Flashcards in Structured Cabling T1 Deck (22)
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1
A BNC connector is used most commonly for data applications when using what type of wiring and/or cabling?
B. Coaxial
2
What code standard is used for bonding requirements?
a. NEC Article 250
3
What is the purpose of firestop products?
To stop the spread of fumes and contain fire.
4
What are the frequency bandwidths for the following cable categories?
Cat 5e: 100mHz; Cat 6: 250mHz; Cat 6A: 500mHz
5
What are some things that you can do to a communications cable that will decrease the performance of the cable?
Kink, flatten, over-bend, tie-wrap too tightly
6
What is the minimum bend radius for 4 pair UTP cable under no load with a diameter of 1/4"?
1"
7
When is it permissible for communications cable to share a cable tray with conductors for power and lighting?
As barriers for separation
8
Why is the location of the equipment rooms important to the performance of the equipment and wiring?
Central location and size of room
9
What is the ANSI/TIA/EIA requirement for pull boxes?
Length is over 100, more than 2 90° bends, U-shaped bend in run.
10
A second telecommunications room shall be added when the area to be served exceeds ___ and they shall be connected by a ___ firestopped conduit.
Answers: 295ft and 3"
11
What are the quantities of 4-paire cables that can be terminated on a 66 block and a 100 block?
12 pair and 24 pair
12
Structured cabling is designed and installed according to the ____ topology
STAR
13
What causes attenuation to increase in a twisted pair cable?
longer cable, greater attenuation
14
What is the difference between a UTP cross-connect wire and UTP patch cord?
The pin outs on the end
15
In a telecommunication room, what are the requirements for plywood coverage and ground?
6 guage stranded copper and a grounding bus bar
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.
50 feet
17
What is the purpose of twisting a pair of wires in a cable assembly?
decrease crosstalk
18
Define the following terms:
Attenuation
NEXT
Crosstalk
Capacitive Coupling
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.
19
What does the Intra-Building Backbone Pathway Sleeve Method require per 40,000 sq ft of usable floor space:
five 4" sleeves
20
What is the purpose of telecommunications electrical protection devices:
Protect the equipment and property from voltage spikes and current.
21
How is fiber optic bandwidth measured?
Hertz/Meter
22
