CPCT Cabling Standards & Installation Practices 5

Question 1

Which category of UTP cable first introduced the requirement for alien crosstalk testing?

Accepted Answer

Category 6A

Answer

Category 6A (Augmented Category 6) introduced alien crosstalk specifications (ANEXT and AFEXT) because its 500 MHz bandwidth made external crosstalk a significant performance factor.

Question 2

What is the recommended separation distance between telecommunications cables and fluorescent lighting fixtures to reduce EMI?

Accepted Answer

150 mm (6 in)

Answer

TIA-569 recommends a minimum 150 mm (6 in) separation between unshielded telecommunications cables and fluorescent lighting fixtures to minimize electromagnetic interference.

Question 3

When using a 110-type punch-down block, which tool is used to terminate and trim the conductor simultaneously?

Accepted Answer

110 blade impact tool

Answer

A 110 blade impact tool (punch-down tool with a 110 blade) seats the wire into the insulation displacement connector and trims the excess wire in one action.

Question 4

What does the TIA-568 'permanent link' test configuration measure?

Accepted Answer

The installed cable and connectors, excluding equipment and patch cords

Answer

A permanent link test measures the installed horizontal cable plus its connecting hardware (jacks and patch panel ports), but excludes equipment cords and patch cords.

Question 5

A split pair wiring fault will NOT be detected by which test?

Accepted Answer

Wire map test

Answer

A split pair shows correct continuity on a wire map test because all eight pins connect properly, but the paired wires are wrong, which causes excessive crosstalk detectable by NEXT testing.

(CPCT) Certified Premises Cabling Technician Practice Test

(CPCT) Certified Premises Cabling Technician Practice Test

CPCT Cabling Standards & Installation Practices 5