VDV Applications Flashcards
Noise intensity is measured in ____.
Decibels
The fall protection threshold is __ feet.
6’
The four ladder duty ratings are ?
Type IAA (375lb) Type 1 (250lb) Type 2 (225lb) Type 3 (200lb)
Any chemical on the jobsite is required to have a(n) ____, which contains data about safe use of the chemical.
SDS (Safety Data Sheet)
Solid State Devices can be damaged or destroyed by a static discharge as little as ___ V.
10V
In 1977, ____ was created to bring together OEM’s, designers, installers, and distributers to standardize the industry.
BICSI
What are the two types of Security Systems?
- ) Access Control Systems
2. ) Surveillance Systems
A(n) ____ is a network of hardwired or wireless video monitors that transmits sound and video, usually for large groups of people located in a common area.
Audio-Visual System.
What are the two basic cable types?
- ) Copper
2. ) Fiber-optic
A(n) ____ is a device that connects telecom devices to form a wireless network.
Wireless Access Point (WAP)
WAP’s are easily installed with Cat ___ or better.
5e
What factors are considered when choosing cable paths?
- ) Physical Layout
- ) Capacity
- ) Installation Environment
- ) Support System
110 Blocks are preferred by manufacturers because they have lower ____ and are more ____.
Lower Noise and More Compact.
A 110 type cross-connect can be arranged for use with either ____ or ____.
Jumper Wires or Patch Cords.
Insulation Displacement with a punchdown tool makes terminating faster and provides ____ and ____ results.
Consistent and Repeatable
All test equipment must be used per the ____ from the ____.
Written Instructions from the OEM.
____ is the reduction of power in any type of signal.
Attenuation.
____ is a type of interference caused by signals from adjacent circuits.
Crosstalk
____ is the measure of signal interference as measured at the far end of the cable.
Far End Crosstalk (FEXT)
Attenuation to crosstalk ratio (ACR) is the ratio of ____ to ____.
Attenuation to Near End Crosstalk (NEXT)
A ____ is an analytical tool that can be created by certain types of test instruments and is used to certify all the fibers in a specific cable.
Cable Loss Report
The higher the category of copper cabling, the ____ the twisting of the conductors is.
Tighter.
A tightly twisted wire pair ensures that both wires experience the exact same ____ and ____ of external noise.
Shape and Volume
Twisted pair conductors are called the ____ and ____.
Tip and Ring.
In normal four pair cables, the white of the twisted pair is usually the ____.
Tip.
Substituting a higher rated cable will cost ____ than a specified lower-rated cable.
More.
What is the maximum length of a horizontal cabling run?
100 Meters (about 300’)
Does the maximum length of a cabling run include patchcords at the end?
Yes.
In copper communication systems, ____ are used to send signals.
Voltage Levels
What are the two main types of fiber?
Single-mode and Multi-mode
The construction of a fiber strand includes 6 layers. They include…….
Core, Cladding, Coating, Buffer, Strength Member, Jacket.
T/F: The glass in a fiber core and its cladding refract light in the same way.
False. Cladding refracts it while the core is designed to carry light waves.
T/F: Fuse connectors have extremely low signal loss due to the integrity of the fusion splice and the factory-polished end.
True.
The measure of how well a fiber-optic cable works is the amount of ____, or signal loss, as light travels through it.
Attenuation
T/F: Warranty claims on fiber-optic cables is extremely rare.
True.
Abbreviations and symbols are used throughout prints and provide a clear and concise method to convey information without _____.
Cluttering the prints.
T/F: Symbols on a print are typically standard, such as one regulated by ANSI.
True.
A person who who has the delegated authority to determine, mandate, and enforce code requirements established by governing bodies is called the ____.
AHJ
What is the purpose of standards?
To make an industry uniform and to elevate the quality of work.
In the new MasterFormat spec system, Electrical and Communications are what divisions?
Electrical = 26 Communications = 27
In the new Masterformat spec system, each section has a ___-digit reference number representing ___ levels of detail.
6-digit reference number,
3 levels of detail.
ANSI/TIA-____ deals with Administration (Labeling)
606
ANSI/TIA-____ deals with Grounding/Bonding.
607
Grounding/Bonding VDV equipment is essentially an extension of the ____.
Equipment Grounding Conductor.
A ____ is a temporary, unwanted voltage in an electrical circuit.
Transient Voltage.
A system of all the grounding conductors in a building or structure that are bonded together would be called the grounding ____ system.
Electrode.
IBT stands for ____. It is a device connecting bonding conductors from the communications system to the grounding electrode system.
Intersystem Bonding Termination.
The conductor connecting the IBT to the grounding electrode system must be a __ AWG at minimum.
6
The run of horizontal cable from the patch panel to the wall jack would be called the ____ link.
Permanent
The run of horizontal cable that consists of a ‘disposable’ patchcord between the patch panel and the switch called the ____.
Channel link.
The Permanent link can be no longer than ___ meters.
90 Meters.
____ is the process of sealing any penetration in a fire rated building element in order to maintain its rating.
Firestopping.
____ cable is used in present day for CATV (Cable TV) and Satellite TV. It’s used with ____ connectors.
RG-6 cable and F-type.
____ cable is used for old TV’s and for security surveillance systems. It’s used with ____ connectors.
RG-59 cable and BNC.
A ____ is a test instrument designed to identify and locate a copper conductor or cable.
Toner.
What are the two different parts of a toner?
Signal generator and probe.
T/F: Wiremap testers can be used on active telephone circuits.
False. Phone rings can be ~90V, which can damage the sensitive electronics.
A Certification Test must be done to obtain a ____ from the OEM.
Warranty.
A ____ splice is formed by applying heat to the ends of two different fibers in order to form one continuous strand.
Fusion splice.
Mechanical fiber splices have a usually have a greater degree of signal loss, up to ___ dB.
1 Decibel
Housing enclosures usually have what 3 things?
- ) Strain-relief attachments for cable jackets.
- ) Storage space for excess fiber
- ) A way to mount fibers as to align them with patch cord ends.
T/F: Rather than software to keep track of fiber pathways, a carefully maintained spreadsheet is adequate.
True.
What does VFL stand for?
Visual Fault Locator
What are three reasons for testing and certifying fiber optic systems?
- ) Verification of Operation
- ) Compliance with specs
- ) Certification of performance
What determines the acceptable loss for a fiber optic link?
The loss budget.
When it comes to the strength of an electrical signal, 0 dB would be very ____.
Loud.
When it comes to audible noise in your ear, 0 dB would be very ____.
Quiet.
____ fiber connectors are used in high speed cellular telephone applications.
APC
In applications where the full capability of the fiber is required, a(n) ____ connector can be used.
APC
Jumper wires between 110 blocks and switches are also called ____ wires.
Cross-Connect
What does APC stand for?
Angled Physical Contact
