C7 Signal Transmission & Cabling Techniques 2

Question 1

What is the maximum segment length specified for Cat 6 horizontal cabling in a structured cabling system?

Accepted Answer

90 meters

Answer

TIA-568 specifies 90 meters for horizontal permanent link runs, leaving 10 meters for patch cords.

Question 2

Which type of crosstalk is measured at the far end of a cable from the signal source?

Accepted Answer

FEXT

Answer

FEXT (Far-End Crosstalk) is measured at the opposite end of the cable from the transmitter.

Question 3

A technician needs to run coaxial cable through a plenum space. Which cable type is required?

Accepted Answer

RG-59 plenum-rated (CMP)

Answer

Plenum spaces require CMP-rated cables with low-smoke, low-flame-spread jackets per NEC Article 820.

Question 4

What does the term 'propagation delay skew' refer to in twisted-pair cabling?

Accepted Answer

Difference in signal travel time between the fastest and slowest pairs

Answer

Propagation delay skew is the difference in arrival time between the fastest and slowest pairs, which affects gigabit Ethernet that transmits simultaneously on all pairs.

Question 5

Which shielding designation indicates a cable with an overall foil shield and individually foil-shielded pairs?

Accepted Answer

S/FTP

Answer

S/FTP (or SF/FTP) denotes an overall braid shield (S) with individually foil-shielded (FTP) pairs per ISO/IEC 11801.

(C7) California C7 Low Voltage Systems Contractor Certification Practice Test

(C7) California C7 Low Voltage Systems Contractor Certification Practice Test

C7 Signal Transmission & Cabling Techniques 2