9579699
Descripción
Test por Jeanie Fitzgerald, actualizado hace más de 1 año
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Creado por Jeanie Fitzgerald
hace casi 7 años
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Pregunta 1
Pregunta
_____________ is demonstrated by the connectors ability to withstand hundreds of insertion and withdrawal cycles without failing. This is expressed as mean time between failure.
Respuesta
-
Functionality
-
Durability
-
Coupling
Pregunta 2
Pregunta
One of the purposes of a standard is to ensure a minimal level of acceptable ______________.
Respuesta
-
performance
-
process
-
method
Pregunta 3
Pregunta
While codes and safety standards address the safety of persons and property in the installation or use of a system, codes ________ ensure system functionality.
Respuesta
-
do
-
do not
-
shall
Pregunta 4
Pregunta
The predominant coaxial cables used for video are
Respuesta
-
Series 6, Series 11
-
RG 59, RG 6
Pregunta 5
Pregunta
_______________ 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.
Respuesta
-
Bandwidth
-
Frequency
-
Transmission
Pregunta 6
Pregunta
Twisted pair cable is called ___________where coaxial cable is called _____________.
Respuesta
-
unbalanced, balanced
-
balance, unbalanced
Pregunta 7
Pregunta
All electrical activity produces electric and magnetic fields.
Respuesta
- True
- False
Pregunta 8
Pregunta
The transmission of analog data can be converted from analog format to digital with a ____________.
Respuesta
-
Codec
-
Modem
Pregunta 9
Pregunta
________________ represents the information carrying capacity of a system.
Respuesta
-
Bandwidth
-
Frequency
-
Transmission
Pregunta 10
Pregunta
______________ is a property of conductor that allows storage of electric charges when potential differences
(voltages) exist between the conductors.
Respuesta
-
Inductance
-
Capacitance
-
Resistance
Pregunta 11
Pregunta
In ac circuits, the total opposition to current flow is called ___________, which is measured in ohms.
Respuesta
-
Capacitance
-
Inductance
-
Impedance
Pregunta 12
Pregunta
_______________ is defined in the number of cycles a signal is repeated in a given time period.
Respuesta
-
Frequency
-
Voltage
-
Current
Pregunta 13
Pregunta
The measure of a signal loss resulting from the insertion of a component, link, or channel between a transmitter and receiver is
Respuesta
-
Return loss
-
Cross-talk
-
Attenuation
Pregunta 14
Pregunta
_______________ 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.
Respuesta
-
Inductance
-
Impedance
-
Capacitance
Pregunta 15
Pregunta
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 ________________ .
Respuesta
-
codec
-
modem
Pregunta 16
Pregunta
This is the property of a conductor to resist the flow of electricity through it.
Respuesta
-
Resistance
-
Inductance
-
Impedance
Pregunta 17
Pregunta
The unwanted transfer of a signals electromagnetic energy from one or more circuits to other circuits is called______________.
Respuesta
-
Attenuation
-
Crosstalk
-
Inductance
Pregunta 18
Pregunta
Test equipment uses Nominal Velocity of Propagation (NVP) to determine the length of a cable.
Respuesta
- True
- False
Pregunta 19
Pregunta
______________ quantifies the bandwidth of a cabling system in a frequency range.
( size of the highway )
Respuesta
-
megahertz
-
megabit
-
decibel
Pregunta 20
Pregunta
_____________ refers to the amount of information that can be transported over the media.
( vehicles on the highway )
Respuesta
-
megahertz
-
megabit
-
decibel
Pregunta 21
Pregunta
Electromagnetic interference (EMI) conditions can be remedied by... select all the are correct.
Respuesta
-
shielded cabling
-
increasing physical separation
-
placing unshielded cable in conduit
Pregunta 22
Pregunta
The POTS signal range is transmitted between______________, which is regarded as the minimum range for human speech to be audible and recognizable.
Respuesta
-
300 and 3400 Hz
-
300 and 3400 MHz
-
300 and 3400 kHz
Pregunta 23
Pregunta
System gain and attenuation are typically stated as ______ gain or _______ loss.
Respuesta
-
bandwidth
-
frequency
-
decibel
Pregunta 24
Pregunta
________________ is the ratio of the power of the outgoing signal to the power of the reflected signal and is expressed in decibels.
Respuesta
-
return loss
-
insertion loss
-
cross talk
Pregunta 25
Pregunta
Because of the different twist rates in a multi-pair cable, the physical length of untwisted pairs is not equal.
Respuesta
- True
- False
Pregunta 26
Pregunta
What is the frequency of TIA category 6, ISO category 6/Class E.
Respuesta
-
100 MHz
-
250 MHz
-
500 MHz
Pregunta 27
Pregunta
What are the common modular connectors used in ICT: select all that are correct
Respuesta
-
4P4C
-
6P6C
-
8P8C
Pregunta 28
Pregunta
Delay skew is the difference in the propagation delay between the slowest and fastest pairs within the same cable sheath.
Respuesta
- True
- False
Pregunta 29
Pregunta
110 termination blocks come in increments of________________
Respuesta
-
50, 100, 300, and 900
-
50, 100, 600, and 900
-
50, 150, 300, and 900
Pregunta 30
Pregunta
Bix termination blocks assemblies come in increments of ____________
Respuesta
-
50, 100, 300, 900
-
50, 150, 300, 600
-
50, 250, 300, 900
Pregunta 31
Pregunta
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.
Respuesta
-
low, high
-
high, low
Pregunta 32
Pregunta
In optical fiber, the purpose of the ________ is to confine the light within the _________ by creating a reflective boundary.
Respuesta
-
cladding and core
-
core and acrylate coating
-
core and cladding
Pregunta 33
Pregunta
_____________ is the most common for backbone and horizontal runs within building and campus environments.
Respuesta
-
multi-mode
-
single-mode
Pregunta 34
Pregunta
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."
Respuesta
- True
- False
Pregunta 35
Pregunta
Who normally enforces the codes and legal regulations for the jurisdiction?
Respuesta
-
OSHA
-
AHJ
-
Fire marshall
Pregunta 36
Pregunta
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.
Respuesta
- True
- False
Pregunta 37
Pregunta
_____________ is the widening or spreading out of the modes in a light pulse as it progresses along the optical fiber.
Respuesta
-
Bandwidth
-
Dispersion
-
Refraction
Pregunta 38
Pregunta
Modal dispersion results from the different optical path lengths in a multi-mode fiber.
Respuesta
- True
- False
Pregunta 39
Pregunta
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...
Respuesta
-
Tight buffered
-
Simplex
-
Loose tube
Pregunta 40
Pregunta
Humans can hear frequencies that range from _______to_________.
Respuesta
-
20 Hz to 2000 Hz
-
20 Hz to 20,000 Hz
-
20 MHz to 20,000 MHz
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