FOA CFOT Certification Exam v11 Questions & Answers

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? - ANSWERTrue AnswerA 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? - ANSWERTrue AnswerWhen we say 62.5/125 fiber, what does "62.5" mean? - ANSWERcore size, the diameter in microns AnswerWhen we say 50/125 fiber, what does "125" mean? - ANSWERcladding size, the diameter in microns AnswerOM3 and OM4 multimode fiber with a 50/125 micron core are now a popular option in premises cabling systems because they _____. - ANSWERAre "laser optimized" which gives more distance capability with gigabit networks using laser sources AnswerIn-multimode fiber, the attenuation (reduction in optical power) of the fiber is _____ at 850 nm than at 1300 nm. - ANSWERHigher AnswerWhich of the following represents a singlemode (smaller core size) fiber size? - ANSWER9/125 micron AnswerSinglemode fiber has _____ bandwidth than multimode fiber. - ANSWERgreater AnswerMost plastic optical fibers are _____. - ANSWERlarge core step-index AnswerWhen you strip singlemode or graded index multimode mode glass fiber, you are removing the ____. - ANSWERPrimary buffer coating AnswerThe proper method of pulling optical fiber cables is to attach the pull wire or tape to the ____ of the cable. - ANSWERStrength members AnswerAccording to the references, hybrid cables are cables that contain ____. - ANSWERBoth singelmode and multimode optical fibers AnswerWhat type of fiber cable design allows for large numbers of fibers with ultra-high density, small size (diameter) and lower cost? - ANSWERribbon AnswerAccording to the references, composite cables refer to cables that contain ____ - ANSWERboth optical fibers and copper conductors AnswerWhich optical fiber cables must be grounded? - ANSWERall cables that contain metallic elements AnswerSplices are most often used for _____. - ANSWERA permanent joint between two fibers AnswerIf you need to permanently join two fibers together with the lowest loss and least amount of reflectance, which of the following should you choose? - ANSWERfusion splice AnswerMass fusion splicing is normally used on what style of cable? - ANSWERribbon cable AnswerPrior 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. - ANSWERLight source and power meter (LSPM or OLTS) AnswerFor insertion loss testing, the fiber optic test source must match the _____ of the transmission system or the standards covering the cable plant. - ANSWERboth fiber type and wavelenght AnswerAccording to the text, it is recommended that reference test cables be chosen for their __________ - ANSWERlow loss AnswerWhich of the following parameters cannot be measured by OTDRs (optical time domain reflectometers) in fiber optic networks. - ANSWERTransmitter and receiver power AnswerFor safety, a fiber optic technician or installer should always wear ______ when working with optical fiber. - ANSWEREye protection AnswerDuring fiber optic installations, the most common danger is caused by ______. - ANSWERFiber scraps or shards from stripping, cleaving, splicing and termination AnswerThe link loss budget analysis of a cable plant like the diagram shown is done to _________. - ANSWERAll 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) AnswerA link loss budget should be done for every cable plant installation during the ______ phase of a project. - ANSWERDesign AnswerThe loss of connector on each end of the cable plant ______. - ANSWERAre always included in the loss budget AnswerCladding - ANSWERMaterial around the center tube (Look at diagram) AnswerCore - ANSWERCenter tube (Look at diagram) AnswerPrimary Buffer Coating - ANSWERMaterial around the core and cladding, it gives the fiber its distinct color (Blue, Red, Agua, etc) AnswerTraps light in the core to reduce attenuation - ANSWERCladding AnswerIs smaller in singlemode than multimode fiber - ANSWERCore AnswerIs stripped off for termination or splicing - ANSWERPrimary Buffer Coating AnswerThe outside diameter of this part of the fiber is the same for most singlemode and multimode fibers - ANSWERCladding AnswerSinglemode - ANSWER AnswerMulti-mode graded index - ANSWER AnswerMulti-mode step index - ANSWER AnswerTelecom outside plant - ANSWERSinglemode AnswerTelecom FTTx - ANSWERSinglemode AnswerCATV hybrid fiber coax network - ANSWERSinglemode AnswerLAN fiber to the desk - ANSWERMultimode Graded-Index AnswerConsumer digital audio - ANSWERPlastic Optical Fiber (POF) AnswerDistribution cable - ANSWERHas multiple buffered fiber cables (about 12 individual cables), and it does have strength members AnswerBreakout cable - ANSWERHas multiple simplex cables (about 12 or more individual cables), but it does NOT have strength members AnswerLoose Tube cable - ANSWERHas a buffered fiber, strength members and water blocking substance AnswerZipcord cable - ANSWERHas 2 buffered fibers and strength members