DCI Testing and Certification 2

Question 1

What does a wire map test verify in a copper cable installation?

Accepted Answer

Correct pin-to-pin continuity and absence of miswires

Answer

A wire map test confirms that each conductor is connected to the correct pin at both ends and identifies opens, shorts, reversals, and split pairs.

Question 2

Which parameter measures the ratio of signal power at a far-end receiver compared to the transmitted signal, indicating cable loss?

Accepted Answer

Insertion Loss

Answer

Insertion Loss (formerly called attenuation) measures the reduction in signal strength as it travels along the cable from transmitter to receiver.

Question 3

A tester reports a 'split pair' fault. What condition does this describe?

Accepted Answer

Two conductors from different pairs are wired together at both ends

Answer

A split pair occurs when conductors from two different pairs are substituted, creating correct continuity but causing excessive crosstalk due to unpaired conductors.

Question 4

What is the purpose of performing a Return Loss (RL) test on a copper link?

Accepted Answer

To detect impedance mismatches that cause signal reflections

Answer

Return Loss measures the amount of signal reflected back toward the source due to impedance discontinuities in the cabling.

Question 5

According to ANSI/TIA-568 standards, what is the maximum permanent link length for Category 6A horizontal cabling?

Accepted Answer

90 meters

Answer

The permanent link (from the telecommunications room to the work area outlet, excluding patch cords) is limited to 90 meters for all twisted-pair categories under TIA-568.

(DCI) Data Cabling Installer Practice Test

(DCI) Data Cabling Installer Practice Test

DCI Testing and Certification 2