Tennessee Alarm Systems Contractor Exam
Practice Questions and ANSWERs with Rationale
for 2026
1. A technician is installing a commercial burglar alarm system in a retail building. According to general
low-voltage installation standards and common electrical safety practice, which of the following is the
MOST critical initial step before any wiring begins?
A. Installing motion detectors at all entry points
B. Verifying voltage drop across all proposed cable runs
C. Reviewing applicable codes, permits, and site plans for compliance requirements
D. Connecting the control panel to a backup battery immediately
ANSWER: C
Rationale: The most critical first step is to review applicable codes, permits, and site plans to ensure the
installation meets legal and regulatory requirements before any physical work begins, preventing
violations and redesign later.
2. In alarm system installations, which wiring method is most commonly required for fire alarm circuits
to ensure survivability during a fire condition?
,A. Non-metallic sheathed cable (NM)
B. Plenum-rated flexible cord
C. Fire-rated or power-limited fire alarm cable
D. Standard thermostat wire
ANSWER: C
Rationale: Fire alarm circuits require listed fire-rated or power-limited fire alarm cable to maintain
circuit integrity under fire conditions and comply with safety standards.
3. A burglary alarm system uses a supervised circuit. What is the PRIMARY purpose of supervision in this
context?
A. To increase signal transmission speed
B. To ensure the system detects wiring faults such as open or short circuits
C. To reduce power consumption of the panel
D. To improve sensor detection range
ANSWER: B
Rationale: Supervision ensures that wiring faults like opens or shorts are detected so the system can
report tampering or failure conditions immediately.
,4. Which code is most commonly referenced for fire alarm system installation requirements in the
United States?
A. NEC Article 300
B. NFPA 72
C. OSHA 1910
D. ANSI B31.1
ANSWER: B
Rationale: NFPA 72 governs the installation, performance, testing, and maintenance of fire alarm
systems in the United States .
5. A technician is installing a motion detector in a commercial intrusion system. What is the MOST
important factor in placement to reduce false alarms?
A. Mounting near HVAC vents for airflow detection
B. Placing the detector near a heat source to improve sensitivity
C. Avoiding placement near heat sources like HVAC vents or direct sunlight
D. Installing the detector behind large furniture for concealment
ANSWER: C
, Rationale: Motion detectors, especially PIR sensors, detect changes in infrared radiation. Placing them
near heat sources such as HVAC vents, radiators, or direct sunlight can cause false alarms .
6. According to Ohm's Law, which formula correctly represents the relationship between voltage,
current, and resistance?
A. Power = Voltage x Current
B. Voltage = Current x Resistance
C. Current = Power / Resistance
D. Resistance = Voltage + Current
ANSWER: B
Rationale: Ohm's Law states that Voltage = Current x Resistance (V = IR), defining the fundamental
relationship between these three electrical properties .
7. Which component is primarily used to rectify AC voltage to DC in alarm system power supplies?
A. Resistor
B. Capacitor
C. Diode
D. Transformer
ANSWER: C
Practice Questions and ANSWERs with Rationale
for 2026
1. A technician is installing a commercial burglar alarm system in a retail building. According to general
low-voltage installation standards and common electrical safety practice, which of the following is the
MOST critical initial step before any wiring begins?
A. Installing motion detectors at all entry points
B. Verifying voltage drop across all proposed cable runs
C. Reviewing applicable codes, permits, and site plans for compliance requirements
D. Connecting the control panel to a backup battery immediately
ANSWER: C
Rationale: The most critical first step is to review applicable codes, permits, and site plans to ensure the
installation meets legal and regulatory requirements before any physical work begins, preventing
violations and redesign later.
2. In alarm system installations, which wiring method is most commonly required for fire alarm circuits
to ensure survivability during a fire condition?
,A. Non-metallic sheathed cable (NM)
B. Plenum-rated flexible cord
C. Fire-rated or power-limited fire alarm cable
D. Standard thermostat wire
ANSWER: C
Rationale: Fire alarm circuits require listed fire-rated or power-limited fire alarm cable to maintain
circuit integrity under fire conditions and comply with safety standards.
3. A burglary alarm system uses a supervised circuit. What is the PRIMARY purpose of supervision in this
context?
A. To increase signal transmission speed
B. To ensure the system detects wiring faults such as open or short circuits
C. To reduce power consumption of the panel
D. To improve sensor detection range
ANSWER: B
Rationale: Supervision ensures that wiring faults like opens or shorts are detected so the system can
report tampering or failure conditions immediately.
,4. Which code is most commonly referenced for fire alarm system installation requirements in the
United States?
A. NEC Article 300
B. NFPA 72
C. OSHA 1910
D. ANSI B31.1
ANSWER: B
Rationale: NFPA 72 governs the installation, performance, testing, and maintenance of fire alarm
systems in the United States .
5. A technician is installing a motion detector in a commercial intrusion system. What is the MOST
important factor in placement to reduce false alarms?
A. Mounting near HVAC vents for airflow detection
B. Placing the detector near a heat source to improve sensitivity
C. Avoiding placement near heat sources like HVAC vents or direct sunlight
D. Installing the detector behind large furniture for concealment
ANSWER: C
, Rationale: Motion detectors, especially PIR sensors, detect changes in infrared radiation. Placing them
near heat sources such as HVAC vents, radiators, or direct sunlight can cause false alarms .
6. According to Ohm's Law, which formula correctly represents the relationship between voltage,
current, and resistance?
A. Power = Voltage x Current
B. Voltage = Current x Resistance
C. Current = Power / Resistance
D. Resistance = Voltage + Current
ANSWER: B
Rationale: Ohm's Law states that Voltage = Current x Resistance (V = IR), defining the fundamental
relationship between these three electrical properties .
7. Which component is primarily used to rectify AC voltage to DC in alarm system power supplies?
A. Resistor
B. Capacitor
C. Diode
D. Transformer
ANSWER: C
