Fiber Installation and Activation Exam Questions & Answers Latest Solution
Fiber Installation and Activation Exam
Questions & Answers Latest Solution
All fiber-optic communication systems must contain - ✔✔✔ - An optical fiber transmission medium
The optical fiber core - ✔✔✔ - Transmits the optical signal, and its structure and
chemical makeup are critical to fiber operation.
Wavelengths used in a fiber-optic communication system - ✔✔✔ - Include 1,310 nm and 1,550 nm in
single-mode transmission
systems.
As a lightwave enters an optical fiber, - ✔✔✔ - Its speed decreases, and the lightwave refracts at an
angle.
Attenuation in fiber - ✔✔✔ - Can be caused by absorption, scattering, macrobends, and
fiber numerical aperture mismatch.
Which of the following is not an advantage of optical
fiber? - ✔✔✔ - Fiber carries more electrical current and radiates more
energy than coaxial cable.
Which of the following is true about light source selection
criteria? - ✔✔✔ - Cost should never be a higher concern than the quality of
the signal required to meet system performance.
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,Fiber Installation and Activation Exam Questions & Answers Latest Solution
Laser diodes - ✔✔✔ - 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? - ✔✔✔ - Silicon is a more suitable photodetector material than
indium gallium arsenide for wavelengths of 1,310 or
1,550 nm.
Avalanche photodiode detectors - ✔✔✔ - Require high stability power supplies because bias voltages
to create high electrical fields also must be high.
Fiber Optics - ✔✔✔ - Light transmission through optical fibers for communications purposes.
Hybrid Fiber/Coax (HFC) - ✔✔✔ - A broadband cable system architecture that uses both fiber-optic and
coaxial cable.
Fiber to the home (FTTH) - ✔✔✔ - Distribution of communication services by providing fiber-optic links
all the way to each house
Wavelength - ✔✔✔ - 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.
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, Fiber Installation and Activation Exam Questions & Answers Latest Solution
Single- mode - ✔✔✔ - Single mode fiber allows only one mode of signal propagation through the fiber
core material. The small size of the core along with the fiber graded refractive index provides a narrow
path for the signal to flow allowing greater distance and decreased modal dispersion. the use of single
mode fiber dominates the Cable and Telecommunications metro and long haul networks and is by far
the most commonly used fiber type outside plant applications.
Light Source - ✔✔✔ - Generic term for an LED or Laser type transmitter; term usually used in optical test
equipment.
Photodetector - ✔✔✔ - An electro-optic device that transforms light energy into electrical energy.
Light Emitting Diode (LED) - ✔✔✔ - A semiconductor device that emits incoherent light formed by the
positive-negative (P-N) junction.
Laser diode - ✔✔✔ - Similar to LED's in concept, the laser diode operates at gigabit and higher speeds.
Modulation - ✔✔✔ - The coding of information onto a carrier frequency. Modulation my use amplitude,
frequency, phase or time, plus many forms of on/off digital coding.
Wavelength Division Multiplexing (WDM) - ✔✔✔ - combination of tow or more optical signals for
transmission over a common optical path, usually a single fiber. WDM devices have a channel
wavelength spacing greater than or equal to 50 nm. They typically separate a channel in one
conventional transmission window from another.
Core - ✔✔✔ - The light guiding part of the fiber with a refractive index higher than that of the cladding.
Cladding - ✔✔✔ - The low refractive index material that surrounds the core of an optical fiver and
provides the optical refractive barrier and protection of the core; the transparent material, usually glass
that surrounds the core of an optical fiber, causing any dispersed light to be reflected back into the
central core, thereby helping to maintain signal strength over long distances.
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Fiber Installation and Activation Exam
Questions & Answers Latest Solution
All fiber-optic communication systems must contain - ✔✔✔ - An optical fiber transmission medium
The optical fiber core - ✔✔✔ - Transmits the optical signal, and its structure and
chemical makeup are critical to fiber operation.
Wavelengths used in a fiber-optic communication system - ✔✔✔ - Include 1,310 nm and 1,550 nm in
single-mode transmission
systems.
As a lightwave enters an optical fiber, - ✔✔✔ - Its speed decreases, and the lightwave refracts at an
angle.
Attenuation in fiber - ✔✔✔ - Can be caused by absorption, scattering, macrobends, and
fiber numerical aperture mismatch.
Which of the following is not an advantage of optical
fiber? - ✔✔✔ - Fiber carries more electrical current and radiates more
energy than coaxial cable.
Which of the following is true about light source selection
criteria? - ✔✔✔ - Cost should never be a higher concern than the quality of
the signal required to meet system performance.
©®™ Page 1
,Fiber Installation and Activation Exam Questions & Answers Latest Solution
Laser diodes - ✔✔✔ - 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? - ✔✔✔ - Silicon is a more suitable photodetector material than
indium gallium arsenide for wavelengths of 1,310 or
1,550 nm.
Avalanche photodiode detectors - ✔✔✔ - Require high stability power supplies because bias voltages
to create high electrical fields also must be high.
Fiber Optics - ✔✔✔ - Light transmission through optical fibers for communications purposes.
Hybrid Fiber/Coax (HFC) - ✔✔✔ - A broadband cable system architecture that uses both fiber-optic and
coaxial cable.
Fiber to the home (FTTH) - ✔✔✔ - Distribution of communication services by providing fiber-optic links
all the way to each house
Wavelength - ✔✔✔ - 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.
©®™ Page 2
, Fiber Installation and Activation Exam Questions & Answers Latest Solution
Single- mode - ✔✔✔ - Single mode fiber allows only one mode of signal propagation through the fiber
core material. The small size of the core along with the fiber graded refractive index provides a narrow
path for the signal to flow allowing greater distance and decreased modal dispersion. the use of single
mode fiber dominates the Cable and Telecommunications metro and long haul networks and is by far
the most commonly used fiber type outside plant applications.
Light Source - ✔✔✔ - Generic term for an LED or Laser type transmitter; term usually used in optical test
equipment.
Photodetector - ✔✔✔ - An electro-optic device that transforms light energy into electrical energy.
Light Emitting Diode (LED) - ✔✔✔ - A semiconductor device that emits incoherent light formed by the
positive-negative (P-N) junction.
Laser diode - ✔✔✔ - Similar to LED's in concept, the laser diode operates at gigabit and higher speeds.
Modulation - ✔✔✔ - The coding of information onto a carrier frequency. Modulation my use amplitude,
frequency, phase or time, plus many forms of on/off digital coding.
Wavelength Division Multiplexing (WDM) - ✔✔✔ - combination of tow or more optical signals for
transmission over a common optical path, usually a single fiber. WDM devices have a channel
wavelength spacing greater than or equal to 50 nm. They typically separate a channel in one
conventional transmission window from another.
Core - ✔✔✔ - The light guiding part of the fiber with a refractive index higher than that of the cladding.
Cladding - ✔✔✔ - The low refractive index material that surrounds the core of an optical fiver and
provides the optical refractive barrier and protection of the core; the transparent material, usually glass
that surrounds the core of an optical fiber, causing any dispersed light to be reflected back into the
central core, thereby helping to maintain signal strength over long distances.
©®™ Page 3
