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 sou...
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
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