Download Fiber Optic Cable Fundamentals and Testing and more Exams Nursing in PDF only on Docsity!
FOA CFOT CERTIFICATION {V11}
EXAM |GUARANTEED PASS
2024\
A fiber optic inspection microscope can increase the danger of high powered light sources by focusing the light coming out of a fiber into your eye. True or False? - ACCURATE ANSWERS✔✔ True A fiber optic power meter measures absolute power in dBM (dB referenced to 1 mw) and, when used with a light source, can measure insertion loss expressed in dB. True or False? - ACCURATE ANSWERS✔✔ True When we say 62.5/125 fiber, what does "62.5" mean? - ACCURATE ANSWERS✔✔ core size, the diameter in microns When we say 50/125 fiber, what does "125" mean? - ACCURATE ANSWERS✔✔ cladding size, the diameter in microns OM3 and OM4 multimode fiber with a 50/125 micron core are now a popular option in premises cabling systems because they _____. - ACCURATE ANSWERS✔✔ Are "laser optimized" which gives more distance capability with gigabit networks using laser sources
In-multimode fiber, the attenuation (reduction in optical power) of the fiber is _____ at 850 nm than at 1300 nm. - ACCURATE ANSWERS✔✔ Higher Which of the following represents a singlemode (smaller core size) fiber size? - ACCURATE ANSWERS✔✔ 9/125 micron Singlemode fiber has _____ bandwidth than multimode fiber. - ACCURATE ANSWERS✔✔ greater Most plastic optical fibers are _____. - ACCURATE ANSWERS✔✔ large core step-index When you strip singlemode or graded index multimode mode glass fiber, you are removing the ____. - ACCURATE ANSWERS✔✔ Primary buffer coating The proper method of pulling optical fiber cables is to attach the pull wire or tape to the ____ of the cable. - ACCURATE ANSWERS✔✔ Strength members According to the references, hybrid cables are cables that contain ____. - ACCURATE ANSWERS✔✔ Both singelmode and multimode optical fibers
When pulling long lengths of cable in conduit or innerduct, you may need to ____. - ACCURATE ANSWERS✔✔ Any or all of these as appropriate (Pull form the center to the ends, Use a breakaway swivel or monitor tension, Lubricate the cable) In a loose tube cable, a gel or absorbent tape or powder is normally used _____. - ACCURATE ANSWERS✔✔ To prevent water from entering the cable Which type of cable is best suited for indoor installation when fibers ar to be directly terminated inside a patch panel with adhesive/polish or prepolished splice connectors? - ACCURATE ANSWERS✔✔ tight buffer distribution cable What type of cable may require installation of a breakout kit (also called a furcation or fan out kit) for termination? - ACCURATE ANSWERS✔✔ loose tube (loose buffer) cable When pulling cables, the minimum bend radius under tension is generally specified as ______. - ACCURATE ANSWERS✔✔ 20 times the cable diameter Cable ties used on fiber optic cables ____. - ACCURATE ANSWERS✔✔ Can harm cables if too tight, so they should be hand- tightened.
Fiber optic joints (connectors or splices) should have ____. - ACCURATE ANSWERS✔✔ low loss, minimal reflectance and high mechanical strength To reduce _____ as well as loss, the end of a connector ferrule is polished to a PC (physical contact) finish. - ACCURATE ANSWERS✔✔ Reflectance Factory terminations, such as used for making patchcords, generally use what method of attaching the connector? - ACCURATE ANSWERS✔✔ Epoxy/polish According to the references, the connector in the following list with the best or lowest reflectance would be the ____. - ACCURATE ANSWERS✔✔ SC-APC (Angled Polished Connector) Splices are most often used for _____. - ACCURATE ANSWERS✔✔ A permanent joint between two fibers If you need to permanently join two fibers together with the lowest loss and least amount of reflectance, which of the following should you choose? - ACCURATE ANSWERS✔✔ fusion splice Mass fusion splicing is normally used on what style of cable? - ACCURATE ANSWERS✔✔ ribbon cable
plant system, Provide a pass/fail loss value for comparison to test values, Ensure the cable plant has been properly installed) A link loss budget should be done for every cable plant installation during the ______ phase of a project. - ACCURATE ANSWERS✔✔ Design The loss of connector on each end of the cable plant ______. - ACCURATE ANSWERS✔✔ Are always included in the loss budget Cladding - ACCURATE ANSWERS✔✔ Material around the center tube (Look at diagram) Core - ACCURATE ANSWERS✔✔ Center tube (Look at diagram) Primary Buffer Coating - ACCURATE ANSWERS✔✔ Material around the core and cladding, it gives the fiber its distinct color (Blue, Red, Agua, etc) Traps light in the core to reduce attenuation - ACCURATE ANSWERS✔✔ Cladding Is smaller in singlemode than multimode fiber - ACCURATE ANSWERS✔✔ Core
Is stripped off for termination or splicing - ACCURATE ANSWERS✔✔ Primary Buffer Coating The outside diameter of this part of the fiber is the same for most singlemode and multimode fibers - ACCURATE ANSWERS✔✔ Cladding Singlemode - ACCURATE ANSWERS✔✔ Multi-mode graded index - ACCURATE ANSWERS✔✔ Multi-mode step index - ACCURATE ANSWERS✔✔ Telecom outside plant - ACCURATE ANSWERS✔✔ Singlemode Telecom FTTx - ACCURATE ANSWERS✔✔ Singlemode CATV hybrid fiber coax network - ACCURATE ANSWERS✔✔ Singlemode LAN fiber to the desk - ACCURATE ANSWERS✔✔ Multimode Graded-Index Consumer digital audio - ACCURATE ANSWERS✔✔ Plastic Optical Fiber (POF)
Must be more than 10 times cable diameter - ACCURATE ANSWERS✔✔ Minimum recommended long term bend radius INDOOR, short, dry conduit runs, risers and plenums terminated inside junction boxes - ACCURATE ANSWERS✔✔ Distribution cable High fiber count in small diameter for metro or long distance - ACCURATE ANSWERS✔✔ Ribbon cable Patch cords and backplanes - ACCURATE ANSWERS✔✔ Simplex and zip cord tight buffer Ideal for outside plant trunk applications inside innerduct or conduit - ACCURATE ANSWERS✔✔ Loose tube (buffer) gel-filled Building cable for conduit, riser and plenum runs without requiring junction boxes - ACCURATE ANSWERS✔✔ Breakout cable Direct buried outside plant - ACCURATE ANSWERS✔✔ Armored loose tube cable ST - ACCURATE ANSWERS✔✔ SC - ACCURATE ANSWERS✔✔
LC - ACCURATE ANSWERS✔✔
MTP - ACCURATE ANSWERS✔✔
Insertion loss (Which Tool(s) do you use?) - ACCURATE ANSWERS✔✔ Light source and power meter Continuity, fiber or cable tracing, duplex connector polarity (Which Tool(s) do you use?) - ACCURATE ANSWERS✔✔ Visual fiber tracer Source or receiver power (Which Tool(s) do you use?) - ACCURATE ANSWERS✔✔ Fiber optic power meter Connector faults (scratches, polish, dirt) (Which Tool(s) do you use?) - ACCURATE ANSWERS✔✔ Inspection microscope Fault location, splice loss, length (Which Tool(s) do you use?) - ACCURATE ANSWERS✔✔ OTDR Continuity, fiber tracing, fault location close to end of a cable (Which Tool(s) do you use?) - ACCURATE ANSWERS✔✔ Visual fault locator Cable to test - ACCURATE ANSWERS✔✔ Cable in the middle wrapped multiple times in circles
Initial pulse and dead zone - ACCURATE ANSWERS✔✔ High spike of energy (upside down U) at the beginning of the graph Loss scale - ACCURATE ANSWERS✔✔ On the graph it will be the Y- axis (up and down) on the left side Splice loss - ACCURATE ANSWERS✔✔ A drop of energy (like a step) in the middle of the graph Fiber Size - ACCURATE ANSWERS✔✔ um (microns) Wavelength - ACCURATE ANSWERS✔✔ nm (nanometers) Bandwidth - ACCURATE ANSWERS✔✔ MHz or GHz (megahertz or gigahertz) Loss - ACCURATE ANSWERS✔✔ dB (decibels) Absolute power - ACCURATE ANSWERS✔✔ dBm (decibels per milliwatts) Cable jacket outside diameter - ACCURATE ANSWERS✔✔ mm or in (millimeters or inches) Cable Length - ACCURATE ANSWERS✔✔ ft or m (feet or meters)
