Week 9 Chapter 5 Part 1 - Pages 5-1 to 5-43

Question 1

A(n) _____ in the horizontal cabling allows open office spaces to be reconfigured without disturbing cabling runs.

a. Cross-connection
b. Interconnection

Answer 1

b. Interconnection

p 5-20

Question 2

When selecting balanced twisted-pair cabling for PoE power delivery, lighting is considered to have _____ requirements.

a. High power / high data
b. High power / low data
c. Low power / high data
d. Low power / low data

Answer 2

b. High power / low data

p 5-40

Lighting is low data/high power; therefore, 23 AWG min/22 AWG conductors may be recommended.

Question 3

MUTOAs can be used to service work area devices in furniture clusters and wireless access points (WAPs).

a. True
b. False

Answer 3

b. False

p5-29

When using MUTOAs in areas with WAPs, give special attention to the installation of the cabling to access points directly from the TR/TE, not from the MUTOA located in the area. MUTOAs are only intended to service devices in furniture clusters.

Question 4

Equipment cords and coverage area cables used for data and power transmission should have conductors with a minimum size of 0.205 mm2 (24 AWG).

a. True
b. False

Answer 4

a. True

p 5-38

Question 5

When selecting balanced twisted-pair cabling for PoE power delivery, shielded cables often exhibit _____ heat build-up than comparable unshielded cables.

a. More
b. Less

Answer 5

b. Less

p5-40

When selecting balanced twisted pair cabling, shielded cables often exhibit less heat build-up than comparable unshielded cables

Question 6

_____ are not allowed in any balanced twisted-pair cabling system due to the significant risk of decreased performance.

a. Undercarpet telecommunications cables
b. Bridged taps

Answer 6

b. Bridged taps

p 5-16

Because of the significant risk of decreased performance, bridge taps are not allowed in any balanced twisted-pair cabling system (ISP and OSP).

Question 7

The Power over HDBaseT (PoH) standard delivers a maximum of _____ over four balanced twisted-pairs.

a. 100 W

b 95 W

c. 60 W
d. 30 W

Answer 7

b 95 W

p5-37

HDBaseT Alliance created a Power over HDBaseT (PoH) standard that delivers a maximum of 95 W over four pairs. HDBaseT 1.0 and HDBaseT 2.0 have the same power specifications

Question 8

When designing a MUTOA environment, 24 AWG work area equipment cords must not exceed _____ in length.

a. 30 m (98 ft)
b. 27 m (89 ft)
c. 22 m (72 ft)
d. 18 m (59 ft)

Answer 8

c. 22 m (72 ft)

p 5-28

Do not use 24 AWG work area equipment cords with lengths that exceed ≈22 m (72 ft).

Question 9

Application-specific devices are considered to be part of the horizontal cabling system

a. True
b. False

Answer 9

b. False

p 5-15

Application-specific devices shall not be used as part of the horizontal cabling system, and they shall be kept external to the telecommunications outlet/connector and HC (FD).

Question 10

For new installations, consider specifying cabling with 0.326 mm2 (22 AWG) conductors if the specific building system is expected to require power exceeding _____ during the life cycle of the building.

a. 90 W
b. 80 W
c. 70 W
d. 60 W

Answer 10

d. 60 W

p 5-38

For new installations, consider specifying cabling with 0.326 mm2 (22 AWG) conductors if:

• The specific building system (e.g., audio systems, video displays) is expected to require power exceeding 60 W during the life cycle of the building

Question 11

When planning the location of telecommunications outlets, a minimum of _____ telecommunications outlet box(es) must be placed in each work area.

a. One
b. Two
c. Three

Answer 11

a. One

p 5-22

Each work area shall have a minimum of one telecommunications outlet with a minimum of two recognized connectors per outlet.

Question 12

When selecting balanced twisted-pair cabling for PoE power delivery in BAS applications, conductor size is not considered critical to the PoE implementation.

a. True
b. False

Answer 12

a. True

p 5-40

BAS/BMS and facility controls are low power/low data, so conductor size is NOT critical to the PoE implementations. Cable jacket temperature rating of 75 °C (167 °F) and shielding should be given consideration, based on environment

Question 13

When power is applied to twisted-pair cabling, the level of temperature rise will increase when cables are bundled. For all cables, the recommended maximum bundle size is:

a. 30
b. 24
c. 12
d. 6

Answer 13

b. 24

p 5-41

For all cables, recommended maximum bundle size is 24 cables.

Question 14

Which one of the following types of transmission media are not allowed in the horizontal cabling system?

a. OS2 singlemode optical fiber
b. OS1 singlemode optical fiber
c. OS1a singlemode optical fiber

Answer 14

b. OS1 singlemode optical fiber

p 5-17

OS1a and OS2 optical fiber singlemode minimum 2-strand cables and corresponding connecting hardware

Question 15

The addition of either a CP or MUTOA creates an additional connection point in a horizontal cabling run.

a. True
b. False

Answer 15

b. False

p5-29

The functional difference between the CP and the MUTOA in the open office environment is that the CP introduces an additional connection for each horizontal cabling run.

Question 16

The recommended amount of cable slack in the telecommunications room for an optical fiber horizontal cabling system is:

a. 10 m (33 ft)
b. 4.6 m (15 ft)
c. 3 m (10 ft)
d. 2.1 m (7 ft)

Answer 16

c. 3 m (10 ft)

p 5-19

Optical fiber cabling—Sufficient to reach the farthest corner of the TR via the pathways plus the distance from floor to ceiling and an additional ≈3 m (10 ft) of slack for storage inside hardware without exceeding the ≈90 m (295 ft) limitation.

Question 17

_____ is a method where two connecting hardware units (e.g., balanced twisted-pair, optical fiber) are linked by patch cords or jumpers and used to connect active equipment to the horizontal cabling system.

a. Interconnection
b. Cross-connection

Answer 17

b. Cross-connection

p 5-10

Cross-connection is a method where two connecting hardware units (e.g., balanced twisted-pair, optical fiber) are linked by patch cords or cross-connect jumpers and used to connect active equipment to the horizontal cabling system.

Question 18

A work area telecommunications outlet box should be located within _____ of an electrical outlet.

a. 1 m (3.3 ft)
b. 0.91 m (3 ft)
c. 300 mm (12 in)
d. 0.6 m (2 ft)

Answer 18

a. 1 m (3.3 ft)

p 5-23

The work area telecommunications outlet box should be located near an electrical outlet (e.g., within ≈1 m [3.3 ft]) and installed at the same height

Question 19

Application-specific devices are considered to be part of the horizontal cabling system.

a. True
b. False

Answer 19

b. False

p 5-15

Application-specific devices shall NOT be used as part of the horizontal cabling system, and they shall be kept external to the telecommunications outlet/connector and HC (FD).

Question 20

A conduit run is installed from the ER to a TR. It has two (2) 90 degree bend and a length of 20 m (65 ft). What will be the MINIMUM test rating of the pull cord left in the conduit?

a. 20 kg (44 lb)
b. 40 kg (88 lb)
c. 60 kg (132 lb)
d. 90 kg (200 lb)

Answer 20

d. 90 kg (200 lb)

Doesn’t matter on bends or length. Pull cord installed always need to have a minimum pull tensile strength of 200 ft lbs.

Question 21

You are designing a horizontal distribution system that will have a zone box located 71.6 m (235 ft) away from the telecommunications room (TR). A 50 mm (2 in) conduit is designed from the TR to a pull box located 36.6 m (120 ft) away from the TR. A 1 1/2 inch conduit is designed from the pull box to the zone box located 35.1 m (115 ft) beyond the pull box. Assuming no conduit bends, and excluding the TR and zone box, what is the total number of pull boxes/pull points required in this horizontal conduit system between the telecommunications room (TR) and zone box?

a. 2
b. 3
c. 4
d. 5

Answer 21

b. 3

Pull box at 100’ + pull box at 120’ + pull box at 220’ = Three (3) total

Pull points or pull boxes should be placed in sections of conduit that are ≈30.5 m (100 ft)

Question 22

When placing an optical fiber cable in the horizontal optical fiber cabling subsystem, what is the MAXIMUM number of splices that can be used?

a. 1
b. 2
c. 3
d. 4

Answer 22

b. 2

p 5-16

When used in this manner, there shall be no more than two splices in the individual horizontal cabling channel. An additional two splices would be allowed if pigtail splicing connectors are located at a CP.

Question 23

On a project with three small conference rooms, a break room, and twelve private offices, what is the MINIMUM number of telecommunications outlet boxes required?

a. 16
b. 24
c. 40
d. 46

Answer 23

a. 16

p 5-22

Each work area shall have a minimum of ONE telecommunications outlet with a minimum of two recognized connectors per outlet

Question 24

When specifying telecommunications outlet boxes, all of the following should be considered EXCEPT:

a. Outlet box shall be a minimum of 100 mm (4 in) x 100 mm (4 in) x 76 mm (3 in)
b. Outlet boxes should be installed near an electric outlet at the same height
c. Different outlet boxes have different support requirements
d. Floor mounted telecom outlet boxes should be coordinated with furniture to minimize the potential trip hazard

Answer 24

a. Outlet box shall be a minimum of 100 mm (4 in) x 100 mm (4 in) x 76 mm (3 in)

p 5-22

The outlet box should be a minimum of ≈100 mm (4 in) × ≈100 mm (4 in) × ≈57 mm (2.25). This will accommodate one or two 27 mm (1 trade size) conduits.

Question 25

In a run requiring 15 m (50 ft) of cable between the floor distributor and the consolidation point, the MAXIMUM length of cable allowed between the CP and the telecommunications outlet is:

a. 27.4 m (90 ft)
b. 36.5 m (120 ft)
c. 45.8 m (150 ft)
d. 75 m (242 ft)

Answer 25

d. 75 m (242 ft)

p 5-17

Within the permanent link, the maximum cable length shall be no more than ≈90 m (295 ft) regardless of the type of transmission media used.

Question 26

Important considerations when designing telecommunications distribution within modular furniture include all of the following EXCEPT:

a. How the furniture pathways will be connected to horizontal building pathways
b. Separation of telecommunications cabling and electrical power
c. Diameter of cable to be installed
d. Maximum initial fill ratio of 40 percent when derated because of corners

Answer 26

d. Maximum initial fill ratio of 40 percent when derated because of corners

p 5-23

Question 27

When installing outlet boxes in 10 private offices in an area which may prove to be difficult to install future additional telecommunications outlets, the MINIMUM quantity of outlet boxes that should be installed is:

a. 10
b. 20
c. 30
d. Based on the type of cabling specified

Answer 27

b. 20

p 5-22

For work areas in which it may be difficult to install future additional telecommunications outlets/connectors (e.g., in private offices), a minimum of TWO telecommunications outlets should be provided and located for equipment access flexibility (e.g., on opposing walls).

Question 28

An open office design is made up of three furniture clusters and contains a total of nine work areas. How many multiuser telecommunications outlet assemblies (MUTOA) should be in the design?

a. 1
b. 3
c. 4
d. 6

Answer 28

b. 3

p 5-27

Each open office furniture cluster should be served by at least one MUTOA. A single MUTOA should be limited to serving a maximum of 12 work areas (all part of one furniture cluster), taking into account the maximum work area equipment cord length requirements.

Question 29

A furniture cluster with 26 requires a MINIMUM of how many multiuser telecommunications outlet assembly (MUTOA)?

a. 1
b. 2
c. 3
d. 4

Answer 29

c. 3

p 5-27

Each open office furniture cluster should be served by at least one MUTOA. A single MUTOA should be limited to serving a maximum of 12 work areas (all part of one furniture cluster), taking into account the maximum work area equipment cord length requirements.

or 26 / 12 ~ round up 2.167 ~ 3

Question 30

What type of fiber optic cable is manufactured to protect individual glass strands and is primarily designed for use inside buildings?

a. Ribbon
b. Tight buffered
c. Loose tube
d. Air blown

Answer 30

b. Tight buffered

p 6-22

It protects the optical fiber by supporting each strand of glass with a buffer coating extruded over the base optical fiber’s 250-μm acrylate coating.