AZ L-58 Communication Systems
Contractor Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2027 Q&A | Instant
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1. What is the primary purpose of a communication systems contractor
classification?
A. To install high-voltage utility transmission lines
B. To install, service, and repair specified low-voltage communication and
signaling systems
C. To construct concrete foundations
D. To install natural-gas piping
Answer: B.
Rationale: The communication systems classification is intended for
specified low-voltage systems such as alarms, telephone, sound,
,intercommunication, public addressing, television/video, and signaling
systems.
2. Which Arizona classification covers Low Voltage Communication
Systems?
A. C-38
B. C-58
C. C-67
D. C-74
Answer: C.
Rationale: C-67 is Arizona's commercial classification for Low Voltage
Communication Systems.
3. Which system is specifically included within the C-67 scope?
A. Telephone systems
B. High-voltage substations
C. Natural-gas distribution
D. Structural steel erection
Answer: A.
,Rationale: Telephone systems are expressly included within the C-67 Low
Voltage Communication Systems scope.
4. Which of the following is an example of a low-voltage signaling system?
A. A 13.8-kV feeder
B. A doorbell or similar signaling circuit
C. A 480-V motor starter
D. A utility transformer primary
Answer: B.
Rationale: Low-voltage signaling systems communicate status or provide
notification without operating as conventional high-voltage power
systems.
5. What is the main function of a telecommunications cable's conductor?
A. To provide mechanical anchorage only
B. To carry electrical signals
C. To eliminate grounding requirements
D. To prevent all electromagnetic fields
Answer: B.
, Rationale: Conductors provide the electrical path through which
communication signals travel.
6. Which cable type transmits information using pulses of light?
A. Coaxial cable
B. Twisted-pair copper
C. Fiber-optic cable
D. Thermostat cable
Answer: C.
Rationale: Fiber-optic cable transmits information through optical signals
rather than electrical current.
7. What is a major advantage of fiber-optic cable?
A. It is highly susceptible to electromagnetic interference
B. It can provide high bandwidth and immunity to electromagnetic
interference
C. It requires a metallic conductor for every data channel
D. It cannot be used for long-distance communication
Answer: B.
Contractor Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2027 Q&A | Instant
Download Pdf
1. What is the primary purpose of a communication systems contractor
classification?
A. To install high-voltage utility transmission lines
B. To install, service, and repair specified low-voltage communication and
signaling systems
C. To construct concrete foundations
D. To install natural-gas piping
Answer: B.
Rationale: The communication systems classification is intended for
specified low-voltage systems such as alarms, telephone, sound,
,intercommunication, public addressing, television/video, and signaling
systems.
2. Which Arizona classification covers Low Voltage Communication
Systems?
A. C-38
B. C-58
C. C-67
D. C-74
Answer: C.
Rationale: C-67 is Arizona's commercial classification for Low Voltage
Communication Systems.
3. Which system is specifically included within the C-67 scope?
A. Telephone systems
B. High-voltage substations
C. Natural-gas distribution
D. Structural steel erection
Answer: A.
,Rationale: Telephone systems are expressly included within the C-67 Low
Voltage Communication Systems scope.
4. Which of the following is an example of a low-voltage signaling system?
A. A 13.8-kV feeder
B. A doorbell or similar signaling circuit
C. A 480-V motor starter
D. A utility transformer primary
Answer: B.
Rationale: Low-voltage signaling systems communicate status or provide
notification without operating as conventional high-voltage power
systems.
5. What is the main function of a telecommunications cable's conductor?
A. To provide mechanical anchorage only
B. To carry electrical signals
C. To eliminate grounding requirements
D. To prevent all electromagnetic fields
Answer: B.
, Rationale: Conductors provide the electrical path through which
communication signals travel.
6. Which cable type transmits information using pulses of light?
A. Coaxial cable
B. Twisted-pair copper
C. Fiber-optic cable
D. Thermostat cable
Answer: C.
Rationale: Fiber-optic cable transmits information through optical signals
rather than electrical current.
7. What is a major advantage of fiber-optic cable?
A. It is highly susceptible to electromagnetic interference
B. It can provide high bandwidth and immunity to electromagnetic
interference
C. It requires a metallic conductor for every data channel
D. It cannot be used for long-distance communication
Answer: B.
