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Quiz von Jeanie Fitzgerald, aktualisiert more than 1 year ago
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Erstellt von Jeanie Fitzgerald
vor fast 7 Jahre
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Frage 1
Frage
_____________ is demonstrated by the connectors ability to withstand hundreds of insertion and withdrawal cycles without failing. This is expressed as mean time between failure.
Antworten
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Functionality
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Durability
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Coupling
Frage 2
Frage
One of the purposes of a standard is to ensure a minimal level of acceptable ______________.
Antworten
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performance
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process
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method
Frage 3
Frage
While codes and safety standards address the safety of persons and property in the installation or use of a system, codes ________ ensure system functionality.
Antworten
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do
-
do not
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shall
Frage 4
Frage
The predominant coaxial cables used for video are
Antworten
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Series 6, Series 11
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RG 59, RG 6
Frage 5
Frage
_______________ is the movement of information by electromagnetic energy in the form of electrical or optical signals from one point to another through a transport medium.
Antworten
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Bandwidth
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Frequency
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Transmission
Frage 6
Frage
Twisted pair cable is called ___________where coaxial cable is called _____________.
Antworten
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unbalanced, balanced
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balance, unbalanced
Frage 7
Frage
All electrical activity produces electric and magnetic fields.
Antworten
- True
- False
Frage 8
Frage
The transmission of analog data can be converted from analog format to digital with a ____________.
Antworten
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Codec
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Modem
Frage 9
Frage
________________ represents the information carrying capacity of a system.
Antworten
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Bandwidth
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Frequency
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Transmission
Frage 10
Frage
______________ is a property of conductor that allows storage of electric charges when potential differences
(voltages) exist between the conductors.
Antworten
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Inductance
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Capacitance
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Resistance
Frage 11
Frage
In ac circuits, the total opposition to current flow is called ___________, which is measured in ohms.
Antworten
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Capacitance
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Inductance
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Impedance
Frage 12
Frage
_______________ is defined in the number of cycles a signal is repeated in a given time period.
Antworten
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Frequency
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Voltage
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Current
Frage 13
Frage
The measure of a signal loss resulting from the insertion of a component, link, or channel between a transmitter and receiver is
Antworten
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Return loss
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Cross-talk
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Attenuation
Frage 14
Frage
_______________ is a property of an electromagnetic field built around a conductor that opposes any changes in current flow in a circuit, both ac and varying dc.
Antworten
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Inductance
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Impedance
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Capacitance
Frage 15
Frage
The transmission of digital data can be accomplished on a direct digital basis over a digital circuit, or it can be converted to a analog signal with a ________________ .
Antworten
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codec
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modem
Frage 16
Frage
This is the property of a conductor to resist the flow of electricity through it.
Antworten
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Resistance
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Inductance
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Impedance
Frage 17
Frage
The unwanted transfer of a signals electromagnetic energy from one or more circuits to other circuits is called______________.
Antworten
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Attenuation
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Crosstalk
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Inductance
Frage 18
Frage
Test equipment uses Nominal Velocity of Propagation (NVP) to determine the length of a cable.
Antworten
- True
- False
Frage 19
Frage
______________ quantifies the bandwidth of a cabling system in a frequency range.
( size of the highway )
Antworten
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megahertz
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megabit
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decibel
Frage 20
Frage
_____________ refers to the amount of information that can be transported over the media.
( vehicles on the highway )
Antworten
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megahertz
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megabit
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decibel
Frage 21
Frage
Electromagnetic interference (EMI) conditions can be remedied by... select all the are correct.
Antworten
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shielded cabling
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increasing physical separation
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placing unshielded cable in conduit
Frage 22
Frage
The POTS signal range is transmitted between______________, which is regarded as the minimum range for human speech to be audible and recognizable.
Antworten
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300 and 3400 Hz
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300 and 3400 MHz
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300 and 3400 kHz
Frage 23
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System gain and attenuation are typically stated as ______ gain or _______ loss.
Antworten
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bandwidth
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frequency
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decibel
Frage 24
Frage
________________ is the ratio of the power of the outgoing signal to the power of the reflected signal and is expressed in decibels.
Antworten
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return loss
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insertion loss
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cross talk
Frage 25
Frage
Because of the different twist rates in a multi-pair cable, the physical length of untwisted pairs is not equal.
Antworten
- True
- False
Frage 26
Frage
What is the frequency of TIA category 6, ISO category 6/Class E.
Antworten
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100 MHz
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250 MHz
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500 MHz
Frage 27
Frage
What are the common modular connectors used in ICT: select all that are correct
Antworten
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4P4C
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6P6C
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8P8C
Frage 28
Frage
Delay skew is the difference in the propagation delay between the slowest and fastest pairs within the same cable sheath.
Antworten
- True
- False
Frage 29
Frage
110 termination blocks come in increments of________________
Antworten
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50, 100, 300, and 900
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50, 100, 600, and 900
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50, 150, 300, and 900
Frage 30
Frage
Bix termination blocks assemblies come in increments of ____________
Antworten
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50, 100, 300, 900
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50, 150, 300, 600
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50, 250, 300, 900
Frage 31
Frage
Series 6 and Series 11 have a coated foil shield over the dielectric to shield against_________frequencies, while the braided shield over the coated foil is to shield against ____________frequencies.
Antworten
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low, high
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high, low
Frage 32
Frage
In optical fiber, the purpose of the ________ is to confine the light within the _________ by creating a reflective boundary.
Antworten
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cladding and core
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core and acrylate coating
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core and cladding
Frage 33
Frage
_____________ is the most common for backbone and horizontal runs within building and campus environments.
Antworten
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multi-mode
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single-mode
Frage 34
Frage
A code can be defined as " a rule or set of rules intended to ensure safety during the installation and use of materials, components, fixtures, systems, premises and related subjects."
Antworten
- True
- False
Frage 35
Frage
Who normally enforces the codes and legal regulations for the jurisdiction?
Antworten
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OSHA
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AHJ
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Fire marshall
Frage 36
Frage
Increasing either the length of the optical fiber cable or the wavelength of the light source decreases the bandwidth and the information carrying capacity of the transmission path.
Antworten
- True
- False
Frage 37
Frage
_____________ is the widening or spreading out of the modes in a light pulse as it progresses along the optical fiber.
Antworten
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Bandwidth
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Dispersion
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Refraction
Frage 38
Frage
Modal dispersion results from the different optical path lengths in a multi-mode fiber.
Antworten
- True
- False
Frage 39
Frage
This type of optical fiber is : primarily used outdoors, has shorter jacket length to the fiber length, allows jacket to expand and contract with temperature changes, may contain water blocking material...
Antworten
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Tight buffered
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Simplex
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Loose tube
Frage 40
Frage
Humans can hear frequencies that range from _______to_________.
Antworten
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20 Hz to 2000 Hz
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20 Hz to 20,000 Hz
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20 MHz to 20,000 MHz
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