BICSI TECHNICIAN Exam Questions and
Answers Latest Version
The most common tight-buffer diameter is...
900um
Breakout
Subunits individually jacketed strands under a single overall
jacket
distribution
Multiple 900um tight-buffered strands under a single jacket
OS2
OSP, typically loose tube construction. Used for distances up to
9842ft. (Supports wavelengths of 1310nm, 1383nm, 1550nm)
OS1
Legacy indoor, indoor - outdoor, and OSP fiber, not
recommended for new installations. (Supports wavelengths of
1310nm and 1550nm)
OM2
Is not recommended for new installations (multimode).
OM1
Is no longer recognized for new construction and should only be
used when expanding on existting system composed of OM1
fiber. (Distance limitation of 6562ft)(Supports wavelenghths of
850nm and 1300nm)
OM4
Has the highest multimode bandwith
Multimode Optical Fiber Cable
The most common for backbone and horizontal runs within
buildings and campus environments. (50um core and 125 um
cladding diameter.)
Mode Conditioning Patch Cords
An easy and reliable means of connecting multimode optical fiber
cabling with IEEE 802.3, 1000BASE-LX transmission equipment.
(Only recommended on OM1 and OM2 fiber channels.)
,Singlemode optical fibers typically have a core size of...
9um
The standard diameter size of the cladding of industry optical
fiber is...
125um
Trench/Moat
The third layer of glass that surrounds the core in both bend
insensitive singlemode fiber and bend insensitive multimode fiber
to reflect lost light back into the core.
Optical fiber cabling is required at a footage of...
328ft(100m)
For RF applications such as connections between WAP and
antennas the coaxial cable typically used are...
RG-58 and RG-316
Series 59
Used for video, CATV, and security cameras, has a solid center
conductor and is typically terminated with BNC or F connector.
(higher losses limit it to short distances)
Series 11
Used in video backbone, has a solid or stranded center conductor
and uses F or N connectors. (preferred choice for longer runs)
The predominant coaxial cables are...(3)
series-6, series-11, series-59
Series x cables
Coaxial cables used in broadband applications
Coaxial cables used for RF signal transmission (eg., DAS)
continue to use...
RG Designations
Coaxial cable
Delay Skew
The difference in the propagation delay between the slowest and
fastest pairs within the same cable sheath. (expressed in
nanseconds and is lenghth dependent)
The maximum allowable propagation delay for all catgories
of cabling is measured at... (same as delay skew)
,10mhz
Propagation Delay
The time interval required for a signal to be transmitted from one
end of a circuit to the other. (expressed in nanoseconds and is
length dependent.)
Alien Crosstalk (AXT)
The unwanted signal coupling from a disturbing pair of a 4-pair
cable channel, permanent link, or component to a disturbed pair
of another 4-pair channel, permanent link, or component.
Insertion loss
Subtracted from the far-end crosstalk measurement
Attenuation-to-Crosstalk Ratio, Far End (ACRF)
Is the measure of the unwanted signal transfer that is assessed
by applying a signal on one pair at the near and measuring the
signal transfer level on any disturbed pair at the receiving end of
the cable
A greater negative decibel indicates a _____ _____ of
crosstalk being present.
lower level
Near-End Crosstalk (NEXT)
The measure of the unwanted signal coupling from a transmitter
at the near end into another pair measured at the near end.
The three basic types of crosstalk of interest for balanced
twistwed-pair cabling are...
NEXT, ACR-F, AXT
Return loss
The primary indicator of poor installation practices.
Capacitance
The property of conductors that allows storage of electric charges
when potential differences (voltages) exist between the
conductor. (measured in farads (F))
Inductance
The property of an electrical conductor carrying either ac or
varying dc current to oppose any change in that current flow due
, to to the electromagnetic field set up around that conductor.
(henry)
Impedance
In ac circuits, the total opposition to current flow (Z).
Characteristic Impedance
Input impedance of a uniform transmission line of infinite length
One ohm of resistance will allow 1A (Amp) of current to flow
when 1 ____ of electrical pressure is applied.
volt
Resistance
The property of a conductor to resist the flow of electricity through
it. (expressed in ohms)
Largest Size Guage
4/0 AWG = 460mil
Smallest Size Guage
56 AWG = 0.5mil
A guage change of six numbers, doubles or halves the
conductor's...
diameter
A guage change of three numbers, doubles or halves the...
- conductor's cross-sectional area
- conductor's resistance
Larger guange denote..
smaller wires
Smaller guage denote
Larger wires
As frequency increases, capacitive reactance....
Decreases
Unbalanced Capcitance
The capacitance between a conductor and a ground
Mutual Capacitance
The capacitance between two conductors
Causes a voltage difference between two wires when
separated by insulation
Capacitance
Answers Latest Version
The most common tight-buffer diameter is...
900um
Breakout
Subunits individually jacketed strands under a single overall
jacket
distribution
Multiple 900um tight-buffered strands under a single jacket
OS2
OSP, typically loose tube construction. Used for distances up to
9842ft. (Supports wavelengths of 1310nm, 1383nm, 1550nm)
OS1
Legacy indoor, indoor - outdoor, and OSP fiber, not
recommended for new installations. (Supports wavelengths of
1310nm and 1550nm)
OM2
Is not recommended for new installations (multimode).
OM1
Is no longer recognized for new construction and should only be
used when expanding on existting system composed of OM1
fiber. (Distance limitation of 6562ft)(Supports wavelenghths of
850nm and 1300nm)
OM4
Has the highest multimode bandwith
Multimode Optical Fiber Cable
The most common for backbone and horizontal runs within
buildings and campus environments. (50um core and 125 um
cladding diameter.)
Mode Conditioning Patch Cords
An easy and reliable means of connecting multimode optical fiber
cabling with IEEE 802.3, 1000BASE-LX transmission equipment.
(Only recommended on OM1 and OM2 fiber channels.)
,Singlemode optical fibers typically have a core size of...
9um
The standard diameter size of the cladding of industry optical
fiber is...
125um
Trench/Moat
The third layer of glass that surrounds the core in both bend
insensitive singlemode fiber and bend insensitive multimode fiber
to reflect lost light back into the core.
Optical fiber cabling is required at a footage of...
328ft(100m)
For RF applications such as connections between WAP and
antennas the coaxial cable typically used are...
RG-58 and RG-316
Series 59
Used for video, CATV, and security cameras, has a solid center
conductor and is typically terminated with BNC or F connector.
(higher losses limit it to short distances)
Series 11
Used in video backbone, has a solid or stranded center conductor
and uses F or N connectors. (preferred choice for longer runs)
The predominant coaxial cables are...(3)
series-6, series-11, series-59
Series x cables
Coaxial cables used in broadband applications
Coaxial cables used for RF signal transmission (eg., DAS)
continue to use...
RG Designations
Coaxial cable
Delay Skew
The difference in the propagation delay between the slowest and
fastest pairs within the same cable sheath. (expressed in
nanseconds and is lenghth dependent)
The maximum allowable propagation delay for all catgories
of cabling is measured at... (same as delay skew)
,10mhz
Propagation Delay
The time interval required for a signal to be transmitted from one
end of a circuit to the other. (expressed in nanoseconds and is
length dependent.)
Alien Crosstalk (AXT)
The unwanted signal coupling from a disturbing pair of a 4-pair
cable channel, permanent link, or component to a disturbed pair
of another 4-pair channel, permanent link, or component.
Insertion loss
Subtracted from the far-end crosstalk measurement
Attenuation-to-Crosstalk Ratio, Far End (ACRF)
Is the measure of the unwanted signal transfer that is assessed
by applying a signal on one pair at the near and measuring the
signal transfer level on any disturbed pair at the receiving end of
the cable
A greater negative decibel indicates a _____ _____ of
crosstalk being present.
lower level
Near-End Crosstalk (NEXT)
The measure of the unwanted signal coupling from a transmitter
at the near end into another pair measured at the near end.
The three basic types of crosstalk of interest for balanced
twistwed-pair cabling are...
NEXT, ACR-F, AXT
Return loss
The primary indicator of poor installation practices.
Capacitance
The property of conductors that allows storage of electric charges
when potential differences (voltages) exist between the
conductor. (measured in farads (F))
Inductance
The property of an electrical conductor carrying either ac or
varying dc current to oppose any change in that current flow due
, to to the electromagnetic field set up around that conductor.
(henry)
Impedance
In ac circuits, the total opposition to current flow (Z).
Characteristic Impedance
Input impedance of a uniform transmission line of infinite length
One ohm of resistance will allow 1A (Amp) of current to flow
when 1 ____ of electrical pressure is applied.
volt
Resistance
The property of a conductor to resist the flow of electricity through
it. (expressed in ohms)
Largest Size Guage
4/0 AWG = 460mil
Smallest Size Guage
56 AWG = 0.5mil
A guage change of six numbers, doubles or halves the
conductor's...
diameter
A guage change of three numbers, doubles or halves the...
- conductor's cross-sectional area
- conductor's resistance
Larger guange denote..
smaller wires
Smaller guage denote
Larger wires
As frequency increases, capacitive reactance....
Decreases
Unbalanced Capcitance
The capacitance between a conductor and a ground
Mutual Capacitance
The capacitance between two conductors
Causes a voltage difference between two wires when
separated by insulation
Capacitance
