Low Voltage Systems Technician Certification
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. Which of the following is the primary purpose of a low voltage
system?
a) To supply power for industrial machinery
b) To transmit high voltage electricity over long distances
c) To control, monitor, or communicate using minimal electrical
energy
d) To replace residential electrical wiring
Low voltage systems operate at reduced voltages to safely
manage control, communication, and monitoring tasks rather
than power heavy loads.
2. What is the typical voltage range considered “low voltage” in
building systems?
a) 0–120 V
b) 50–150 V
c) 600–1000 V
d) 120–480 V
Low voltage systems generally operate below 150 volts for safety
and functional purposes, such as alarms, access control, and
communication circuits.
3. Which of the following devices is commonly part of a low voltage
security system?
, a) Circuit breaker
b) Generator
c) Motion detector
d) Transformer
Motion detectors are standard components in low voltage security
systems for sensing movement and triggering alarms.
4. What type of wiring is most often used for low voltage data
communication?
a) Coaxial
b) Twisted pair
c) THHN
d) MC cable
Twisted pair wiring, such as CAT5e or CAT6, reduces
electromagnetic interference and is widely used in low voltage
networking.
5. In a fire alarm system, which component detects smoke?
a) Heat sensor
b) Manual pull station
c) Smoke detector
d) Siren
Smoke detectors sense particles from combustion and send a
signal to the alarm panel in low voltage fire systems.
6. Which standard governs commercial low voltage cabling
installations?
a) NFPA 70E
b) OSHA 1910
c) ANSI/TIA-568
, d) NEC Article 310
ANSI/TIA-568 specifies standards for structured cabling systems
used in low voltage applications like voice and data networks.
7. What is the main function of a network switch in a low voltage
system?
a) Convert AC to DC
b) Connect multiple devices and direct data traffic
c) Protect against surges
d) Store backup data
Switches allow multiple network devices to communicate
efficiently by forwarding data only to the intended device.
8. Which tool is most appropriate for testing cable continuity in a low
voltage system?
a) Clamp meter
b) Insulation resistance tester
c) Cable tester
d) Oscilloscope
Cable testers verify continuity and correct wiring configuration in
low voltage systems like data or security cabling.
9. Which low voltage system component stores and provides backup
power?
a) Transformer
b) Circuit breaker
c) Battery
d) Resistor
Batteries provide backup power to ensure continuous operation of
low voltage systems during outages.
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which of the following is the primary purpose of a low voltage
system?
a) To supply power for industrial machinery
b) To transmit high voltage electricity over long distances
c) To control, monitor, or communicate using minimal electrical
energy
d) To replace residential electrical wiring
Low voltage systems operate at reduced voltages to safely
manage control, communication, and monitoring tasks rather
than power heavy loads.
2. What is the typical voltage range considered “low voltage” in
building systems?
a) 0–120 V
b) 50–150 V
c) 600–1000 V
d) 120–480 V
Low voltage systems generally operate below 150 volts for safety
and functional purposes, such as alarms, access control, and
communication circuits.
3. Which of the following devices is commonly part of a low voltage
security system?
, a) Circuit breaker
b) Generator
c) Motion detector
d) Transformer
Motion detectors are standard components in low voltage security
systems for sensing movement and triggering alarms.
4. What type of wiring is most often used for low voltage data
communication?
a) Coaxial
b) Twisted pair
c) THHN
d) MC cable
Twisted pair wiring, such as CAT5e or CAT6, reduces
electromagnetic interference and is widely used in low voltage
networking.
5. In a fire alarm system, which component detects smoke?
a) Heat sensor
b) Manual pull station
c) Smoke detector
d) Siren
Smoke detectors sense particles from combustion and send a
signal to the alarm panel in low voltage fire systems.
6. Which standard governs commercial low voltage cabling
installations?
a) NFPA 70E
b) OSHA 1910
c) ANSI/TIA-568
, d) NEC Article 310
ANSI/TIA-568 specifies standards for structured cabling systems
used in low voltage applications like voice and data networks.
7. What is the main function of a network switch in a low voltage
system?
a) Convert AC to DC
b) Connect multiple devices and direct data traffic
c) Protect against surges
d) Store backup data
Switches allow multiple network devices to communicate
efficiently by forwarding data only to the intended device.
8. Which tool is most appropriate for testing cable continuity in a low
voltage system?
a) Clamp meter
b) Insulation resistance tester
c) Cable tester
d) Oscilloscope
Cable testers verify continuity and correct wiring configuration in
low voltage systems like data or security cabling.
9. Which low voltage system component stores and provides backup
power?
a) Transformer
b) Circuit breaker
c) Battery
d) Resistor
Batteries provide backup power to ensure continuous operation of
low voltage systems during outages.
