AR TC Telecommunications Contractor
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
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Q1. What is the primary purpose of a telecommunications cable pathway?
A. To increase signal voltage
B. To provide a protected route for telecommunications cabling
C. To eliminate the need for grounding
D. To replace cable testing
Answer: B. To provide a protected route for telecommunications cabling
Rationale: A properly designed pathway protects cables, maintains
routing, supports future additions, and helps prevent physical damage to
the telecommunications installation.
,Q2. Which type of cable is generally least susceptible to electromagnetic
interference?
A. Unshielded twisted-pair copper
B. Coaxial copper
C. Fiber-optic cable
D. Shielded twisted-pair copper
Answer: C. Fiber-optic cable
Rationale: Fiber-optic cable transmits information using light rather than
electrical current, making it inherently resistant to electromagnetic
interference.
Q3. What is the main function of twisting pairs in balanced copper
telecommunications cable?
A. Increase cable weight
B. Reduce crosstalk and electromagnetic interference
C. Increase conductor diameter
D. Eliminate the need for connectors
Answer: B. Reduce crosstalk and electromagnetic interference
Rationale: Twisting the conductors helps maintain balanced
electromagnetic fields and reduces interference between pairs and from
external sources.
,Q4. Which connector is commonly associated with Ethernet twisted-pair
patch cables?
A. RJ45-style 8P8C connector
B. F-type connector
C. BNC connector
D. ST connector
Answer: A. RJ45-style 8P8C connector
Rationale: Ethernet patch cords commonly use an 8P8C modular connector,
commonly called an RJ45 connector.
Q5. What is crosstalk?
A. Signal transmission through fiber
B. Unwanted interference between adjacent communication circuits
C. Electrical grounding of a rack
D. Physical damage to a cable jacket
Answer: B. Unwanted interference between adjacent communication
circuits
Rationale: Crosstalk occurs when signals from one circuit couple into
another circuit, potentially degrading telecommunications performance.
, Q6. What is the purpose of a telecommunications grounding and bonding
system?
A. Increase Internet speed
B. Provide a path for unwanted electrical current and help protect
equipment and personnel
C. Eliminate cable attenuation
D. Replace circuit breakers
Answer: B. Provide a path for unwanted electrical current and help protect
equipment and personnel
Rationale: Proper grounding and bonding help establish an effective fault
and surge-current path while maintaining telecommunications bonding
infrastructure at an appropriate potential.
Q7. Which tool is commonly used to terminate twisted-pair cable on a 110-
style terminal block?
A. Hammer drill
B. Punch-down tool
C. Pipe wrench
D. Torque multiplier
Answer: B. Punch-down tool
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
Q1. What is the primary purpose of a telecommunications cable pathway?
A. To increase signal voltage
B. To provide a protected route for telecommunications cabling
C. To eliminate the need for grounding
D. To replace cable testing
Answer: B. To provide a protected route for telecommunications cabling
Rationale: A properly designed pathway protects cables, maintains
routing, supports future additions, and helps prevent physical damage to
the telecommunications installation.
,Q2. Which type of cable is generally least susceptible to electromagnetic
interference?
A. Unshielded twisted-pair copper
B. Coaxial copper
C. Fiber-optic cable
D. Shielded twisted-pair copper
Answer: C. Fiber-optic cable
Rationale: Fiber-optic cable transmits information using light rather than
electrical current, making it inherently resistant to electromagnetic
interference.
Q3. What is the main function of twisting pairs in balanced copper
telecommunications cable?
A. Increase cable weight
B. Reduce crosstalk and electromagnetic interference
C. Increase conductor diameter
D. Eliminate the need for connectors
Answer: B. Reduce crosstalk and electromagnetic interference
Rationale: Twisting the conductors helps maintain balanced
electromagnetic fields and reduces interference between pairs and from
external sources.
,Q4. Which connector is commonly associated with Ethernet twisted-pair
patch cables?
A. RJ45-style 8P8C connector
B. F-type connector
C. BNC connector
D. ST connector
Answer: A. RJ45-style 8P8C connector
Rationale: Ethernet patch cords commonly use an 8P8C modular connector,
commonly called an RJ45 connector.
Q5. What is crosstalk?
A. Signal transmission through fiber
B. Unwanted interference between adjacent communication circuits
C. Electrical grounding of a rack
D. Physical damage to a cable jacket
Answer: B. Unwanted interference between adjacent communication
circuits
Rationale: Crosstalk occurs when signals from one circuit couple into
another circuit, potentially degrading telecommunications performance.
, Q6. What is the purpose of a telecommunications grounding and bonding
system?
A. Increase Internet speed
B. Provide a path for unwanted electrical current and help protect
equipment and personnel
C. Eliminate cable attenuation
D. Replace circuit breakers
Answer: B. Provide a path for unwanted electrical current and help protect
equipment and personnel
Rationale: Proper grounding and bonding help establish an effective fault
and surge-current path while maintaining telecommunications bonding
infrastructure at an appropriate potential.
Q7. Which tool is commonly used to terminate twisted-pair cable on a 110-
style terminal block?
A. Hammer drill
B. Punch-down tool
C. Pipe wrench
D. Torque multiplier
Answer: B. Punch-down tool
