BICSI INSTALLER 1 QUESTIONS WITH
CORRECT ANSWERS 2025-2026
25-pair color code CORRECT ANSWER White - Blue, orange, green, brown,
slate Red - Blue, orange, green, brown, slate
Black - Blue, orange, green, brown, slate
Yellow - Blue, orange, green, brown, slate
Violet - Blue, orange, green, brown, slate
Fiber color code CORRECT ANSWER
Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua
NVP CORRECT ANSWER Nominal Velocity of Propagation
Insertion loss CORRECT ANSWER
The difference in the amount of power received before and after something is inserted into the
circuit.
Resistance CORRECT ANSWER
Resistance is expressed in Ohms, and is the property of a conductor to resist the flow of electri
city through it. V=IR
Inductance CORRECT ANSWER
Is a property of an electromagnetic field built around a conductor that opposes any change in t
he current flow in a circuit
Capacitance CORRECT ANSWER
is a property of conductors that allows storage of electric charges when potential differences e
xist between the conductors.
,Impedance (V) CORRECT ANSWER Total opposition of current flow measured in Ohms
American Wire Gauge (AWG) CORRECT ANSWER
A standard rating that indicates the diameter of a wire, such as the conducting core of a coaxial
cable or the twisted pairs in a UTP cable.
Megahertz (MHz) CORRECT ANSWER
one million hertz, especially as a measure of the frequency of transmissions
Megabit (Mb) CORRECT ANSWER
Approximately one million bits. Often used as a measurement of data transfer throughput.
Bandwidth CORRECT ANSWER
The amount of data that can be transmitted over a network in a given amount of time.
Decibel (dB) CORRECT ANSWER A unit used to compare the loudness of different sounds.
Crosstalk CORRECT ANSWER when data bleeds from one pair to another in a cable
Alien Crosstalk (AXT) CORRECT ANSWER
Unwanted signal coupling from one permanent link to another
USOC CORRECT ANSWER Universal Service Order Code
Coaxial cable types CORRECT ANSWER Series-6 and Series-11
Coaxial connectors CORRECT ANSWER Series-6 uses BNC and F
connectors Series-11 uses F and N connectors
, Fiber connectors CORRECT ANSWER SC, ST, and SST(LC or
cladding CORRECT ANSWER The glass or plastic shield around the core of a fiber-
optic cable. Cladding reflects light back to the core in patterns that vary depending on the tran
smission mode. This reflection allows fiber to bend around corners without impairing the light-
based signal.
Multimode Fiber (MMF) CORRECT ANSWER
Larger core with multiple paths of light. Common for backbone and horizontal cabling in buildi
ngs. OM2 - Not recommended for new installs. OM3 - Higher bandwidth. OM4 -
Highest bandwidth for MMF. 2000m/6500ft limitation. 850 nm and 1300 nm (nanometers)
Singlemode Fiber CORRECT ANSWER
Smaller core with only one path of lights. Horizontal, riser, campus environments.
9 um core, 125 um cladding.
OS1 - LAN, tight buffered construction, 1310/1550 nm
OS2 - Outside Plant, 1310, 1490, 1550, 1625 nm
3000m/9842ft limtations.
Ribbon Fiber CORRECT ANSWER
Multiple 250 um fibers bonded into a flat color coded ribbon. Can splice a bunch at a time.
Fiber - Tight buffer diameter CORRECT ANSWER 900 um
Fiber - Acrylate coating diameter CORRECT ANSWER 250 um
OM1 CORRECT ANSWER 850 nm OFLD- 200 MHz•km (3.5dB/km)
CORRECT ANSWERS 2025-2026
25-pair color code CORRECT ANSWER White - Blue, orange, green, brown,
slate Red - Blue, orange, green, brown, slate
Black - Blue, orange, green, brown, slate
Yellow - Blue, orange, green, brown, slate
Violet - Blue, orange, green, brown, slate
Fiber color code CORRECT ANSWER
Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua
NVP CORRECT ANSWER Nominal Velocity of Propagation
Insertion loss CORRECT ANSWER
The difference in the amount of power received before and after something is inserted into the
circuit.
Resistance CORRECT ANSWER
Resistance is expressed in Ohms, and is the property of a conductor to resist the flow of electri
city through it. V=IR
Inductance CORRECT ANSWER
Is a property of an electromagnetic field built around a conductor that opposes any change in t
he current flow in a circuit
Capacitance CORRECT ANSWER
is a property of conductors that allows storage of electric charges when potential differences e
xist between the conductors.
,Impedance (V) CORRECT ANSWER Total opposition of current flow measured in Ohms
American Wire Gauge (AWG) CORRECT ANSWER
A standard rating that indicates the diameter of a wire, such as the conducting core of a coaxial
cable or the twisted pairs in a UTP cable.
Megahertz (MHz) CORRECT ANSWER
one million hertz, especially as a measure of the frequency of transmissions
Megabit (Mb) CORRECT ANSWER
Approximately one million bits. Often used as a measurement of data transfer throughput.
Bandwidth CORRECT ANSWER
The amount of data that can be transmitted over a network in a given amount of time.
Decibel (dB) CORRECT ANSWER A unit used to compare the loudness of different sounds.
Crosstalk CORRECT ANSWER when data bleeds from one pair to another in a cable
Alien Crosstalk (AXT) CORRECT ANSWER
Unwanted signal coupling from one permanent link to another
USOC CORRECT ANSWER Universal Service Order Code
Coaxial cable types CORRECT ANSWER Series-6 and Series-11
Coaxial connectors CORRECT ANSWER Series-6 uses BNC and F
connectors Series-11 uses F and N connectors
, Fiber connectors CORRECT ANSWER SC, ST, and SST(LC or
cladding CORRECT ANSWER The glass or plastic shield around the core of a fiber-
optic cable. Cladding reflects light back to the core in patterns that vary depending on the tran
smission mode. This reflection allows fiber to bend around corners without impairing the light-
based signal.
Multimode Fiber (MMF) CORRECT ANSWER
Larger core with multiple paths of light. Common for backbone and horizontal cabling in buildi
ngs. OM2 - Not recommended for new installs. OM3 - Higher bandwidth. OM4 -
Highest bandwidth for MMF. 2000m/6500ft limitation. 850 nm and 1300 nm (nanometers)
Singlemode Fiber CORRECT ANSWER
Smaller core with only one path of lights. Horizontal, riser, campus environments.
9 um core, 125 um cladding.
OS1 - LAN, tight buffered construction, 1310/1550 nm
OS2 - Outside Plant, 1310, 1490, 1550, 1625 nm
3000m/9842ft limtations.
Ribbon Fiber CORRECT ANSWER
Multiple 250 um fibers bonded into a flat color coded ribbon. Can splice a bunch at a time.
Fiber - Tight buffer diameter CORRECT ANSWER 900 um
Fiber - Acrylate coating diameter CORRECT ANSWER 250 um
OM1 CORRECT ANSWER 850 nm OFLD- 200 MHz•km (3.5dB/km)
