DCI Pathways and Spaces 4

Question 1

According to TIA-569, what is the minimum recommended size for a single-user telecommunications room (TR)?

Accepted Answer

7 ft × 7 ft (2.1 m × 2.1 m)

Answer

TIA-569 recommends a minimum telecommunications room size of 7 ft × 7 ft (2.1 m × 2.1 m) for serving a single floor or small coverage area.

Question 2

Which firestopping method uses a flexible foam material that expands when exposed to heat?

Accepted Answer

Intumescent compound

Answer

Intumescent compounds expand significantly when exposed to heat, sealing penetrations to prevent the spread of fire.

Question 3

In a structured cabling system, what is the maximum recommended horizontal cable run length from the TR to the work area outlet?

Accepted Answer

90 meters (295 ft)

Answer

The maximum recommended horizontal cable run is 90 meters (295 ft), which leaves 10 meters for patch cords and work area cords within the 100-meter channel limit.

Question 4

What is the primary advantage of an access floor (raised floor) system in a data center?

Accepted Answer

It provides flexible underfloor cable routing and airflow management

Answer

Access floors provide flexible cable routing pathways beneath the floor and can also serve as a plenum for cold air distribution to equipment.

Question 5

When running cable through a ceiling plenum, which cable jacket rating is required?

Accepted Answer

CMP (Communications Multipurpose Plenum)

Answer

CMP-rated (plenum-rated) cable must be used in ceiling plenum spaces because it has a low-smoke, flame-retardant jacket meeting NFPA 90A requirements.

(DCI) Data Cabling Installer Practice Test

(DCI) Data Cabling Installer Practice Test

DCI Pathways and Spaces 4