Exam (elaborations)
DATA VOICE AND VIDEO CABLING QUESTIONS AND ANSWERS
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DATA VOICE AND VIDEO CABLING QUESTIONS AND ANSWERS
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Name: Score:80 Multiple choice questions
Term 1 of 80
what separates the home from the cable company ?
The NI
Messenger Cables
Members Of The Organization
In Bundles
Term 2 of 80
NEC code requirements
class 1 circuits are class 4 circuits that are isolated and are used for process control
instrumentation.
article 725 covers class 1,2,3,or 4 remote-control, signaling, and Power-limited circuits.
all articles covered by this can be confusing if you don't understand that articles
1,2,3,and 4 can be either power-limiting or signaling circuits
If Impedance does not remain constant then data can reflect back down a cable.
CURCUITS that are inherently limited in capacity they may require np overcurrent
protection.
Term 3 of 80
what are the special cables you use for long riser runs?
Optical fiber cables
Breakout cables
Distribution cables
Messenger cables
,Term 4 of 80
Installation Quality can affect what?
coaxial cables and fiber optics
balanced transmission
signal; strength and signal quality
coaxial cables
Term 5 of 80
STP Cables
Ethernet
IBM token ring
F connectors and coaxial cables
Wireless ethernet
Term 6 of 80
can you run power cables and copper wires in the same pan?
MPOE
conduit
yes copper on the bottom
no
Term 7 of 80
cross-talk
the ability of a cable to transmit multiple signals simultaneously.
a method of isolating signals to prevent interference.
the process of enhancing signal clarity in a cable.
picking up of signal in one cable from a second nearby cable / cable picking up noise.
,Term 8 of 80
what is the two most important parts of signals ?
coaxial cables and fiber optics
signal strength and signal quality
coaxial cables
screened twisted pair
Term 9 of 80
bit
error rate
low frequency's
accuracy rate
average error
Term 10 of 80
How many pounds of pressure do you need to pull wires?
12 lbs. 1/2 twist wires
25 lbs. 11/21 twist wires
25 lbs. 1/2 twist wires
100 meters 330feet
Term 11 of 80
what is an advantage/ disadvantage of Fiber Optics?
the frequent moving of large cables in an office or home.
is the loss of signal power over the length of a cable. decimals/ feet.
ways of arranging networks.
advantage-less noise/disadvantage-low security.
, Term 12 of 80
CLASS 3 NEC CODE
similar to class 10 circuits
similar to class 2 circuits
similar to class 1 circuits
opposition to alternating currents
Term 13 of 80
what is the major reason to have mobile terminals connected to a network?
the need for more electrical outlets in a workspace.
the desire to reduce the number of devices in a network.
the frequent moving of large cables in an office or home.
the requirement for faster internet speeds in rural areas.
Term 14 of 80
power drops should be at least -------- Inches from communication drops.
Make sure they are Grounded
the frequent moving of large cables in an office or home.
12
conduit
Term 15 of 80
horizontal pull
cables will be pulled from the wiring closet and the work area above a suspended
ceiling.
cables that are only used for outdoor installations.
cables that are installed directly into the walls of a building.
cables that require special tools for installation.
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