C7 Signal Transmission & Cabling Techniques

Question 1

What is the primary purpose of using twisted pair cabling in low voltage systems?

Accepted Answer

To reduce electromagnetic interference and crosstalk

Answer

To provide power to the system

Answer

To support wireless transmission

Answer

To increase voltage capacity

Question 2

Which connector type is commonly used with coaxial cables in CCTV systems?

Accepted Answer

BNC

Answer

RJ-45

Answer

USB

Answer

HDMI

Question 3

Which cable type is most suitable for high-speed data transmission over long distances?

Accepted Answer

Fiber optic

Answer

Coaxial

Answer

Twisted pair

Answer

Ribbon cable

Question 4

What is attenuation in cabling systems?

Accepted Answer

Loss of signal strength over distance

Answer

Increase in voltage

Answer

Signal delay

Answer

Cable overheating

Question 5

Which standard governs structured cabling systems for commercial buildings?

Accepted Answer

TIA/EIA-568

Answer

NEC 2020

Answer

ISO 9001

Answer

IEEE 802.3

Question 6

What is the benefit of using shielded twisted pair (STP) over unshielded twisted pair (UTP)?

Accepted Answer

Improved signal protection from interference

Answer

Lower cost

Answer

Higher power transmission

Answer

Smaller cable diameter

Question 7

Which type of signal transmission is least susceptible to electrical interference?

Accepted Answer

Optical

Answer

Analog

Answer

Digital

Answer

Radio frequency

Question 8

What is the purpose of a cable tester in network installation?

Accepted Answer

To verify and troubleshoot cable connections

Answer

To amplify signals

Answer

To detect voltage

Answer

To clean connectors

Question 9

Which of the following is essential for ensuring signal quality over Ethernet?

Accepted Answer

Proper termination and cable management

Answer

Using short cables only

Answer

Over-bending the cable

Answer

Placing cables near power lines