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
Page | 1
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 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
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
STUDYGUIDESOLUTIONS
, Optical fiber cable with a orange colored jacket generally indicates the cable contains _____. - ANSWER-
Multimode fiber
Premises cable jackets are usually color-coded in what color to indicate singlemode fiber? - ANSWER-Yellow
Page | 2
Premises cable jackets are usually color-coded in what color to indicate laser-optimized 50/125 OM3 or OM4
fiber? - ANSWER-Aqua
When pulling long lengths of cable in conduit or innerduct, you may need to ____. - ANSWER-Any or all of these
as appropriate (Pull form 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 _____. - ANSWER-To prevent water
from entering the cable
Which type of cable is best suited for indoor installation when fibers ar to be directly terminated inside a patch
panel with adhesive/polish or prepolished splice connectors? - 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? - ANSWER-loose tube (loose buffer) cable
When pulling cables, the minimum bend radius under tension is generally specified as ______. - ANSWER-20
times the cable diameter
Cable ties used on fiber optic cables ____. - ANSWER-Can harm cables if too tight, so they should be hand-
tightened.
Fiber optic joints (connectors or splices) should have ____. - 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. -
ANSWER-Reflectance
Factory terminations, such as used for making patchcords, generally use what method of attaching the connector?
- ANSWER-Epoxy/polish
According to the references, the connector in the following list with the best or lowest reflectance would be the
____. - ANSWER-SC-APC (Angled Polished Connector)
Splices are most often used for _____. - ANSWER-A permanent joint between two fibers
If you need to permanently join two fibers together with the lowest loss and least amount of reflectance, which of
the following should you choose? - ANSWER-fusion splice
STUDYGUIDESOLUTIONS
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
Page | 1
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 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
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
STUDYGUIDESOLUTIONS
, Optical fiber cable with a orange colored jacket generally indicates the cable contains _____. - ANSWER-
Multimode fiber
Premises cable jackets are usually color-coded in what color to indicate singlemode fiber? - ANSWER-Yellow
Page | 2
Premises cable jackets are usually color-coded in what color to indicate laser-optimized 50/125 OM3 or OM4
fiber? - ANSWER-Aqua
When pulling long lengths of cable in conduit or innerduct, you may need to ____. - ANSWER-Any or all of these
as appropriate (Pull form 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 _____. - ANSWER-To prevent water
from entering the cable
Which type of cable is best suited for indoor installation when fibers ar to be directly terminated inside a patch
panel with adhesive/polish or prepolished splice connectors? - 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? - ANSWER-loose tube (loose buffer) cable
When pulling cables, the minimum bend radius under tension is generally specified as ______. - ANSWER-20
times the cable diameter
Cable ties used on fiber optic cables ____. - ANSWER-Can harm cables if too tight, so they should be hand-
tightened.
Fiber optic joints (connectors or splices) should have ____. - 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. -
ANSWER-Reflectance
Factory terminations, such as used for making patchcords, generally use what method of attaching the connector?
- ANSWER-Epoxy/polish
According to the references, the connector in the following list with the best or lowest reflectance would be the
____. - ANSWER-SC-APC (Angled Polished Connector)
Splices are most often used for _____. - ANSWER-A permanent joint between two fibers
If you need to permanently join two fibers together with the lowest loss and least amount of reflectance, which of
the following should you choose? - ANSWER-fusion splice
STUDYGUIDESOLUTIONS
