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