FOA CFOT EXAM 2024 -2025 LATEST
UPDATED 150 QUESTIONS WITH
DETAILED VERIFIED AND 100%
CORRECT ANSWERS ACTUAL
BRAND-NEW EXAM GRADED A+
Fraction of data bits transmitted that are received in error. -
....ANSWER...Bit-Error Rate (BER)
Loss in fiber caused by stress on the fiber bet around a
restrictive radius. - ....ANSWER...Bending Loss /
Microbending Loss
Range of signal frequencies or bit rate within which a fiber
optic component, link or network will operate. The
maximum speed that data can be transmitted over the link.
- ....ANSWER...Bandwidth
The scattering of light in a fiber back toward the source,
used to make OTDR measurements. -
....ANSWER...Backscattering
1
,Reduction in optical power as it passes along a fiber is
called , usually expressed in dB. Devices that
do this purposefully are called -
....ANSWER...Attenuation / Attenuator
Technique involving polishing the end surface of the fiber
to a slight angle to prevent reflectance. Considered better
than convex polishing techniques (PC). -
....ANSWER...Angled Physical Contact (APC)
Signals that are continually changing as opposed to being
digitally encoded. - ....ANSWER...Analog
Portion of fiber optic attenuation resulting from the
conversion of optical power to heat. -
....ANSWER...Absorption
A fiber optic inspector microscope can increase the danger
of high powerd light source by focusing the light out of a
fiber into your eyes. - ....ANSWER...True
A fiber optic power meter measures absolute power in
dBm (dB reference to 1 mw) and when a light source
measures insertions loss in dB. - ....ANSWER...True
2
, Confining light in a material by surrounding it by another
material with lower refractive index is the phenomenon of
- ....ANSWER...Total internal reflection
The largest cause of attenuation in am optical fiber is -
....ANSWER...Scattering
When we say 62.5/125 fiber what does "62.5" means? -
....ANSWER...Core size, diameter in microns
When we say 50/125 fiber what does "125" mean? -
....ANSWER...Cladding size the diameter in microns
An older multimode fiber design with a 50/125 micron
core is now option in premises cabling system because it -
....ANSWER...Has a higher bandwidth which gives more
distance capability with gigabit network
In multimode fiber the attenuation of the fiber is
at 850 nm that's 1300 nm -
....ANSWER...Higher
Which of the following represent a singlemode fiber size ?
- ....ANSWER...9/125
Singlemode fiber has bandwidth in both
multimode and singlemode fiber - ....ANSWER...Greater
3
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