Partial preview of the text
Download FOA CFOT CERTIFICATION EXAM V11 QUESTIONS & ANSWERS 2025 and more Exams Engineering in PDF only on Docsity!
FOA CFOT CERTIFICATION EXAM V11 QUESTIONS & ANSWERS
FOA CFOT CERTIFICATION EXAM V11 QUESTIONS & ANSWERS 2025 A fiber optic inspection microscope can increase the danger of high powered light sources by focusing the light coming out of a fiber inlo your eye. True or False? — Correct Answer—Truc A fiber optic power mctcr mcasurcs 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? — Correct Answer—True When we say 62.5/125 fiber, what docs "62.5" mean? — Correct Answer—core size, the diameter in microns When we say 50/125 liber, what does "125" mean? — Correct Answer—cladding size, the diameter in microns OM3 and OM4 multimode fiber with a 50/125 micron core arc now a popular option in premises cabling systems because they . — Correct Answer-Are "laser optimized" which gives more distance capability with gigabit networks using laser sources In—mullimode fiber, the allenuation (reduction in optical power) of the fiber is at 850 nm than at 1300 nm. — Correct Answer—Higher Which of the following represents a singlemode (smaller core sizc) fiber size? — Correct Answer—9/125 micron Singlemode fiber has bandwidth than multimode fiber. — Correct Answer— greater Most plastic optical fibers are . — Correct Answer-—large core step—index When you strip singlemode or graded index multimode mode glass fiber, you are removing Lhe . — Correct Answer—Primary buffer coating The proper method of pulling optical fiber cables is to allach the pull wire or lape to the of the cable. — Correct Answer-Strength members According to the references, hybrid cables are cables that contain . — Correct Answer—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? — Correct Answer-ribbon According to the references, composite cables refer to cables that contain > — Correct Answer—both optical fibers and copper conductors Which optical fiber cables must be grounded? — Correct Answer—all cables that contain metallic clements liber optic cable for use inside a building must . — Correct Answer—Be rated to meet the requirements of local building and fire codes liber optic joints (connectors or splices) should have . — Correct Answer- 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. — Correct Answer—Rellectance Factory lerminalions, such as used for making patchcords, generally use what method of attaching the connector? — Correct Answer—[poxy/polish According to the references, the connector in the following list with the best or lowest reflectance would be the . ~ Correct Answer—SC-APC (Angled Polished Connector) Splices are most often used for . — Correct Answer—A permanent joint between two fibers If you need to permanently join two fibers together with the lowest lass and least amount of reflectance, which of the following should you choose? — Correct Answer—fusion splice Mass fusion splicing is normally used on what style of cable? — Correct Answer— ribbon cable Prior to cable plant acceptance or system turn—up, a(n) is used to measure the cable plant insertion loss to ensure il is within the loss budget. — Correct Answer—Light source and power meter (LSPM or OLTS) lor insertion loss testing, the fiber optic test source must match the of the transmission system or the standards covering the cable plant. — Correct Answer—both fiber type and wavelenght According to the text, it is recommended that reference test cables be chosen for their > — Correct Answer—low loss Which of the following parameters cannot be measured by OTDRs (aptical time domain reflectometers) in fiber optic networks. — Correct Answer—Transmitter and receiver power lor safety, a fiber optic technician or installer should always wear when working with optical fiber. - Correct Answer—Eye proleclian During fiber optic installations, the most common danger is caused by .T Correct Answer—Fiber scraps or shards from stripping, cleaving, splicing and termination The link loss budget analysis of a cable plant like the diagram shown is donc to . ~ Correct Answer—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 phasc of a project. — Correct Answer—Design The loss of connector on cach end of the cable plant . — Correct Answer— Are always included in the loss budget Telecom FTTx — Correct Answer—Singlemode CATY hybrid fiber coax network — Correct Answer—Singlemode LAN fiber to the desk — Correct Answer—Multimode Graded—Index Consumer digital audio — Correct Answer—Plastic Optical Fiber (POF) Distribution cable — Correct Answer—Has multiple buffered fiber cables (about 12 individual cables), and it does have strength members Breakout cable — Correct Answer—Ilas multiple simplex cables (about 12 or more individual cables), but it docs NOT have strength members Loose Tube cable — Correct Answer—Has a buffered fiber, strength members and water blocking substance Zipcord cable — Correct Answer—Has 2 buffered fibers and strength members Resistance to water damage — Correct Answer—Gel—filled and blocked cable Can be installed indoors in air handling areas — Correcl Answer—Plenum rated Rodent resistance — Correct Answer—Armored cable Must be more than 20 times cable diameter — Correct Answer—Minimum recommended bend radius under pulling tension Must be morc than 10 times cable diameter — Correct Answer—Minimum recommended long term bend radius INDOOR, short, dry conduit runs, risers and plenums terminated inside junction bexcs — Correct Answer—Distribution cable High fiber count in small diameter for metro or long distance — Correct Answer— Ribbon cable Patch cords and backplanes — Correct Answer—Simplex and zip cord tight buffer Ideal for outside plant trunk applications inside innerduct or conduit — Correct Answer—Loase tube (bulfer) gel-Tilled Building cable for conduit, riser and plenum runs without requiring junction boxes — Correct Answer—Breakout cable Direct buried outside plant — Correct Answer—Armorced loase tube cable ST — Correct Answer— SC — Correct Answer— Connector mating adapter — Correct Answer—Device that connect two wires together Launch cable — Correct Answer—Cable connected to the light source Light source — Correct Answer—Device at the end shining a light or laser Power meter — Correct Answer—Device taking measurements and giving out numbers Receive cable — Correct Answer—Cable connected to the power meter Connector, showing loss and back reflectian — Correct Answer-—Iligh spike (upside down V) in the middle of the graph Distance scale — Correct Answer—On the graph it will be X-axis (left to right) on the bottom side End of the fiber — Correcl Answer—Zig—Zag lines at Lhe end of the graph Initial pulse and dead zone — Correct Answer-—High spike of energy (upside down U) at the beginning of the graph Loss scale — Correct Answer—On the graph it will be the Y-axis (up and down) on the Ieft side Splice loss — Correct Answer—A drop of cnergy (like a step) in the middle of the graph Fiber Size — Correct Answer—um (microns) Wavelength — Correct Answer—nm (nanometers) Bandwidth — Correct Answer—MI Iz or GIlz (megahertz or gigahertz) Loss — Correct Answer—dB (decibels) Absolute power — Correct Answer—dBm (decibels per milliwatts) Cable jackel outside diameter — Correct Answer—mm or in (millimeters or inches) Cable Length — Correct Answer—ft or m (fect or meters) 
