NCTI Exam Fiber III Questions and
Answers 100% Pass
The National Electrical Safety Code (NESC) provides guidelines concerning which
portion of the fiber-optic cable network? - ✔✔(NOT) Safety and health standards that
apply to the work conditions, practices, and installations performed at
telecommunications field installations.
What is a safety concern when aerial fiber-optic cable is installed between poles, even
though there are no high-voltage power lines? - ✔✔The buildup of lethal amounts of
static electricity on the fiber-optic cable that can discharge through a person on a ladder
or some other conductor connected to ground.
What is used in outside plant fiber-optic cable to protect and isolate the optical fibers
from stress? - ✔✔Strength members and buffer tubes.
What is the purpose of grounding to earth? - ✔✔To protect against the adverse effects
of lightning and reduction of static.
What is the minimum amount of slack that must be provided for splicing fiber-optic
cable in underground installations? - ✔✔15 meters on both the inbound and outbound
span.
What information is documented at fiber-optic slack and splice locations? -
✔✔Incoming and outgoing sequential markings showing the cable's physical length.
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 1
, What can be attached to the pulling line to prevent the fiber-optic cable from twisting
during installation? - ✔✔A break-away swivel.
What are two critical factors for a successful installation of fiber-optic cable? - ✔✔Cable
pulling tension and cable bend radius.
What should be done to prevent the buildup of lethal amounts of static electricity on
long lengths of aerial fiber-optic cable? - ✔✔Install grounding clamps, which connect
the cable exterior and metallic messengers to a good solid ground at each pole site.
When working on a ladder, which rungs are forbidden for standing? - ✔✔The top two
rungs of any ladder.
Which component of an optical modulation system contains an optical detector and a
demodulator? - ✔✔Optical receiver.
What is digital modulation? - ✔✔It is the interruption of light waves in a coded
sequence.
Select the answer that best completes this sentence: In analog modulation, the _____ of
the light wave changes in _____ proportion to the _____ analog signal. - ✔✔Intensity;
direct; incoming.
Which type of optical detection involves a photodiode that converts the light waves to
an electrical signal that varies in proportion to intensity changes in the light waves? -
✔✔Direct.
Which layer of a synchronous optical network (SONET) maps the signals into a
synchronous payload envelope (SPE)? - ✔✔Path.
The frame structure of a synchronous transport signal (STS) is divided into two parts.
What are they? - ✔✔Transport overhead - contains section + line layers
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 2
Answers 100% Pass
The National Electrical Safety Code (NESC) provides guidelines concerning which
portion of the fiber-optic cable network? - ✔✔(NOT) Safety and health standards that
apply to the work conditions, practices, and installations performed at
telecommunications field installations.
What is a safety concern when aerial fiber-optic cable is installed between poles, even
though there are no high-voltage power lines? - ✔✔The buildup of lethal amounts of
static electricity on the fiber-optic cable that can discharge through a person on a ladder
or some other conductor connected to ground.
What is used in outside plant fiber-optic cable to protect and isolate the optical fibers
from stress? - ✔✔Strength members and buffer tubes.
What is the purpose of grounding to earth? - ✔✔To protect against the adverse effects
of lightning and reduction of static.
What is the minimum amount of slack that must be provided for splicing fiber-optic
cable in underground installations? - ✔✔15 meters on both the inbound and outbound
span.
What information is documented at fiber-optic slack and splice locations? -
✔✔Incoming and outgoing sequential markings showing the cable's physical length.
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 1
, What can be attached to the pulling line to prevent the fiber-optic cable from twisting
during installation? - ✔✔A break-away swivel.
What are two critical factors for a successful installation of fiber-optic cable? - ✔✔Cable
pulling tension and cable bend radius.
What should be done to prevent the buildup of lethal amounts of static electricity on
long lengths of aerial fiber-optic cable? - ✔✔Install grounding clamps, which connect
the cable exterior and metallic messengers to a good solid ground at each pole site.
When working on a ladder, which rungs are forbidden for standing? - ✔✔The top two
rungs of any ladder.
Which component of an optical modulation system contains an optical detector and a
demodulator? - ✔✔Optical receiver.
What is digital modulation? - ✔✔It is the interruption of light waves in a coded
sequence.
Select the answer that best completes this sentence: In analog modulation, the _____ of
the light wave changes in _____ proportion to the _____ analog signal. - ✔✔Intensity;
direct; incoming.
Which type of optical detection involves a photodiode that converts the light waves to
an electrical signal that varies in proportion to intensity changes in the light waves? -
✔✔Direct.
Which layer of a synchronous optical network (SONET) maps the signals into a
synchronous payload envelope (SPE)? - ✔✔Path.
The frame structure of a synchronous transport signal (STS) is divided into two parts.
What are they? - ✔✔Transport overhead - contains section + line layers
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 2
