Page 1 of 81
Virginia ESC (Electronic/Communication Service) 2026-
2027 COMPLETE 300 QUESTIONS AND VERIFIED
SOLUTIONS LATEST UPDATE THIS YEAR
1. What is the primary purpose of bonding metallic components in a communication system?
A. Improve signal speed
B. Reduce installation cost
C. Equalize electrical potential and reduce shock hazards
D. Increase wireless coverage
C. Equalize electrical potential and reduce shock hazards — bonding ensures all conductive
parts are at the same electrical potential, reducing the risk of shock and equipment damage.
2. Which grounding electrode is MOST commonly used for residential communication
systems?
A. Ground plate
B. Concrete-encased electrode (Ufer ground)
C. Ground rod
D. Water pipe only
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C. Ground rod — ground rods are widely used and accepted for residential grounding when
properly installed and bonded.
3. What is the NEC-required minimum depth for a ground rod installation?
A. 4 feet
B. 6 feet
C. 8 feet
D. 10 feet
C. 8 feet — NEC requires ground rods to be driven at least 8 feet into the earth for effective
grounding.
4. Which cable type is BEST suited for high-speed data transmission over short distances?
A. RG-59 coax
B. Cat 6 twisted pair
C. Single-mode fiber
D. Twin-lead
B. Cat 6 twisted pair — Cat 6 supports high bandwidth and low crosstalk for short-to-medium
distance data networks.
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5. What does PoE (Power over Ethernet) allow a technician to do?
A. Transmit radio signals
B. Power devices using AC outlets
C. Deliver data and DC power through the same Ethernet cable
D. Increase network encryption
C. Deliver data and DC power through the same Ethernet cable — PoE simplifies installations
for devices like IP cameras and access points.
6. Which PoE standard provides up to 90 watts of power?
A. IEEE 802.3af
B. IEEE 802.3at
C. IEEE 802.3bt
D. IEEE 802.11ax
C. IEEE 802.3bt — this standard supports high-power devices such as PTZ cameras and LED
lighting.
7. What is the primary risk of improper grounding in communication systems?
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A. Reduced bandwidth
B. Overheating cables
C. Electrical shock and equipment damage
D. Slower installation time
C. Electrical shock and equipment damage — improper grounding increases lightning, surge,
and fault risks.
8. Which device protects communication equipment from voltage surges caused by lightning?
A. Patch panel
B. UPS
C. Surge protection device (SPD)
D. Network switch
C. Surge protection device (SPD) — SPDs divert excessive voltage safely to ground.
9. What does TIA/EIA-568 primarily govern?
A. Fire alarm placement
B. Structured cabling standards
C. Wireless encryption
D. Power distribution
Virginia ESC (Electronic/Communication Service) 2026-
2027 COMPLETE 300 QUESTIONS AND VERIFIED
SOLUTIONS LATEST UPDATE THIS YEAR
1. What is the primary purpose of bonding metallic components in a communication system?
A. Improve signal speed
B. Reduce installation cost
C. Equalize electrical potential and reduce shock hazards
D. Increase wireless coverage
C. Equalize electrical potential and reduce shock hazards — bonding ensures all conductive
parts are at the same electrical potential, reducing the risk of shock and equipment damage.
2. Which grounding electrode is MOST commonly used for residential communication
systems?
A. Ground plate
B. Concrete-encased electrode (Ufer ground)
C. Ground rod
D. Water pipe only
,Page 2 of 81
C. Ground rod — ground rods are widely used and accepted for residential grounding when
properly installed and bonded.
3. What is the NEC-required minimum depth for a ground rod installation?
A. 4 feet
B. 6 feet
C. 8 feet
D. 10 feet
C. 8 feet — NEC requires ground rods to be driven at least 8 feet into the earth for effective
grounding.
4. Which cable type is BEST suited for high-speed data transmission over short distances?
A. RG-59 coax
B. Cat 6 twisted pair
C. Single-mode fiber
D. Twin-lead
B. Cat 6 twisted pair — Cat 6 supports high bandwidth and low crosstalk for short-to-medium
distance data networks.
,Page 3 of 81
5. What does PoE (Power over Ethernet) allow a technician to do?
A. Transmit radio signals
B. Power devices using AC outlets
C. Deliver data and DC power through the same Ethernet cable
D. Increase network encryption
C. Deliver data and DC power through the same Ethernet cable — PoE simplifies installations
for devices like IP cameras and access points.
6. Which PoE standard provides up to 90 watts of power?
A. IEEE 802.3af
B. IEEE 802.3at
C. IEEE 802.3bt
D. IEEE 802.11ax
C. IEEE 802.3bt — this standard supports high-power devices such as PTZ cameras and LED
lighting.
7. What is the primary risk of improper grounding in communication systems?
, Page 4 of 81
A. Reduced bandwidth
B. Overheating cables
C. Electrical shock and equipment damage
D. Slower installation time
C. Electrical shock and equipment damage — improper grounding increases lightning, surge,
and fault risks.
8. Which device protects communication equipment from voltage surges caused by lightning?
A. Patch panel
B. UPS
C. Surge protection device (SPD)
D. Network switch
C. Surge protection device (SPD) — SPDs divert excessive voltage safely to ground.
9. What does TIA/EIA-568 primarily govern?
A. Fire alarm placement
B. Structured cabling standards
C. Wireless encryption
D. Power distribution
