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FOA CFOT CERTIFICATION V11 LATEST FINAL EXAM
UPDATED FOR 2025-2026 COMPREHENSIVE QUESTIONS
WITH 100% CERTIFIED, ELABORATED & VERIFIED
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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/ 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
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.
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
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
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)
