VDV Cabling Infrastructure 2

Question 1

What is the maximum pulling tension allowed for a 4-pair UTP Cat6 cable during installation?

Accepted Answer

25 lbf

Answer

ANSI/TIA-568 specifies a maximum pulling tension of 25 lbf (110 N) for 4-pair UTP horizontal cabling to avoid stretching or damaging the pairs.

Question 2

Which conduit fill percentage is recommended by NEC for three or more conductors in a single conduit?

Accepted Answer

31%

Answer

NEC Chapter 9 Table 1 limits conduit fill to 40% for two conductors and 31% for three or more conductors to allow heat dissipation and ease future pulls.

Question 3

A technician is installing cable in a plenum space. Which cable jacket rating is required?

Accepted Answer

CMP

Answer

CMP (Communications Plenum) rated cable is required in air-handling spaces because it produces minimal smoke and flame spread when burned.

Question 4

What minimum bend radius must be maintained for a Cat6A UTP cable during installation?

Accepted Answer

8 times the cable diameter

Answer

TIA-568-C.2 requires a minimum bend radius of 8 times the cable outer diameter for Cat6A UTP during and after installation to preserve signal integrity.

Question 5

In a structured cabling system, what is the purpose of the Intermediate Distribution Frame (IDF)?

Accepted Answer

To serve as a sub-distribution point connecting floor-level equipment to the MDF

Answer

The IDF (also called a Telecommunications Room) aggregates horizontal cabling from work area outlets on a floor and connects back to the MDF via backbone cabling.

(VDV) Voice Data Video Technician Certified Practice Test

(VDV) Voice Data Video Technician Certified Practice Test

VDV Cabling Infrastructure 2