NEW MEXICO (NM) ES 7J JOURNEYMAN TELEPHONE COMMUNICATION & TELEPHONE INTERCONNECT SYSTEMS EXAM QUESTIONS AND FULLY CORRECT ANSWERS (PASS GUARANTEE)

1. What is the maximum voltage permitted for Class 2 communication circuits
under NEC Article 725?
A. 100V
B. 150V
C. 60V
D. 30V
Answer: D. 30V


2. Which NEC Article primarily governs telephone and communication
circuits?
A. Article 250
B. Article 800
C. Article 310
D. Article 725
Answer: B. Article 800


3. In a plenum space, which type of cable must be used?
A. CM
B. CMP
C. CMR
D. CAT 3
Answer: B. CMP


4. The abbreviation CAT5e stands for:
A. Category 5 enhanced
B. Cable Access Type 5 extended
C. Category 5 external

,D. Cable Application Type 5 ethernet
Answer: A. Category 5 enhanced


5. What is the maximum pulling tension for a 4-pair UTP CAT6 cable?
A. 15 lbs
B. 25 lbs
C. 35 lbs
D. 50 lbs
Answer: B. 25 lbs


6. The minimum bending radius for UTP cable is typically:
A. 2 × cable diameter
B. 4 × cable diameter
C. 6 × cable diameter
D. 10 × cable diameter
Answer: B. 4 × cable diameter


7. What color code is standard for the first pair in a 25-pair cable?
A. White/Blue
B. White/Orange
C. White/Green
D. White/Brown
Answer: A. White/Blue


8. In a T568B wiring scheme, which pin is white/orange terminated on?
A. Pin 1
B. Pin 2
C. Pin 3
D. Pin 6
Answer: A. Pin 1


9. Which organization publishes telecom cabling standards like TIA/EIA-568?
A. IEEE
B. TIA
C. ANSI

,D. NFPA
Answer: B. TIA


10. A demarcation point (demarc) defines the:
A. Location of equipment grounding
B. Point between customer equipment and utility network
C. Main electrical service disconnect
D. Transition from copper to fiber
Answer: B. Point between customer equipment and utility network


11. What is the maximum distance for horizontal cabling in a structured cabling
system?
A. 90 meters
B. 100 meters
C. 80 meters
D. 120 meters
Answer: A. 90 meters


12. The additional allowance for patch cords and jumpers in structured cabling
is:
A. 2m
B. 5m
C. 10m
D. 20m
Answer: B. 5m


13. A cross-connect field where backbone and horizontal cables terminate is
known as:
A. MDF
B. IDF
C. OSP
D. NOC
Answer: B. IDF

, 14. The fire rating for riser cable is designated as:
A. CMP
B. CMX
C. CMR
D. CMG
Answer: C. CMR


15. What is the typical characteristic impedance of UTP cable used in telecom?
A. 50 ohms
B. 75 ohms
C. 100 ohms
D. 120 ohms
Answer: C. 100 ohms


16. The term “cross-talk” in telephone wiring refers to:
A. Ground loops
B. Electromagnetic interference between pairs
C. Voltage surges
D. Cable shielding
Answer: B. Electromagnetic interference between pairs


17. Which connector type is commonly used for telephone systems?
A. RJ-11
B. RJ-45
C. RJ-21
D. All of the above
Answer: D. All of the above


18. What tool is used to terminate wires on a 66 or 110 block?
A. Crimp tool
B. Punch-down tool
C. Cable stripper
D. Tone generator
Answer: B. Punch-down tool