FOA CFOT Certification Exam v11
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? - CORRECT 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? - CORRECT
ANSWER- True
When we say 62.5/125 fiber, what does "62.5" mean? - CORRECT ANSWER- core size, the
diameter in microns
When we say 50/125 fiber, what does "125" mean? - CORRECT 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 systems because they _____. - CORRECT 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. - CORRECT ANSWER- Higher
Which of the following represents a singlemode (smaller core size) fiber size? - CORRECT
ANSWER- 9/125 micron
Singlemode fiber has _____ bandwidth than multimode fiber. - CORRECT ANSWER- greater
Most plastic optical fibers are _____. - CORRECT ANSWER- large core step-index
When you strip singlemode or graded index multimode mode glass fiber, you are removing the
____. - CORRECT ANSWER- Primary buffer coating
The proper method of pulling optical fiber cables is to attach the pull wire or tape to the ____ of
the cable. - CORRECT ANSWER- Strength members
According to the references, hybrid cables are cables that contain ____. - CORRECT 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? - CORRECT ANSWER- ribbon
, According to the references, composite cables refer to cables that contain ____> - CORRECT
ANSWER- both optical fibers and copper conductors
Which optical fiber cables must be grounded? - CORRECT ANSWER- all cables that contain
metallic elements
Fiber optic cable for use inside a building must _______. - CORRECT ANSWER- 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 _____. -
CORRECT ANSWER- Multimode fiber
Premises cable jackets are usually color-coded in what color to indicate singlemode fiber? -
CORRECT ANSWER- Yellow
Premises cable jackets are usually color-coded in what color to indicate laser-optimized 50/125
OM3 or OM4 fiber? - CORRECT ANSWER- Aqua
When pulling long lengths of cable in conduit or innerduct, you may need to ____. - CORRECT
ANSWER- Any or all of these as appropriate (Pull from the center to the ends, Use a
breakaway swivel or monitor tension, Lubricate the cable)
In a loose tube cable, a gel or absorbent tape or powder is normally used _____. - CORRECT
ANSWER- To prevent water from entering the cable
Which type of cable is best suited for indoor installation when fibers are to be directly terminated
inside a patch panel with adhesive/polish or prepolished splice connectors? - CORRECT
ANSWER- tight buffer distribution cable
What type of cable may require installation of a breakout kit (also called a furcation or fan out
kit) for termination? - CORRECT ANSWER- loose tube (loose buffer) cable
When pulling cables, the minimum bend radius under tension is generally specified as ______. -
CORRECT ANSWER- 20 times the cable diameter
Cable ties used on fiber optic cables ____. - CORRECT ANSWER- Can harm cables if too
tight, so they should be hand-tightened.
Fiber optic joints (connectors or splices) should have ____. - CORRECT ANSWER- low loss,
minimal reflectance and high mechanical strength
To reduce _____ as well as loss, the end of a connector ferrule is polished to a PC (physical
contact) finish. - CORRECT ANSWER- Reflectance
Factory terminations, such as used for making patchcords, generally use what method of
attaching the connector? - CORRECT ANSWER- Epoxy/polish
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? - CORRECT 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? - CORRECT
ANSWER- True
When we say 62.5/125 fiber, what does "62.5" mean? - CORRECT ANSWER- core size, the
diameter in microns
When we say 50/125 fiber, what does "125" mean? - CORRECT 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 systems because they _____. - CORRECT 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. - CORRECT ANSWER- Higher
Which of the following represents a singlemode (smaller core size) fiber size? - CORRECT
ANSWER- 9/125 micron
Singlemode fiber has _____ bandwidth than multimode fiber. - CORRECT ANSWER- greater
Most plastic optical fibers are _____. - CORRECT ANSWER- large core step-index
When you strip singlemode or graded index multimode mode glass fiber, you are removing the
____. - CORRECT ANSWER- Primary buffer coating
The proper method of pulling optical fiber cables is to attach the pull wire or tape to the ____ of
the cable. - CORRECT ANSWER- Strength members
According to the references, hybrid cables are cables that contain ____. - CORRECT 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? - CORRECT ANSWER- ribbon
, According to the references, composite cables refer to cables that contain ____> - CORRECT
ANSWER- both optical fibers and copper conductors
Which optical fiber cables must be grounded? - CORRECT ANSWER- all cables that contain
metallic elements
Fiber optic cable for use inside a building must _______. - CORRECT ANSWER- 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 _____. -
CORRECT ANSWER- Multimode fiber
Premises cable jackets are usually color-coded in what color to indicate singlemode fiber? -
CORRECT ANSWER- Yellow
Premises cable jackets are usually color-coded in what color to indicate laser-optimized 50/125
OM3 or OM4 fiber? - CORRECT ANSWER- Aqua
When pulling long lengths of cable in conduit or innerduct, you may need to ____. - CORRECT
ANSWER- Any or all of these as appropriate (Pull from the center to the ends, Use a
breakaway swivel or monitor tension, Lubricate the cable)
In a loose tube cable, a gel or absorbent tape or powder is normally used _____. - CORRECT
ANSWER- To prevent water from entering the cable
Which type of cable is best suited for indoor installation when fibers are to be directly terminated
inside a patch panel with adhesive/polish or prepolished splice connectors? - CORRECT
ANSWER- tight buffer distribution cable
What type of cable may require installation of a breakout kit (also called a furcation or fan out
kit) for termination? - CORRECT ANSWER- loose tube (loose buffer) cable
When pulling cables, the minimum bend radius under tension is generally specified as ______. -
CORRECT ANSWER- 20 times the cable diameter
Cable ties used on fiber optic cables ____. - CORRECT ANSWER- Can harm cables if too
tight, so they should be hand-tightened.
Fiber optic joints (connectors or splices) should have ____. - CORRECT ANSWER- low loss,
minimal reflectance and high mechanical strength
To reduce _____ as well as loss, the end of a connector ferrule is polished to a PC (physical
contact) finish. - CORRECT ANSWER- Reflectance
Factory terminations, such as used for making patchcords, generally use what method of
attaching the connector? - CORRECT ANSWER- Epoxy/polish
