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NCTI MT2 Question and answers correctly solved 2023
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NCTI MT2 Question and answers correctly solved 2023
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NCTI MT2 - MT3In what applications is a splice closure used? - correct answer Splice closures are
used to protect optical fibers and splices against a full range of environmental changes
in aerial installations or below ground in vaults.
When preparing a fiber-optic cable for splicing, what is the purpose of removing
approximately 2.5 cm (1 inch) of jacket and any armor that is present, from the end of
the cable? - correct answer To access the cable's rip cord and to check the cutting
depth of the knife or ringing tool
what does water do to the glass core of an optical fiber? - correct answer Water
causes the glass core of the optical fiber to become opaque, which degrades the signal
as it's transported through the fiber.
when preparing a splice closure, what should be done with the fiberglass rod strength
member that runs down the center of loose-tube fiber-optic cable? - correct answer
Trim the strength member back for convenience, but leave it long enough to be tightly
clamped to a strain-relief lug in the closure.
What is the purpose of splice trays inside splice closures? - correct answer Splice
trays are designed to provide protection for mechanical splices, fusion splice protectors,
and optical splitters as well as provide storage for the required fiber slack.
How should the buffer tubes be secured in the closure? - correct answer The buffer
tubes should be secured with tie wraps to allow slight movement without pulling or
stressing the optical fibers.
How are optical splices secured in a splice tray? - correct answer Retaining clips hold
optical splices in place in a splice tray.
What is the purpose of buffer tubes in fiber-optic cable? - correct answer Buffer tubes
protect and separate the optical fiber in smaller bundles.
When splicing fiber-optic cable, why is it a good safety practice to clean off fiber
strippers and other hand tools after each use? - correct answer To prevent the
accidental transfer of fiber debris or fiber chips onto clean hands.
Where would you expect to install a mid-entry splice in a fiber-optic cable network? -
correct answer A location where a select number of optical fibers need to be spliced,
and the remaining buffer tubes and fibers remain untouched.
Which type of fusion splicer is ideal for fiber-to-the-x (FTTx) splicing? - correct answer
The fixed V-groove splicer.
, What are some prerequisites before performing a fusion splice of optical fibers? -
correct answer A controlled environment such as a splicing van, trailer, or tent and a
stable work surface that is large enough to accommodate the fusion splicer, tools, and
the splice closure.
When would a mid-entry splice in a fiber-optic network be used? - correct answer In a
self-healing ring network that requires only two fibers to feed an optical fiber drop.
What is required of mechanical splices used for acceptance testing? - correct answer
A mechanical splice used for acceptance testing should be simple to use and reusable.
Why are Velcro straps preferred over standard plastic tie wraps when bundling pigtails
for storage in a splice panel? - correct answer Because Velcro straps are removable
and can hold the pigtails together without placing undue strain on the optical fibers.
When preparing fiber-optic cable for connection to a patch panel, how much buffer tube
and fiber slack should be provided? - correct answer Leave enough slack in the buffer
tubes to allow the splice trays to reach the splicing equipment and enough fiber slack to
store on individual trays for later additions, moves, and changes.
If tight-buffered distribution fiber-optic cable is installed between the master splice panel
in an optical entrance enclosure (OEE) and a rack-mounted fiber-optic distribution
panel, where in the facility must the distribution panel be located? - correct answer
The distribution panel can be located anywhere in the facility since the distribution cable
complies with indoor code requirements for riser or plenum installations.
The quality and attenuation value of a mechanical splice of optical fibers is dependent
on which tool during the preparation process? - correct answer The quality and
attenuation value of the mechanical splice of optical fibers is dependent on the quality of
the cleaving tool.
What step should be performed at the beginning of every fusion splicing operation? -
correct answer Make a number of test splices set up the fusion splicer and to verify
the instrument's settings and calibration for both the environment and the type of fiber to
be spliced.
Which fusion splicer alignment method uses a camera to align the optical fibers before
splicing? - correct answer The profile alignment system (PAS) method.
What are the main elements of an optical transmitter? - correct answer Data
encoder/modulator, electrical interface, laser, optical interface.
What is one process that has to happen before digital modulation can occur in an
optical transmitter? - correct answer The data must be encoded.
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