ETA Fiber FOI part 1 Questions with 100%
Correct Answers
A _____________ is used with an overfilled light source when testing loss in a
multimode fiber and is placed on the ____________ MQJ.
Mandrel Wrap
Light Source
Back reflections from a mechanical interconnection can interfere with the operation of a
__________________.
singlemode laser
Checking the power at the _________________ should be the first test that is done when
troubleshooting a network problem.
receiver
Multiple channels carrying digital signals on the same fiber is an example of
_____________________.
multiplexing
______________________ dispersion affects both singlemode and multimode fibers.
Chromatic material
Tensile strength is the ability of a fiber to be pulled without breaking. (True/False)
True
Which of the following is a workable solution to combat Chromatic Dispersion?
a) Reduce cable length
,b) Reduce light source spectral width
c) Reduce light source wavelength
d) Reduce light source power
b) Reduce light source spectral width
The NEC considers an installed fiber optic cable this is not terminated at equipment
other than a connector an not tagged for future use as a(an) _____________ cable.
abandoned
Find the link attenuation allowance for a fiber link that is 700 meters in length, has 3
matted pairs, and 2 splices with a 1300nm transmitter.
a) 3.90dB
b)4.55dB
c) 3.60dB
d) 3.00dB
a) 3.90dB
Tier 1 testing accomplishes insertion loss, cable length, polarity verification, and overall
fiber link attenuation and reflectance loss at connectors and splices. (True/False)
True
A mechanical splice will be identified on an OTDR trace as a _______________ event.
reflective
A fusion splicer creates a permanent splice when the optical fiber is melted together by
an electric arc between a pair of electrodes. (True/False)
,True
An optical attenuator is a passive device that is used to reduce the
_____________________ of an optical signal.
power level
Fusion splices are most likely used in the middle of a _________ fiber run.
long
A light source and power meter are connected together with two MQJ's. The reference
power on the power meter is -15.3dBm. A 200 meter cable is inserted between the
MQJ's and the measured power on the meter now reads -17.5dBm. the loss would be
________.
2.2
There are _________ individual fiber, unit, and group identification color codes
recognized by the Optical Fiber Cable Code standard TIA-598.
a) 24
b) 36
c) 48
d) 144
b) 36
__________________ is the proper name for the modulation scheme used to convert
analog signals to a digital format.
Pulse coded modulation
, Return reflection or return loss can be reduced by _______________ the connector
endface with a PC finish.
a) Squaring
b) Rounding
c) Flattening
d) Beveling
b) Rounding
For light to propagate down the fiber core, it must enter through the _____________
which is defined by the __________________.
cone of acceptance
NA - light gathering ability of the fiber
According to ANSI/TIA-568, the minimum (optical) return loss allowed for mated pair
is ___(a)_____dB for MM fiber, _____(b)_____ dB for SM fiber, and ___(c)______dB
for SM(CATV).
a) 20
b) 26
c) 55
A _______________ is used to detect light propagating down a fiber by utilizing the
effect of a non-destructive macro bend.
fiber identifier
The Mode Field Diameter measures the diameter of the ________ in a singlemode fiber.
Correct Answers
A _____________ is used with an overfilled light source when testing loss in a
multimode fiber and is placed on the ____________ MQJ.
Mandrel Wrap
Light Source
Back reflections from a mechanical interconnection can interfere with the operation of a
__________________.
singlemode laser
Checking the power at the _________________ should be the first test that is done when
troubleshooting a network problem.
receiver
Multiple channels carrying digital signals on the same fiber is an example of
_____________________.
multiplexing
______________________ dispersion affects both singlemode and multimode fibers.
Chromatic material
Tensile strength is the ability of a fiber to be pulled without breaking. (True/False)
True
Which of the following is a workable solution to combat Chromatic Dispersion?
a) Reduce cable length
,b) Reduce light source spectral width
c) Reduce light source wavelength
d) Reduce light source power
b) Reduce light source spectral width
The NEC considers an installed fiber optic cable this is not terminated at equipment
other than a connector an not tagged for future use as a(an) _____________ cable.
abandoned
Find the link attenuation allowance for a fiber link that is 700 meters in length, has 3
matted pairs, and 2 splices with a 1300nm transmitter.
a) 3.90dB
b)4.55dB
c) 3.60dB
d) 3.00dB
a) 3.90dB
Tier 1 testing accomplishes insertion loss, cable length, polarity verification, and overall
fiber link attenuation and reflectance loss at connectors and splices. (True/False)
True
A mechanical splice will be identified on an OTDR trace as a _______________ event.
reflective
A fusion splicer creates a permanent splice when the optical fiber is melted together by
an electric arc between a pair of electrodes. (True/False)
,True
An optical attenuator is a passive device that is used to reduce the
_____________________ of an optical signal.
power level
Fusion splices are most likely used in the middle of a _________ fiber run.
long
A light source and power meter are connected together with two MQJ's. The reference
power on the power meter is -15.3dBm. A 200 meter cable is inserted between the
MQJ's and the measured power on the meter now reads -17.5dBm. the loss would be
________.
2.2
There are _________ individual fiber, unit, and group identification color codes
recognized by the Optical Fiber Cable Code standard TIA-598.
a) 24
b) 36
c) 48
d) 144
b) 36
__________________ is the proper name for the modulation scheme used to convert
analog signals to a digital format.
Pulse coded modulation
, Return reflection or return loss can be reduced by _______________ the connector
endface with a PC finish.
a) Squaring
b) Rounding
c) Flattening
d) Beveling
b) Rounding
For light to propagate down the fiber core, it must enter through the _____________
which is defined by the __________________.
cone of acceptance
NA - light gathering ability of the fiber
According to ANSI/TIA-568, the minimum (optical) return loss allowed for mated pair
is ___(a)_____dB for MM fiber, _____(b)_____ dB for SM fiber, and ___(c)______dB
for SM(CATV).
a) 20
b) 26
c) 55
A _______________ is used to detect light propagating down a fiber by utilizing the
effect of a non-destructive macro bend.
fiber identifier
The Mode Field Diameter measures the diameter of the ________ in a singlemode fiber.
