MISSISSIPPI (MS) COMMUNICATION SYSTEMS EXAMINATION:
COMPREHENSIVE EXAM QUESTIONS & DETAILED SOLUTIONS
1. What is the primary purpose of wearing safety glasses while
terminating copper communication cables?
A. To improve visual clarity
B. To protect against flying wire clippings and debris
C. To reduce glare from overhead lighting
D. To prevent eye strain from crimping tools
Answer: B
Rationale: Safety glasses are required PPE to protect the eyes from
physical hazards such as flying wire fragments and debris generated
during cutting and stripping operations.
2. According to the NEC, what is the minimum vertical clearance
required above a roof for communication cables?
A. 6 feet
B. 8 feet
C. 10 feet
D. 12 feet
Answer: B
Rationale: The National Electrical Code mandates an 8-foot vertical
clearance for communication cables above roofs to ensure safety and
prevent interference with roof maintenance.
,3. Which type of cable is most susceptible to electromagnetic
interference (EMI) from nearby power conductors?
A. Shielded Twisted Pair (STP)
B. Unshielded Twisted Pair (UTP)
C. Fiber Optic
D. Coaxial
Answer: B
Rationale: UTP lacks the shielding layer found in STP and coaxial cables,
making it highly vulnerable to electromagnetic interference from power
sources.
4. What is the maximum allowable pulling tension for a standard 4-
pair Category 6 cable?
A. 10 lbs
B. 15 lbs
C. 25 lbs
D. 30 lbs
Answer: C
Rationale: Most Category 6 cables have a maximum pulling tension of
25 pounds to prevent stretching and damaging the copper conductors
or altering the twist rate.
5. When installing communication cables, what is the recommended
minimum separation distance from unshielded power lines (under 2
kVA)?
A. 2 inches
B. 4 inches
,C. 6 inches
D. 12 inches
Answer: C
Rationale: Proper separation of at least 6 inches is generally required to
minimize electromagnetic interference and induced noise from low-
voltage power circuits.
6. Which fire-rated cable type is specifically designed for use in
plenum spaces?
A. CMP
B. CMR
C. CMG
D. CMX
Answer: A
Rationale: Plenum-rated (CMP) cables have low smoke and flame
spread characteristics, making them mandatory for installation in air-
handling spaces.
7. What is the primary function of a telecom grounding busbar (TGB)?
A. To increase signal bandwidth
B. To provide a common point for bonding communication systems
C. To step down high voltage
D. To amplify weak signals
Answer: B
Rationale: The TGB serves as the central connection point for bonding
and grounding communication cabling, equipment, and pathways to
ensure electrical safety.
, 8. During installation, a technician exceeds the minimum bend radius
of a fiber optic cable. What is the most likely result?
A. Increased signal attenuation
B. Improved data transmission
C. Higher voltage resistance
D. Decreased cable jacket temperature
Answer: A
Rationale: Exceeding the bend radius causes macrobending in fiber
optics, which leads to signal loss and increased attenuation.
9. Which tool is specifically used to verify the continuity and pinout of
a copper patch cord?
A. OTDR
B. Multimeter
C. Cable certifier
D. Wire map tester
Answer: D
Rationale: A wire map tester is specifically designed to check for opens,
shorts, and crossed pairs in copper cabling.
10. In a T568A wiring scheme, which pin is assigned to the
white/orange wire?
A. Pin 1
B. Pin 2
C. Pin 3
D. Pin 6
COMPREHENSIVE EXAM QUESTIONS & DETAILED SOLUTIONS
1. What is the primary purpose of wearing safety glasses while
terminating copper communication cables?
A. To improve visual clarity
B. To protect against flying wire clippings and debris
C. To reduce glare from overhead lighting
D. To prevent eye strain from crimping tools
Answer: B
Rationale: Safety glasses are required PPE to protect the eyes from
physical hazards such as flying wire fragments and debris generated
during cutting and stripping operations.
2. According to the NEC, what is the minimum vertical clearance
required above a roof for communication cables?
A. 6 feet
B. 8 feet
C. 10 feet
D. 12 feet
Answer: B
Rationale: The National Electrical Code mandates an 8-foot vertical
clearance for communication cables above roofs to ensure safety and
prevent interference with roof maintenance.
,3. Which type of cable is most susceptible to electromagnetic
interference (EMI) from nearby power conductors?
A. Shielded Twisted Pair (STP)
B. Unshielded Twisted Pair (UTP)
C. Fiber Optic
D. Coaxial
Answer: B
Rationale: UTP lacks the shielding layer found in STP and coaxial cables,
making it highly vulnerable to electromagnetic interference from power
sources.
4. What is the maximum allowable pulling tension for a standard 4-
pair Category 6 cable?
A. 10 lbs
B. 15 lbs
C. 25 lbs
D. 30 lbs
Answer: C
Rationale: Most Category 6 cables have a maximum pulling tension of
25 pounds to prevent stretching and damaging the copper conductors
or altering the twist rate.
5. When installing communication cables, what is the recommended
minimum separation distance from unshielded power lines (under 2
kVA)?
A. 2 inches
B. 4 inches
,C. 6 inches
D. 12 inches
Answer: C
Rationale: Proper separation of at least 6 inches is generally required to
minimize electromagnetic interference and induced noise from low-
voltage power circuits.
6. Which fire-rated cable type is specifically designed for use in
plenum spaces?
A. CMP
B. CMR
C. CMG
D. CMX
Answer: A
Rationale: Plenum-rated (CMP) cables have low smoke and flame
spread characteristics, making them mandatory for installation in air-
handling spaces.
7. What is the primary function of a telecom grounding busbar (TGB)?
A. To increase signal bandwidth
B. To provide a common point for bonding communication systems
C. To step down high voltage
D. To amplify weak signals
Answer: B
Rationale: The TGB serves as the central connection point for bonding
and grounding communication cabling, equipment, and pathways to
ensure electrical safety.
, 8. During installation, a technician exceeds the minimum bend radius
of a fiber optic cable. What is the most likely result?
A. Increased signal attenuation
B. Improved data transmission
C. Higher voltage resistance
D. Decreased cable jacket temperature
Answer: A
Rationale: Exceeding the bend radius causes macrobending in fiber
optics, which leads to signal loss and increased attenuation.
9. Which tool is specifically used to verify the continuity and pinout of
a copper patch cord?
A. OTDR
B. Multimeter
C. Cable certifier
D. Wire map tester
Answer: D
Rationale: A wire map tester is specifically designed to check for opens,
shorts, and crossed pairs in copper cabling.
10. In a T568A wiring scheme, which pin is assigned to the
white/orange wire?
A. Pin 1
B. Pin 2
C. Pin 3
D. Pin 6
