Fiber Installation and Activation EXAM
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QUESTIONS WITH ANSWERS |\ |\
All fiber-optic communication systems must contain - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔An optical fiber transmission medium
|\ |\ |\ |\ |\
The optical fiber core - CORRECT ANSWERS ✔✔Transmits the
|\ |\ |\ |\ |\ |\ |\ |\ |\
optical signal, and its structure and
|\ |\ |\ |\ |\
chemical makeup are critical to fiber operation.
|\ |\ |\ |\ |\ |\
Wavelengths used in a fiber-optic communication system -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Include 1,310 nm and 1,550 nm in
|\ |\ |\ |\ |\ |\ |\ |\ |\
single-mode transmission |\
systems.
As a lightwave enters an optical fiber, - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Its speed decreases, and the lightwave refracts at an
|\ |\ |\ |\ |\ |\ |\ |\
angle.
Attenuation in fiber - CORRECT ANSWERS ✔✔Can be caused by
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
absorption, scattering, macrobends, and
|\ |\ |\
fiber numerical aperture mismatch.
|\ |\ |\
,Which of the following is not an advantage of optical
|\ |\ |\ |\ |\ |\ |\ |\ |\
fiber? - CORRECT ANSWERS ✔✔Fiber carries more electrical
|\ |\ |\ |\ |\ |\ |\ |\
current and radiates more
|\ |\ |\
energy than coaxial cable.
|\ |\ |\
Which of the following is true about light source selection
|\ |\ |\ |\ |\ |\ |\ |\ |\
criteria? - CORRECT ANSWERS ✔✔Cost should never be a higher
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concern than the quality of
|\ |\ |\ |\
the signal required to meet system performance.
|\ |\ |\ |\ |\ |\
Laser diodes - CORRECT ANSWERS ✔✔Being applied for the
|\ |\ |\ |\ |\ |\ |\ |\ |\
upstream transmission from homes and
|\ |\ |\ |\
businesses are DFB lasers, due to the increased bandwidth
|\ |\ |\ |\ |\ |\ |\ |\
demands of voice and data services
|\ |\ |\ |\ |\
Which of the following is not true about optical detector
|\ |\ |\ |\ |\ |\ |\ |\ |\
selection criteria? - CORRECT ANSWERS ✔✔Silicon is a more
|\ |\ |\ |\ |\ |\ |\ |\ |\
suitable photodetector material than
|\ |\ |\
indium gallium arsenide for wavelengths of 1,310 or
|\ |\ |\ |\ |\ |\ |\
1,550 nm.
|\
, Avalanche photodiode detectors - CORRECT ANSWERS |\ |\ |\ |\ |\ |\
✔✔Require high stability power supplies because bias voltages
|\ |\ |\ |\ |\ |\ |\
to create high electrical fields also must be high.
|\ |\ |\ |\ |\ |\ |\ |\
Fiber Optics - CORRECT ANSWERS ✔✔Light transmission
|\ |\ |\ |\ |\ |\ |\
through optical fibers for communications purposes.
|\ |\ |\ |\ |\
Hybrid Fiber/Coax (HFC) - CORRECT ANSWERS ✔✔A broadband
|\ |\ |\ |\ |\ |\ |\
cable system architecture that uses both fiber-optic and coaxial
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
cable.
Fiber to the home (FTTH) - CORRECT ANSWERS ✔✔Distribution
|\ |\ |\ |\ |\ |\ |\ |\ |\
of communication services by providing fiber-optic links all the way
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to each house
|\ |\
Wavelength - CORRECT ANSWERS ✔✔The length of a sinusoidal
|\ |\ |\ |\ |\ |\ |\ |\ |\
wave form measured from any point on one wave, to the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
corresponding point on the next wave, such as from crest to crest. In |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
other words, a wavelength is the distance an electromagnetic wave
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
travels in the time it takes to oscillate through a complete cycle.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
In optical terms a wavelength and the frequency of light are
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
considered synonymous. Fiver-optic communications typically use
|\ |\ |\ |\ |\ |\
850nm, 1310nm, 1,550 nm wavelengths for signal transport.
|\ |\ |\ |\ |\ |\ |\
|\ |\ |\ |\ |\
QUESTIONS WITH ANSWERS |\ |\
All fiber-optic communication systems must contain - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔An optical fiber transmission medium
|\ |\ |\ |\ |\
The optical fiber core - CORRECT ANSWERS ✔✔Transmits the
|\ |\ |\ |\ |\ |\ |\ |\ |\
optical signal, and its structure and
|\ |\ |\ |\ |\
chemical makeup are critical to fiber operation.
|\ |\ |\ |\ |\ |\
Wavelengths used in a fiber-optic communication system -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Include 1,310 nm and 1,550 nm in
|\ |\ |\ |\ |\ |\ |\ |\ |\
single-mode transmission |\
systems.
As a lightwave enters an optical fiber, - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Its speed decreases, and the lightwave refracts at an
|\ |\ |\ |\ |\ |\ |\ |\
angle.
Attenuation in fiber - CORRECT ANSWERS ✔✔Can be caused by
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
absorption, scattering, macrobends, and
|\ |\ |\
fiber numerical aperture mismatch.
|\ |\ |\
,Which of the following is not an advantage of optical
|\ |\ |\ |\ |\ |\ |\ |\ |\
fiber? - CORRECT ANSWERS ✔✔Fiber carries more electrical
|\ |\ |\ |\ |\ |\ |\ |\
current and radiates more
|\ |\ |\
energy than coaxial cable.
|\ |\ |\
Which of the following is true about light source selection
|\ |\ |\ |\ |\ |\ |\ |\ |\
criteria? - CORRECT ANSWERS ✔✔Cost should never be a higher
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
concern than the quality of
|\ |\ |\ |\
the signal required to meet system performance.
|\ |\ |\ |\ |\ |\
Laser diodes - CORRECT ANSWERS ✔✔Being applied for the
|\ |\ |\ |\ |\ |\ |\ |\ |\
upstream transmission from homes and
|\ |\ |\ |\
businesses are DFB lasers, due to the increased bandwidth
|\ |\ |\ |\ |\ |\ |\ |\
demands of voice and data services
|\ |\ |\ |\ |\
Which of the following is not true about optical detector
|\ |\ |\ |\ |\ |\ |\ |\ |\
selection criteria? - CORRECT ANSWERS ✔✔Silicon is a more
|\ |\ |\ |\ |\ |\ |\ |\ |\
suitable photodetector material than
|\ |\ |\
indium gallium arsenide for wavelengths of 1,310 or
|\ |\ |\ |\ |\ |\ |\
1,550 nm.
|\
, Avalanche photodiode detectors - CORRECT ANSWERS |\ |\ |\ |\ |\ |\
✔✔Require high stability power supplies because bias voltages
|\ |\ |\ |\ |\ |\ |\
to create high electrical fields also must be high.
|\ |\ |\ |\ |\ |\ |\ |\
Fiber Optics - CORRECT ANSWERS ✔✔Light transmission
|\ |\ |\ |\ |\ |\ |\
through optical fibers for communications purposes.
|\ |\ |\ |\ |\
Hybrid Fiber/Coax (HFC) - CORRECT ANSWERS ✔✔A broadband
|\ |\ |\ |\ |\ |\ |\
cable system architecture that uses both fiber-optic and coaxial
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
cable.
Fiber to the home (FTTH) - CORRECT ANSWERS ✔✔Distribution
|\ |\ |\ |\ |\ |\ |\ |\ |\
of communication services by providing fiber-optic links all the way
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to each house
|\ |\
Wavelength - CORRECT ANSWERS ✔✔The length of a sinusoidal
|\ |\ |\ |\ |\ |\ |\ |\ |\
wave form measured from any point on one wave, to the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
corresponding point on the next wave, such as from crest to crest. In |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
other words, a wavelength is the distance an electromagnetic wave
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
travels in the time it takes to oscillate through a complete cycle.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
In optical terms a wavelength and the frequency of light are
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
considered synonymous. Fiver-optic communications typically use
|\ |\ |\ |\ |\ |\
850nm, 1310nm, 1,550 nm wavelengths for signal transport.
|\ |\ |\ |\ |\ |\ |\
