BICSI ITSIMM 8th Edition - Chapter 1 questions with
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verified detailed answers || ||
Graded index optical fiber eliminates the effects of modal dispersion.
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False
Macrobends in optical fiber strands are ________ to the installer.
|| || || || || || || || ||
Visible
In optical fibers, dispersion factors ______ the BER and ______ the effective bandwidth.
|| || || || || || || || || || || ||
DSL technology uses available bandwidth above the POTS range on existing PSTN copper
|| || || || || || || || || || || || ||
loops.
True
Capacitance causes a voltage difference between two wires when seperated by insulation.
|| || || || || || || || || || ||
True
Total dispersion is the _______ modal dispersion and chromatic dispersion.
|| || || || || || || || ||
Sum of ||
,The relationship of core and cladding that make up an optical fiber is called:
|| || || || || || || || || || || || ||
Crosstalk values are typically expressed as a negative decibel value.
|| || || || || || || || ||
True
A ______ equals a frequency of one million cycles in one second.
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Megahertz
It may be possible to eliminate the need for metallic conduit in some environments by using
|| || || || || || || || || || || || || || || ||
screened/shielded cabling. ||
True
The pair lay of a balanced twisted-pair cable varies from approximately 6mm (0.24in) to
|| || || || || || || || || || || || || ||
approximately:
150mm (6in) ||
For OS1a indoor-outdoor, singlemode optical fiber cable, attenuation at 1383 nm can be as
|| || || || || || || || || || || || || ||
high as ______ dB/km.|| || ||
1.5 dB/km
||
,The _____ type of optical fiber cable consists of multiple 1.6mm (.06in) through 3mm (.12in)
|| || || || || || || || || || || || || || ||
subunits of individually jacketed strands under a single overall jacket.
|| || || || || || || || ||
Breakout
The overfilled launch (OFL) bandwidth of an OM5 multimode fiber is _____ MHz-km at
|| || || || || || || || || || || || || ||
850nm.
3500 MHz-km ||
A decrease of _____ dB results in halving of the voltage.
|| || || || || || || || || ||
6 dB
||
Attenuation is also referred to as _____ loss. || || || || || || ||
Insertion
A battery is an example of an AC source.
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False
A 'bel' is a measure of _____ signal strength.
|| || || || || || || ||
Analog
, A codec is used to convert the amplitude changes of various frequencies into a digital format
|| || || || || || || || || || || || || || || ||
for transmission over digital transmission media.
|| || || || ||
True
The _____ cable marking for fire rating designates a 'communications limited use' type of
|| || || || || || || || || || || || || ||
copper cable. ||
CMX
Balanced twisted-pair cabling channel performance associates a frequency of _____ MHz
|| || || || || || || || || || ||
with a TIA Category 5e.
|| || || ||
100 MHz ||
An EMI source is always external to the cable containing the affected circuit.
|| || || || || || || || || || || ||
False
Optical fiber bandwidth is limited by total dispersion, which is the sum of modal dispersion
|| || || || || || || || || || || || || || ||
and chromatic dispersion.
|| ||
True
A stranded wire will always have a _____ overall diameter than a solid wire with the same
|| || || || || || || || || || || || || || || || ||
AWG.
|| || || || || || || || ||
verified detailed answers || ||
Graded index optical fiber eliminates the effects of modal dispersion.
|| || || || || || || || ||
False
Macrobends in optical fiber strands are ________ to the installer.
|| || || || || || || || ||
Visible
In optical fibers, dispersion factors ______ the BER and ______ the effective bandwidth.
|| || || || || || || || || || || ||
DSL technology uses available bandwidth above the POTS range on existing PSTN copper
|| || || || || || || || || || || || ||
loops.
True
Capacitance causes a voltage difference between two wires when seperated by insulation.
|| || || || || || || || || || ||
True
Total dispersion is the _______ modal dispersion and chromatic dispersion.
|| || || || || || || || ||
Sum of ||
,The relationship of core and cladding that make up an optical fiber is called:
|| || || || || || || || || || || || ||
Crosstalk values are typically expressed as a negative decibel value.
|| || || || || || || || ||
True
A ______ equals a frequency of one million cycles in one second.
|| || || || || || || || || || ||
Megahertz
It may be possible to eliminate the need for metallic conduit in some environments by using
|| || || || || || || || || || || || || || || ||
screened/shielded cabling. ||
True
The pair lay of a balanced twisted-pair cable varies from approximately 6mm (0.24in) to
|| || || || || || || || || || || || || ||
approximately:
150mm (6in) ||
For OS1a indoor-outdoor, singlemode optical fiber cable, attenuation at 1383 nm can be as
|| || || || || || || || || || || || || ||
high as ______ dB/km.|| || ||
1.5 dB/km
||
,The _____ type of optical fiber cable consists of multiple 1.6mm (.06in) through 3mm (.12in)
|| || || || || || || || || || || || || || ||
subunits of individually jacketed strands under a single overall jacket.
|| || || || || || || || ||
Breakout
The overfilled launch (OFL) bandwidth of an OM5 multimode fiber is _____ MHz-km at
|| || || || || || || || || || || || || ||
850nm.
3500 MHz-km ||
A decrease of _____ dB results in halving of the voltage.
|| || || || || || || || || ||
6 dB
||
Attenuation is also referred to as _____ loss. || || || || || || ||
Insertion
A battery is an example of an AC source.
|| || || || || || || ||
False
A 'bel' is a measure of _____ signal strength.
|| || || || || || || ||
Analog
, A codec is used to convert the amplitude changes of various frequencies into a digital format
|| || || || || || || || || || || || || || || ||
for transmission over digital transmission media.
|| || || || ||
True
The _____ cable marking for fire rating designates a 'communications limited use' type of
|| || || || || || || || || || || || || ||
copper cable. ||
CMX
Balanced twisted-pair cabling channel performance associates a frequency of _____ MHz
|| || || || || || || || || || ||
with a TIA Category 5e.
|| || || ||
100 MHz ||
An EMI source is always external to the cable containing the affected circuit.
|| || || || || || || || || || || ||
False
Optical fiber bandwidth is limited by total dispersion, which is the sum of modal dispersion
|| || || || || || || || || || || || || || ||
and chromatic dispersion.
|| ||
True
A stranded wire will always have a _____ overall diameter than a solid wire with the same
|| || || || || || || || || || || || || || || || ||
AWG.
