Tennessee Electrical Contractor Exam –
Telecommunications Systems Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. In a structured cabling system, which subsystem connects
telecommunications outlets to the telecommunications room on the
same floor?
A. Campus backbone cabling
B. Horizontal cabling
C. Entrance facilities
D. Equipment room cabling
Answer: B
Horizontal cabling connects individual work area outlets to the
telecommunications room on the same floor, forming the primary
pathway for end-user connectivity.
2. What is the maximum recommended length for horizontal twisted-
pair cabling in a telecommunications system according to industry
standards?
A. 50 meters
B. 75 meters
C. 90 meters
D. 120 meters
Answer: C
, Standards such as TIA/EIA specify a maximum of 90 meters for
horizontal cabling to maintain signal integrity and performance.
3. Which category of twisted-pair cable supports frequencies up to 250
MHz and is commonly used for Gigabit Ethernet?
A. Cat 3
B. Cat 5
C. Cat 5e
D. Cat 6
Answer: D
Category 6 cable supports up to 250 MHz and provides improved
performance for Gigabit Ethernet compared to lower categories.
4. What is the primary purpose of a telecommunications room (TR)?
A. To house building electrical panels
B. To store office equipment
C. To terminate and manage telecommunications cabling
D. To provide HVAC services
Answer: C
A telecommunications room serves as a centralized space for
terminating, cross-connecting, and managing telecommunications
cabling systems.
5. Which type of cable is most resistant to electromagnetic interference
(EMI)?
A. Unshielded twisted pair (UTP)
B. Shielded twisted pair (STP)
C. Coaxial cable
D. Fiber optic cable
Answer: D
Fiber optic cable uses light rather than electrical signals, making it
immune to electromagnetic interference.
6. What device is used to connect multiple network devices and forward
data based on MAC addresses?
A. Router
B. Hub
C. Switch
D. Repeater
, Answer: C
A switch operates at the data link layer and forwards frames based
on MAC addresses, improving network efficiency.
7. Which standard defines performance requirements for balanced
twisted-pair cabling?
A. IEEE 802.11
B. TIA/EIA-568
C. NEC Article 250
D. NFPA 70E
Answer: B
TIA/EIA-568 establishes specifications for structured cabling systems,
including performance requirements.
8. What is the purpose of a patch panel in a telecommunications system?
A. To amplify signals
B. To route electrical power
C. To provide a flexible connection point for cables
D. To convert analog to digital signals
Answer: C
Patch panels allow easy reconfiguration and management of
network connections without altering permanent cabling.
9. Which topology connects all devices to a central hub or switch?
A. Ring topology
B. Bus topology
C. Star topology
D. Mesh topology
Answer: C
Star topology uses a central device, making it easier to manage and
troubleshoot connections.
10. What is the main function of a router in telecommunications?
A. Amplify signals
B. Connect devices within a LAN
C. Route data between different networks
D. Store data
Answer: C
Telecommunications Systems Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. In a structured cabling system, which subsystem connects
telecommunications outlets to the telecommunications room on the
same floor?
A. Campus backbone cabling
B. Horizontal cabling
C. Entrance facilities
D. Equipment room cabling
Answer: B
Horizontal cabling connects individual work area outlets to the
telecommunications room on the same floor, forming the primary
pathway for end-user connectivity.
2. What is the maximum recommended length for horizontal twisted-
pair cabling in a telecommunications system according to industry
standards?
A. 50 meters
B. 75 meters
C. 90 meters
D. 120 meters
Answer: C
, Standards such as TIA/EIA specify a maximum of 90 meters for
horizontal cabling to maintain signal integrity and performance.
3. Which category of twisted-pair cable supports frequencies up to 250
MHz and is commonly used for Gigabit Ethernet?
A. Cat 3
B. Cat 5
C. Cat 5e
D. Cat 6
Answer: D
Category 6 cable supports up to 250 MHz and provides improved
performance for Gigabit Ethernet compared to lower categories.
4. What is the primary purpose of a telecommunications room (TR)?
A. To house building electrical panels
B. To store office equipment
C. To terminate and manage telecommunications cabling
D. To provide HVAC services
Answer: C
A telecommunications room serves as a centralized space for
terminating, cross-connecting, and managing telecommunications
cabling systems.
5. Which type of cable is most resistant to electromagnetic interference
(EMI)?
A. Unshielded twisted pair (UTP)
B. Shielded twisted pair (STP)
C. Coaxial cable
D. Fiber optic cable
Answer: D
Fiber optic cable uses light rather than electrical signals, making it
immune to electromagnetic interference.
6. What device is used to connect multiple network devices and forward
data based on MAC addresses?
A. Router
B. Hub
C. Switch
D. Repeater
, Answer: C
A switch operates at the data link layer and forwards frames based
on MAC addresses, improving network efficiency.
7. Which standard defines performance requirements for balanced
twisted-pair cabling?
A. IEEE 802.11
B. TIA/EIA-568
C. NEC Article 250
D. NFPA 70E
Answer: B
TIA/EIA-568 establishes specifications for structured cabling systems,
including performance requirements.
8. What is the purpose of a patch panel in a telecommunications system?
A. To amplify signals
B. To route electrical power
C. To provide a flexible connection point for cables
D. To convert analog to digital signals
Answer: C
Patch panels allow easy reconfiguration and management of
network connections without altering permanent cabling.
9. Which topology connects all devices to a central hub or switch?
A. Ring topology
B. Bus topology
C. Star topology
D. Mesh topology
Answer: C
Star topology uses a central device, making it easier to manage and
troubleshoot connections.
10. What is the main function of a router in telecommunications?
A. Amplify signals
B. Connect devices within a LAN
C. Route data between different networks
D. Store data
Answer: C
