Progression Maintenance Tech II - III Conventional Study Guide.
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Course
NCTI
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NCTI
buffer tubes - A flexible cylindrical structure that houses, compartmentalizes, and protects smaller groups of optical fibers within larger multi-fiber cables.
pigtails - A length of optical fiber with a connector at only one end, which may be spliced to a smaller diameter optical fiber for ...
buffer tubes a flexible cylindrical structure that houses
and protects smaller groups of optical fibers within larger multi fiber cables pigtails a length of optical fibe
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Progression: Maintenance Tech II - III
Conventional Study Guide
buffer tubes - ✔ A flexible cylindrical structure that houses, compartmentalizes, and
protects smaller groups of optical fibers within larger multi-fiber cables.
pigtails - ✔ A length of optical fiber with a connector at only one end, which may be
spliced to a smaller diameter optical fiber for testing or termination.
acceptance testing - ✔ Length and loss test of fiber-optic cable that is typically
performed twice—when the cable is received from the manufacturer and after the cable
is installed and spliced into the network.
fiber-to-the-x (FTTx) - ✔ Multipurpose term which includes FTTH (fiber-to-the-home),
FTTC (fiber-to-the-curb), FTTP (fiber-to-the-premises), etc.
mid-entry splice - ✔ Also called an express splice. A splice in fiber-optic cable where
only a select number of optical fibers are cut and spliced. The remaining buffer tubes
and optical fibers remain untouched.
Micron (μm) - ✔ A micrometer: The equivalent of one one-millionth (1 × .000001) of a
meter.
Hermetically sealed closures are used in aerial installations in areas of high temperature
and low humidity. - ✔ False
Splice closures are used to provide the transition between outdoor optical fiber to indoor
fiber. - ✔ False
Splice closures provide weather protection to the exposed buffer tubes, optical fibers,
and splices when the fiber-optic cable jacket is removed and spliced in the outside fiber-
optic cable network. - ✔ True
Splice closures provide strain relief to the fiber-optic cable from axial forces applied to
any of the cables. - ✔ True
What are the general categories of optical splice applications? - ✔ Optical splice
applications can generally be categorized as: in-line splices, branch splices, splitters,
mid-entry splices, pigtails, restoration splices, and splices for acceptance testing.
What must be done at the splice closure if the fiber-optic cable has metallic armor or
strength members? - ✔ National and local electric codes mandate that cable armor and
metallic cable strength members must be bonded together in the splice closure in order
,to form a continuous electrical path from cable to cable, bonding all cables to an
approved ground.
After working with optical fibers, what should be done before touching any part of the
face or eyes and prior to eating? - ✔ Hands should always be washed after working
with optical fibers before touching any part of the face or eyes and prior to eating.
loose-tube - ✔ A specific fiber-optic cable structure in which a loose plastic tube is
extruded around one to 12 individually coated fibers. Several tubes may be inside a
cable.
splice closure - ✔ A metal or plastic environmentally sealed housing used to contain
and protect optical fiber splices; also known as a splice case.
ringing tool - ✔ Tool that cuts a ring into a cable jacket to help remove the jacket.
score - ✔ To mark or place an incision onto a surface, which weakens the material so
that the material breaks along the score.
armor - ✔ Metal covering over cable to protect against environmental hazards such as
construction work or gnawing animals.
rip cord - ✔ Strong yarn material that is placed under the jacket of fiber-optic cable for
the purpose of ripping and then removing the cable's jacket.
aramid yarn - ✔ A form of woven fabric incorporated into fiber-optic cable assemblies,
providing protection, strength, and mechanical bonding options.
strength member - ✔ A steel or dielectric component in fiber-optic cable that adds
strength and support to the cable.
tensile strength - ✔ The maximum load or stress (caused by pulling) that a fiber-optic
cable can bear without tearing apart.
opaque - ✔ Dense to the passage of light.
Hermetically sealed - ✔ The air-tight seal of an amplifier housing or fiber-optic splice
closure.
vault - ✔ A protective enclosure, ranging in a size from large manholes to small
handholes, and used to store active and passive electronics, splice closures, and cable
underground.
Strength member - ✔ A steel or dielectric component in fiber-optic cable that adds
strength and support to the cable.
, Rip cord - ✔ Strong yarn material that is placed under the jacket of fiber-optic cable for
the purpose of ripping and then removing the cable's jacket.
Buffer tube - ✔ A flexible cylindrical structure that houses, compartmentalizes, and
protects smaller groups of optical fibers within larger multi-fiber cables.
Ringing tool - ✔ Tool that cuts a ring around the cable jacket to help remove the jacket.
dielectric - ✔ Material that is a poor or non-conductor of electricity that is used as an
insulating material between conductors.
distribution panels - ✔ A combination of a patch panel and splice panel usually used at
a hub or entrance facility.
HydraSol - ✔ Water-based product developed specifically to remove cable filling gels
and greases from optical fibers.
Room temperature vulcanizing (RTV) - ✔ A silicon, rubber-like compound that is used
as an adhesive and moisture-proof barrier.
blocking kit - ✔ A kit used to create a physical barrier to keep moisture repellent gel in
loose-tube fiber-optic cables from migrating/flowing out of the buffer tubes into splice
trays.
Which of the following are best practices when working with splice closures? - ✔ The
moisture repellent gel can attract contaminants, so the fibers must be cleaned using a
pad soaked with isopropyl alcohol or HydraSol® to remove the gel.
During the cable preparation process, the strength member is trimmed back for
convenience but left long enough to be tightly clamped to a strain-relief lug in the
closure.
Any fiber-optic cable with metallic elements requires a short section of cable jacket to be
removed to expose the metallic armoring or strength member for bonding to ground.
Pay particular attention to the routing of buffer tubes, and the tie wraps used to secure
the tubes in the slack storage loop, so that the tubes are not crushed and the fibers
stressed when the closure is sealed. - ✔ True
When all splicing is complete for a given tray, install the tray cover and secure the tray
in the closure. - ✔ True
Secure the buffer tubes with tie wraps so that there is no movement of the optical fibers
inside the buffer tube. - ✔ False
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