Structured Cabling T1

Question 1

A BNC connector is used most commonly for data applications when using what type of wiring and/or cabling?

Answer 1

B. Coaxial

Question 2

What code standard is used for bonding requirements?

Answer 2

a. NEC Article 250

Question 3

What is the purpose of firestop products?

Answer 3

To stop the spread of fumes and contain fire.

Question 4

What are the frequency bandwidths for the following cable categories?

Answer 4

Cat 5e: 100mHz; Cat 6: 250mHz; Cat 6A: 500mHz

Question 5

What are some things that you can do to a communications cable that will decrease the performance of the cable?

Answer 5

Kink, flatten, over-bend, tie-wrap too tightly

Question 6

What is the minimum bend radius for 4 pair UTP cable under no load with a diameter of 1/4”?

Answer 6

1”

Question 7

When is it permissible for communications cable to share a cable tray with conductors for power and lighting?

Answer 7

As barriers for separation

Question 8

Why is the location of the equipment rooms important to the performance of the equipment and wiring?

Answer 8

Central location and size of room

Question 9

What is the ANSI/TIA/EIA requirement for pull boxes?

Answer 9

Length is over 100, more than 2 90° bends, U-shaped bend in run.

Question 10

A second telecommunications room shall be added when the area to be served exceeds ___ and they shall be connected by a ___ firestopped conduit.

Answer 10

Answers: 295ft and 3”

Question 11

What are the quantities of 4-paire cables that can be terminated on a 66 block and a 100 block?

Answer 11

12 pair and 24 pair

Question 12

Structured cabling is designed and installed according to the ____ topology

Answer 12

STAR

Question 13

What causes attenuation to increase in a twisted pair cable?

Answer 13

longer cable, greater attenuation

Question 14

What is the difference between a UTP cross-connect wire and UTP patch cord?

Answer 14

The pin outs on the end

Question 15

In a telecommunication room, what are the requirements for plywood coverage and ground?

Answer 15

6 guage stranded copper and a grounding bus bar

Question 16

All metallic cable shields and metallic elements of fiber optic cables should be grounded no more than 50ft from the entry point of the cable/fiber.

Answer 16

50 feet

Question 17

What is the purpose of twisting a pair of wires in a cable assembly?

Answer 17

decrease crosstalk

Question 18

Define the following terms:
Attenuation
NEXT 
Crosstalk
Capacitive Coupling

Answer 18

Attenuation: Insertion loss - signal loss over a distance.
NEXT: Causes undesired leakage from transit pair “crosstalk” onto near-end receive pair of cabling.
Crosstalk: Unwanted reception of signals induced on a communication line.
Capacitive Coupling: Same twist lengths/transfer of energy.

Question 19

What does the Intra-Building Backbone Pathway Sleeve Method require per 40,000 sq ft of usable floor space:

Answer 19

five 4” sleeves

Question 20

What is the purpose of telecommunications electrical protection devices:

Answer 20

Protect the equipment and property from voltage spikes and current.

Question 21

How is fiber optic bandwidth measured?

Answer 21

Hertz/Meter

Question 22

How many pairs are there in each binder group of a multi-pair UTP cable?

Answer 22

25 pair