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