1. What does a telecommunications system primarily transmit?
A. Electrical power
B. Data, voice, and video
C. Mechanical signals
D. Light only
ANSWER : B
Explanation: Telecom systems carry information such as voice, data, and
video—not power.
2. Which organization publishes the National Electrical Code (NEC)?
A. OSHA
B. IEEE
C. NFPA
D. FCC
ANSWER : C
Explanation: The NEC is published by the National Fire Protection
Association (NFPA).
3. Which NEC article covers communications circuits?
A. Article 100
B. Article 250
C. Article 725
D. Article 800
ANSWER : D
Explanation: NEC Article 800 applies to communications circuits.
4. The main purpose of grounding telecom systems is to:
,A. Improve data speed
B. Reduce signal loss
C. Protect people and equipment
D. Increase voltage
ANSWER : C
Explanation: Grounding protects against electrical faults and lightning.
5. What is the maximum typical voltage for Class 2 circuits?
A. 12V
B. 30V
C. 60V
D. 120V
ANSWER : B
Explanation: Class 2 circuits are limited to 30 volts.
6. Which tool is used to terminate twisted-pair cables?
A. Multimeter
B. Punch-down tool
C. Fish tape
D. Crimper
ANSWER : B
Explanation: Punch-down tools seat wires into insulation displacement
connectors (IDC).
7. Which color code standard is used for Ethernet wiring?
A. TIA-606
B. TIA-568
C. NEC 800
D. IEEE 802
ANSWER : B
Explanation: TIA-568 defines Ethernet wiring color codes.
8. What does PoE stand for?
,A. Power over Ethernet
B. Packet over Equipment
C. Protocol of Ethernet
D. Power on Entry
ANSWER : A
Explanation: PoE supplies electrical power over Ethernet cables.
9. Which cable type is most immune to electromagnetic interference?
A. UTP
B. STP
C. Coaxial
D. Fiber optic
ANSWER : D
Explanation: Fiber uses light, so it’s immune to EMI.
10. What OSHA regulation focuses on workplace safety?
A. NEC
B. FCC Rules
C. CFR 29
D. TIA Standards
ANSWER : C
Explanation: OSHA regulations are in 29 CFR.
11. Which device regenerates and boosts signals?
A. Router
B. Switch
C. Repeater
D. Patch panel
ANSWER : C
Explanation: Repeaters restore weakened signals.
12. What is the purpose of a patch panel?
, A. Amplify signal
B. Route power
C. Organize cable terminations
D. Ground equipment
ANSWER : C
Explanation: Patch panels manage and organize connections.
13. Which tool measures signal loss in fiber?
A. Multimeter
B. OTDR
C. Tone generator
D. Cable tracer
ANSWER : B
Explanation: OTDR analyzes fiber length and loss.
14. Which connector is used with single-mode fiber?
A. RJ-45
B. BNC
C. SC
D. F-type
ANSWER : C
Explanation: SC connectors are common in fiber systems.
15. What does EMI stand for?
A. Electrical Mode Interference
B. Electromagnetic Interference
C. Electronic Media Interface
D. Energy Management Index
ANSWER : B
Explanation: EMI disrupts electronic signals.
16. Which cable has a central conductor?
A. Electrical power
B. Data, voice, and video
C. Mechanical signals
D. Light only
ANSWER : B
Explanation: Telecom systems carry information such as voice, data, and
video—not power.
2. Which organization publishes the National Electrical Code (NEC)?
A. OSHA
B. IEEE
C. NFPA
D. FCC
ANSWER : C
Explanation: The NEC is published by the National Fire Protection
Association (NFPA).
3. Which NEC article covers communications circuits?
A. Article 100
B. Article 250
C. Article 725
D. Article 800
ANSWER : D
Explanation: NEC Article 800 applies to communications circuits.
4. The main purpose of grounding telecom systems is to:
,A. Improve data speed
B. Reduce signal loss
C. Protect people and equipment
D. Increase voltage
ANSWER : C
Explanation: Grounding protects against electrical faults and lightning.
5. What is the maximum typical voltage for Class 2 circuits?
A. 12V
B. 30V
C. 60V
D. 120V
ANSWER : B
Explanation: Class 2 circuits are limited to 30 volts.
6. Which tool is used to terminate twisted-pair cables?
A. Multimeter
B. Punch-down tool
C. Fish tape
D. Crimper
ANSWER : B
Explanation: Punch-down tools seat wires into insulation displacement
connectors (IDC).
7. Which color code standard is used for Ethernet wiring?
A. TIA-606
B. TIA-568
C. NEC 800
D. IEEE 802
ANSWER : B
Explanation: TIA-568 defines Ethernet wiring color codes.
8. What does PoE stand for?
,A. Power over Ethernet
B. Packet over Equipment
C. Protocol of Ethernet
D. Power on Entry
ANSWER : A
Explanation: PoE supplies electrical power over Ethernet cables.
9. Which cable type is most immune to electromagnetic interference?
A. UTP
B. STP
C. Coaxial
D. Fiber optic
ANSWER : D
Explanation: Fiber uses light, so it’s immune to EMI.
10. What OSHA regulation focuses on workplace safety?
A. NEC
B. FCC Rules
C. CFR 29
D. TIA Standards
ANSWER : C
Explanation: OSHA regulations are in 29 CFR.
11. Which device regenerates and boosts signals?
A. Router
B. Switch
C. Repeater
D. Patch panel
ANSWER : C
Explanation: Repeaters restore weakened signals.
12. What is the purpose of a patch panel?
, A. Amplify signal
B. Route power
C. Organize cable terminations
D. Ground equipment
ANSWER : C
Explanation: Patch panels manage and organize connections.
13. Which tool measures signal loss in fiber?
A. Multimeter
B. OTDR
C. Tone generator
D. Cable tracer
ANSWER : B
Explanation: OTDR analyzes fiber length and loss.
14. Which connector is used with single-mode fiber?
A. RJ-45
B. BNC
C. SC
D. F-type
ANSWER : C
Explanation: SC connectors are common in fiber systems.
15. What does EMI stand for?
A. Electrical Mode Interference
B. Electromagnetic Interference
C. Electronic Media Interface
D. Energy Management Index
ANSWER : B
Explanation: EMI disrupts electronic signals.
16. Which cable has a central conductor?
