100+ Free AZ Low Voltage Contractor Practice Questions

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What is an end-of-line (EOL) resistor used for in a fire alarm initiating device circuit?

To reduce voltage to devices

To provide circuit supervision by maintaining a known current flow

To increase signal strength

To filter noise on the circuit

to track

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Free Low Voltage Contractor Practice Test by State 2026: 2,800+ Questions25 min read

2026 Statistics

Key Facts: AZ Low Voltage Contractor Exam

70%

Passing Score

State Board

100 Q

Practice Questions

OpenExamPrep

2 hrs

Exam Time

State Board

C-12/L-67

License Classes

AZ ROC

NEC 725/760

Key Code Sections

NFPA

Arizona licenses low voltage contractors under the C-12 (Low Voltage Communication Systems) and L-67 classifications through the Registrar of Contractors. The exam covers NEC low voltage codes, fire alarm systems, security installations, and Arizona-specific licensing law.

Sample AZ Low Voltage Contractor Practice Questions

Try these sample questions to test your AZ Low Voltage Contractor exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which Arizona state agency issues the C-12 Low Voltage Communication Systems license?

A.Arizona Department of Real Estate

B.Arizona Registrar of Contractors (ROC)

C.Arizona Corporation Commission

D.Arizona Department of Administration

Explanation: The Arizona Registrar of Contractors (ROC) issues the C-12 Low Voltage Communication Systems license. The ROC regulates the construction industry in Arizona, processing license applications, investigating complaints, and enforcing contractor licensing laws.

2What is the Arizona C-12 license classification specifically for?

A.General electrical work

B.Low Voltage Communication Systems

C.Plumbing systems

D.HVAC systems

Explanation: The Arizona C-12 classification covers Low Voltage Communication Systems. This license allows contractors to install, alter, and repair low voltage systems including fire alarms, security systems, structured cabling, audio/video systems, and other communication systems operating at low voltage levels.

3What is the difference between the Arizona C-12 and L-67 license classifications?

A.C-12 is commercial only; L-67 is residential only

B.C-12 covers communication systems; L-67 is a limited residential low voltage classification

C.They are identical licenses

D.C-12 is for new construction; L-67 is for remodeling

Explanation: The C-12 license covers Low Voltage Communication Systems for commercial and residential projects without limitation. The L-67 is a limited residential classification. Both are issued by the Arizona Registrar of Contractors, but the L-67 has scope limitations for residential low voltage work.

4Under NEC Article 725, what are the three classifications of remote-control, signaling, and power-limited circuits?

A.Type A, Type B, Type C

B.Class 1, Class 2, Class 3

C.Level 1, Level 2, Level 3

D.Grade 1, Grade 2, Grade 3

Explanation: NEC Article 725 classifies remote-control, signaling, and power-limited circuits into Class 1, Class 2, and Class 3. Class 1 circuits can operate up to 600V and follow standard wiring methods. Class 2 and Class 3 circuits are power-limited and have reduced installation requirements due to their inherent safety.

5What NEC article governs the installation of fire alarm system wiring?

A.Article 700

B.Article 725

C.Article 760

D.Article 800

Explanation: NEC Article 760 covers fire alarm system wiring, including both power-limited fire alarm (PLFA) and non-power-limited fire alarm (NPLFA) circuits. This article addresses cable types, installation methods, separation requirements, and other provisions specific to fire alarm system wiring.

6In Arizona, what bonding requirement applies to contractors holding a C-12 license?

A.No bond required

B.A surety bond is required as determined by the ROC

C.Only a cash deposit is accepted

D.Bonding is only required for projects over $100,000

Explanation: Arizona requires C-12 licensed contractors to maintain a surety bond as determined by the Registrar of Contractors. The bond amount is based on the contractor's volume of work and provides financial protection for consumers. Failure to maintain the required bond can result in license suspension.

7What is the maximum voltage for a Class 2 power source per NEC Article 725?

A.30 volts

B.60 volts

C.100 volts

D.150 volts

Explanation: Class 2 power sources are limited to a maximum of 100 volts per NEC Chapter 9, Table 11(A). However, the current and power are also limited. Most practical Class 2 applications use 12V or 24V DC power supplies. The power limitation allows simplified wiring methods for these circuits.

8Which type of cable must be used for installations in plenum air-handling spaces?

A.CM rated cable

B.CMR riser rated cable

C.CMP plenum rated cable

D.CMX limited use cable

Explanation: CMP (Communications Plenum) rated cable must be used in plenum air-handling spaces. Plenum cable has fire-resistant and low-smoke properties that minimize toxic fume production if the cable burns. Using non-plenum cable in these spaces violates the NEC and building codes.

9What is an end-of-line (EOL) resistor used for in a fire alarm initiating device circuit?

A.To increase signal strength

B.To provide circuit supervision by maintaining a known current flow

C.To reduce voltage to devices

D.To filter noise on the circuit

Explanation: An EOL resistor is placed at the last device on a fire alarm initiating device circuit to provide supervision. The fire alarm control panel monitors the steady-state current through the resistor. An open circuit (broken wire) causes loss of current, and a short circuit causes excess current — both generate a trouble condition on the panel.

10What is the maximum horizontal cable run length per TIA-568 standards?

A.50 meters

B.75 meters

C.90 meters

D.100 meters

Explanation: TIA-568 specifies a maximum horizontal cable run of 90 meters from the telecommunications room to the work area outlet. The remaining 10 meters of the 100-meter total channel is allocated for patch cords and equipment cords at both ends. This distance limitation applies to all categories of UTP copper cable.

About the AZ Low Voltage Contractor Exam

The Arizona low voltage contractor exam covers state licensing requirements for C-12 and L-67 license classifications, NEC Articles 725/760/770/800, fire alarm systems, security systems, structured cabling, and installation safety practices.

Questions

100 scored questions

Time Limit

2 hours

Passing Score

70%

Exam Fee

$300 (Arizona Registrar of Contractors)

AZ Low Voltage Contractor Exam Content Outline

25%

NEC Codes & Standards

NEC Articles 725, 760, 770, 800, low voltage circuit classifications, wiring methods

25%

Fire Alarm & Security Systems

Fire alarm circuits, notification appliances, detection devices, security system installation

20%

Installation & Wiring

Structured cabling, network infrastructure, telecommunications, cable types and ratings

15%

Testing & Troubleshooting

System testing, cable certification, troubleshooting techniques, documentation

15%

Arizona Licensing & Regulations

Arizona ROC licensing law, C-12 and L-67 classifications, permit requirements, contractor responsibilities

How to Pass the AZ Low Voltage Contractor Exam

What You Need to Know

Passing score: 70%
Exam length: 100 questions
Time limit: 2 hours
Exam fee: $300

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

AZ Low Voltage Contractor Study Tips from Top Performers

1Master NEC Article 725 classifications — Class 1, 2, and 3 circuits are heavily tested

2Study the differences between Arizona C-12 and L-67 license classifications

3Know Arizona Registrar of Contractors (ROC) requirements and regulations

4Review fire alarm system requirements including NFPA 72 standards

5Practice cable testing procedures and understand TIA-568 certification requirements

Frequently Asked Questions

What does the Arizona low voltage contractor exam cover?

The exam covers NEC Articles 725, 760, 770, and 800 for low voltage systems, fire alarm installation, security systems, structured cabling, testing procedures, and Arizona-specific C-12 and L-67 licensing requirements.

What is the difference between Arizona C-12 and L-67 licenses?

The C-12 license covers Low Voltage Communication Systems for commercial projects, while the L-67 is a limited residential classification. Both are issued by the Arizona Registrar of Contractors (ROC).

What is the passing score for the AZ low voltage exam?

A minimum score of 70% is required to pass the Arizona low voltage contractor licensing exam.

What systems can an Arizona low voltage contractor install?

Licensed C-12/L-67 contractors in Arizona can install fire alarm systems, security and intrusion detection, access control, CCTV, structured cabling, audio/video systems, and other low voltage communication systems.