–45 seconds to avoid false trips.
7. A strobe light in a sleeping area must have a minimum candela
rating of:
A. 15 cd
B. 30 cd
C. 75 cd
D. 110 cd
Answer: D
Sleeping areas require 110 cd strobes to ensure wake-up
capability.
8. Fire alarm cables installed in plenum spaces must be rated:
A. NPL
B. FPLR
C. FPLP
D. FPL
Answer: C
Plenum-rated cable is FPLP.
9. What condition occurs if a fire alarm panel detects a short on a
Class B IDC?
A. Trouble
B. Supervisory
C. Alarm
D. No change
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which NFPA standard primarily governs the installation of fire
alarm systems?
A. NFPA 25
B. NFPA 90A
C. NFPA 72
D. NFPA 70
Answer: C
NFPA 72 is the National Fire Alarm and Signaling Code.
2. A smoke detector must generally be located a minimum of how
many inches from an air supply diffuser?
A. 3 in.
B. 12 in.
C. 36 in.
D. 48 in.
Answer: C
NFPA 72 requires smoke detectors be at least 36 inches from
supply air diffusers to avoid dilution.
3. What type of circuit configuration allows continued operation
even if one device fails or is removed?
, A. Class A
B. Class B
C. Class D
D. Class X
Answer: A
Class A circuits have redundant paths to maintain operation when
a single open occurs.
4. A NAC (Notification Appliance Circuit) typically operates at which
voltage in fire alarm systems?
A. 5 VDC
B. 12 VDC
C. 24 VDC
D. 48 VDC
Answer: C
Most modern NACs use 24 VDC for horns, strobes, and other
appliances.
5. Heat detectors spaced at 30 ft on smooth ceilings must be derated
when?
A. Ceiling height is under 10 ft
B. Ceiling height exceeds 10 ft
C. The room contains smoke detection
D. Sprinklers are present
Answer: B
Higher ceilings require reduced spacing due to heat stratification.
6. A waterflow switch must activate an alarm within how many
seconds of sustained flow?
A. 3–5 seconds
, B. 15–45 seconds
C. 30–60 seconds
D. 60–90 seconds
Answer: B
Typical retard settings are 15–45 seconds to avoid false trips.
7. A strobe light in a sleeping area must have a minimum candela
rating of:
A. 15 cd
B. 30 cd
C. 75 cd
D. 110 cd
Answer: D
Sleeping areas require 110 cd strobes to ensure wake-up
capability.
8. Fire alarm cables installed in plenum spaces must be rated:
A. NPL
B. FPLR
C. FPLP
D. FPL
Answer: C
Plenum-rated cable is FPLP.
9. What condition occurs if a fire alarm panel detects a short on a
Class B IDC?
A. Trouble
B. Supervisory
C. Alarm
D. No change
