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2024/2025 FOA CFOT Certification Exam V11-With 100% Verified Solutions, Exams of Physics

2024/2025 FOA CFOT Certification Exam V11-With 100% Verified Solutions

Typology: Exams

2024/2025

Available from 10/25/2024

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2024/2025 FOA CFOT Certification

Exam V11-With 100% Verified Solutions

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? 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? True When we say 62.5/125 fiber, what does "62.5" mean? core size, the diameter in microns When we say 50/125 fiber, what does "125" mean? 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. 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. Higher Which of the following represents a singlemode (smaller core size) fiber size? 9/125 micron

Singlemode fiber has bandwidth than multimode fiber. greater Most plastic optical fibers are. large core step-index When you strip singlemode or graded index multimode mode glass fiber, you are removing the. Primary buffer coating The proper method of pulling optical fiber cables is to attach the pull wire or tape to the of the cable. Strength members According to the references, hybrid cables are cables that contain. Both singelmode and multimode optical fibers What type of fiber cable design allows for large numbers of fibers with ultra-high density, small size (diameter) and lower cost? ribbon According to the references, composite cables refer to cables that contain > both optical fibers and copper conductors Which optical fiber cables must be grounded? all cables that contain metallic elements

Fiber optic cable for use inside a building must. Be rated to meet the requirements of local building and fire codes Optical fiber cable with a orange colored jacket generally indicates the cable contains . Multimode fiber Premises cable jackets are usually color-coded in what color to indicate singlemode fiber? Yellow Premises cable jackets are usually color-coded in what color to indicate laser- optimized 50/125 OM3 or OM4 fiber? Aqua When pulling long lengths of cable in conduit or innerduct, you may need to. 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. 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? 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?

loose tube (loose buffer) cable When pulling cables, the minimum bend radius under tension is generally specified as. 20 times the cable diameter Cable ties used on fiber optic cables. Can harm cables if too tight, so they should be hand-tightened. Fiber optic joints (connectors or splices) should have. 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. Reflectance Factory terminations, such as used for making patchcords, generally use what method of attaching the connector? Epoxy/polish According to the references, the connector in the following list with the best or lowest reflectance would be the. SC-APC (Angled Polished Connector)

Splices are most often used for. 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? fusion splice Mass fusion splicing is normally used on what style of cable? ribbon cable Prior to cable plant acceptance or system turn-up, a(n) is used to measure the cable plant insertion loss to ensure it is within the loss budget. Light source and power meter (LSPM or OLTS) For insertion loss testing, the fiber optic test source must match the of the transmission system or the standards covering the cable plant. both fiber type and wavelenght According to the text, it is recommended that reference test cables be chosen for their > low loss

Which of the following parameters cannot be measured by OTDRs (optical time domain reflectometers) in fiber optic networks. Transmitter and receiver power For safety, a fiber optic technician or installer should always wear when working with optical fiber. Eye protection During fiber optic installations, the most common danger is caused by. Fiber scraps or shards from stripping, cleaving, splicing and termination The link loss budget analysis of a cable plant like the diagram shown is done to . All of these choices (Ensure the intended communications system will work on the 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. Design The loss of connector on each end of the cable plant. Are always included in the loss budget

Cladding Material around the center tube (Look at diagram) Core Center tube (Look at diagram) Primary Buffer Coating 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 Cladding Is smaller in singlemode than multimode fiber Core Is stripped off for termination or splicing Primary Buffer Coating The outside diameter of this part of the fiber is the same for most singlemode and multimode fibers

Cladding Singlemode Multi-mode graded index Multi-mode step index Telecom outside plant Singlemode Telecom FTTx Singlemode CATV hybrid fiber coax network Singlemode LAN fiber to the desk Multimode Graded-Index

Consumer digital audio Plastic Optical Fiber (POF) Distribution cable Has multiple buffered fiber cables (about 12 individual cables), and it does have strength members Breakout cable Has multiple simplex cables (about 12 or more individual cables), but it does NOT have strength members Loose Tube cable Has a buffered fiber, strength members and water blocking substance Zipcord cable Has 2 buffered fibers and strength members Resistance to water damage Gel-filled and blocked cable Can be installed indoors in air handling areas Plenum rated

Rodent resistance Armored cable Must be more than 20 times cable diameter Minimum recommended bend radius under pulling tension Must be more than 10 times cable diameter Minimum recommended long term bend radius INDOOR, short, dry conduit runs, risers and plenums terminated inside junction boxes Distribution cable High fiber count in small diameter for metro or long distance Ribbon cable Patch cords and backplanes Simplex and zip cord tight buffer Ideal for outside plant trunk applications inside innerduct or conduit

Loose tube (buffer) gel-filled Building cable for conduit, riser and plenum runs without requiring junction boxes Breakout cable Direct buried outside plant Armored loose tube cable ST SC LC MTP Insertion loss (Which Tool(s) do you use?) Light source and power meter

Continuity, fiber or cable tracing, duplex connector polarity (Which Tool(s) do you use?) Visual fiber tracer Source or receiver power (Which Tool(s) do you use?) Fiber optic power meter Connector faults (scratches, polish, dirt) (Which Tool(s) do you use?) Inspection microscope Fault location, splice loss, length (Which Tool(s) do you use?) OTDR Continuity, fiber tracing, fault location close to end of a cable (Which Tool(s) do you use?) Visual fault locator Cable to test Cable in the middle wrapped multiple times in circles Connector mating adapter Device that connect two wires together

Launch cable Cable connected to the light source Light source Device at the end shining a light or laser Power meter Device taking measurements and giving out numbers Receive cable Cable connected to the power meter Connector, showing loss and back reflection High spike (upside down V) in the middle of the graph Distance scale On the graph it will be X-axis (left to right) on the bottom side End of the fiber Zig-Zag lines at the end of the graph

Initial pulse and dead zone High spike of energy (upside down U) at the beginning of the graph Loss scale On the graph it will be the Y-axis (up and down) on the left side Splice loss A drop of energy (like a step) in the middle of the graph Fiber Size um (microns) Wavelength nm (nanometers) Bandwidth MHz or GHz (megahertz or gigahertz) Loss dB (decibels)

Absolute power dBm (decibels per milliwatts) Cable jacket outside diameter mm or in (millimeters or inches) Cable Length ft or m (feet or meters)