MAINE LIMITED ELECTRICIAN – LOW ENERGY & FIRE
ALARMS QUESTIONS FORM A REAL EXAM LATEST 2026-
2027 UPDATE WITH 100 QUESTIONS & 100% CORRECT
DETAILED ANSWERS GRADED A+ (BRAND NEW!!)
1. Low-energy systems generally operate at which maximum voltage according
to the NEC?
A. 30 volts
B. 50 volts
C. 100 volts
D. 600 volts
Explanation: Low-energy and power-limited circuits are typically defined as
operating at 100 volts or less.
2. Which NEC Article specifically covers fire alarm systems?
A. Article 725
B. Article 760
C. Article 800
D. Article 300
Explanation: NEC Article 760 governs installation of fire alarm systems.
3. Which class of circuit limits both voltage and power and does not require
conduit in all locations?
A. Class 1
B. Class 2
, C. Class 3
D. Non–power-limited
Explanation: Class 2 circuits are power-limited and have relaxed wiring methods.
4. Fire alarm initiating device circuits (IDCs) are primarily used to:
A. Power notification appliances
B. Transmit alarm signals from detectors or pull stations
C. Supply control power
D. Activate suppression systems
Explanation: IDCs carry signals from initiating devices to the control panel.
5. According to NFPA 72, fire alarm system documentation must be retained
for a minimum of:
A. 1 year
B. 3 years
C. Life of the system
D. 10 years
Explanation: NFPA 72 requires records to be retained for the life of the system.
6. Which device is classified as an initiating device?
A. Horn
B. Strobe
C. Smoke detector
D. Power supply
Explanation: Smoke detectors initiate an alarm condition.
7. What color is typically required for fire alarm circuit conductors?
A. Green
, B. White
C. Red
D. Blue
Explanation: Red is the standard color for fire alarm wiring.
8. A Class A fire alarm circuit differs from Class B because it:
A. Uses less wire
B. Has lower voltage
C. Provides a return path for continuity if the circuit is broken
D. Cannot support addressable devices
Explanation: Class A circuits maintain operation with a single break.
9. Which type of fire alarm system allows individual device identification?
A. Conventional
B. Zoned
C. Addressable
D. Local
Explanation: Addressable systems identify each device by a unique address.
10.What is the minimum mounting height for a manual pull station?
A. 24 inches
B. 36 inches
C. 42 inches
D. 60 inches
Explanation: NFPA 72 requires pull stations to be mounted between 42–48 inches.
11.Which NEC Article covers Class 2 and Class 3 circuits?
A. 760
ALARMS QUESTIONS FORM A REAL EXAM LATEST 2026-
2027 UPDATE WITH 100 QUESTIONS & 100% CORRECT
DETAILED ANSWERS GRADED A+ (BRAND NEW!!)
1. Low-energy systems generally operate at which maximum voltage according
to the NEC?
A. 30 volts
B. 50 volts
C. 100 volts
D. 600 volts
Explanation: Low-energy and power-limited circuits are typically defined as
operating at 100 volts or less.
2. Which NEC Article specifically covers fire alarm systems?
A. Article 725
B. Article 760
C. Article 800
D. Article 300
Explanation: NEC Article 760 governs installation of fire alarm systems.
3. Which class of circuit limits both voltage and power and does not require
conduit in all locations?
A. Class 1
B. Class 2
, C. Class 3
D. Non–power-limited
Explanation: Class 2 circuits are power-limited and have relaxed wiring methods.
4. Fire alarm initiating device circuits (IDCs) are primarily used to:
A. Power notification appliances
B. Transmit alarm signals from detectors or pull stations
C. Supply control power
D. Activate suppression systems
Explanation: IDCs carry signals from initiating devices to the control panel.
5. According to NFPA 72, fire alarm system documentation must be retained
for a minimum of:
A. 1 year
B. 3 years
C. Life of the system
D. 10 years
Explanation: NFPA 72 requires records to be retained for the life of the system.
6. Which device is classified as an initiating device?
A. Horn
B. Strobe
C. Smoke detector
D. Power supply
Explanation: Smoke detectors initiate an alarm condition.
7. What color is typically required for fire alarm circuit conductors?
A. Green
, B. White
C. Red
D. Blue
Explanation: Red is the standard color for fire alarm wiring.
8. A Class A fire alarm circuit differs from Class B because it:
A. Uses less wire
B. Has lower voltage
C. Provides a return path for continuity if the circuit is broken
D. Cannot support addressable devices
Explanation: Class A circuits maintain operation with a single break.
9. Which type of fire alarm system allows individual device identification?
A. Conventional
B. Zoned
C. Addressable
D. Local
Explanation: Addressable systems identify each device by a unique address.
10.What is the minimum mounting height for a manual pull station?
A. 24 inches
B. 36 inches
C. 42 inches
D. 60 inches
Explanation: NFPA 72 requires pull stations to be mounted between 42–48 inches.
11.Which NEC Article covers Class 2 and Class 3 circuits?
A. 760
