FOA CFOT Certification Exam v11 2025
QUESTIONS AND 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? - ANS 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? -
ANS True
When we say 62.5/125 fiber, what does "62.5" mean? - ANS core size, the diameter in
microns
When we say 50/125 fiber, what does "125" mean? - ANS 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 _____. - ANS 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. - ANS Higher
Which of the following represents a singlemode (smaller core size) fiber size? - ANS 9/125
1
Page
micron
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, Singlemode fiber has _____ bandwidth than multimode fiber. - ANS greater
Most plastic optical fibers are _____. - ANS large core step-index
When you strip singlemode or graded index multimode mode glass fiber, you are removing the
____. - ANS Primary buffer coating
The proper method of pulling optical fiber cables is to attach the pull wire or tape to the ____
of the cable. - ANS Strength members
According to the references, hybrid cables are cables that contain ____. - ANS 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? - ANS ribbon
According to the references, composite cables refer to cables that contain ____> - ANS both
optical fibers and copper conductors
Which optical fiber cables must be grounded? - ANS all cables that contain metallic elements
Fiber optic cable for use inside a building must _______. - ANS Be rated to meet the
requirements of local building and fire codes
Optical fiber cable with a orange colored jacket generally indicates the cable contains _____. -
ANS Multimode fiber
2
Page
@COPYRIGHT BRAINBARTER 2025/2026
QUESTIONS AND 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? - ANS 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? -
ANS True
When we say 62.5/125 fiber, what does "62.5" mean? - ANS core size, the diameter in
microns
When we say 50/125 fiber, what does "125" mean? - ANS 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 _____. - ANS 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. - ANS Higher
Which of the following represents a singlemode (smaller core size) fiber size? - ANS 9/125
1
Page
micron
@COPYRIGHT BRAINBARTER 2025/2026
, Singlemode fiber has _____ bandwidth than multimode fiber. - ANS greater
Most plastic optical fibers are _____. - ANS large core step-index
When you strip singlemode or graded index multimode mode glass fiber, you are removing the
____. - ANS Primary buffer coating
The proper method of pulling optical fiber cables is to attach the pull wire or tape to the ____
of the cable. - ANS Strength members
According to the references, hybrid cables are cables that contain ____. - ANS 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? - ANS ribbon
According to the references, composite cables refer to cables that contain ____> - ANS both
optical fibers and copper conductors
Which optical fiber cables must be grounded? - ANS all cables that contain metallic elements
Fiber optic cable for use inside a building must _______. - ANS Be rated to meet the
requirements of local building and fire codes
Optical fiber cable with a orange colored jacket generally indicates the cable contains _____. -
ANS Multimode fiber
2
Page
@COPYRIGHT BRAINBARTER 2025/2026
