1 | Page
NCTI Fiber Testing & Maintenance
Questions and Correct Answers/ Latest
Update / Already Graded
What type of interface is common on new-generation optical
meters?
Ans: USB
Optical power meters used for testing FTTx installations operating
downstream from the headend should be calibrated for which
wavelengths?
Ans: 1490, 1550, and 1577
Besides a stabilized light source, an enhanced optical power meter,
and an optical talk set, what else do optical loss test sets include in
their combined features?
Ans: An ORL meter
,2 | Page
What do most optical power meters require when measuring
transmit and receive power?
Ans: Annual calibration that is traceable to the NIST
What must be done first when measuring end-to-end attenuation
using the optical power meter?
Ans: The light source and optical power meter must be referenced
together before taking measurements
What do most models of laser light sources use as operational status
indicators?
Ans: Controls for turning the light source on and off, selecting the laser
wavelength for testing, and selecting the modulation signals; display
indicators for the selected wavelength, mode of operation, battery status,
and power source.
What occurs when a laser light source is used with an optical fiber
identifier to test fibers?
, 3 | Page
Ans: A 2-kHz modulation provides a test signal allowing the fiber under
test to be detected by the optical fiber identifier.
Besides determining whether the light is on fiber and the light is
modulated and carrying traffic, what does is the third function the
optical fiber identifiers determine?
Ans: The direction from which the light is coming.
Which of the following statements is accurate regarding laser light
source specifications?
Ans: Standard environmental specifications for laser light sources range
from 13°F to 130°F for operating temperatures and - 19°F to 158°F for
storage temperatures.
What visually represents the optical fiber's attenuation characteristics
and the OTDR setup?
Ans: The waveform
NCTI Fiber Testing & Maintenance
Questions and Correct Answers/ Latest
Update / Already Graded
What type of interface is common on new-generation optical
meters?
Ans: USB
Optical power meters used for testing FTTx installations operating
downstream from the headend should be calibrated for which
wavelengths?
Ans: 1490, 1550, and 1577
Besides a stabilized light source, an enhanced optical power meter,
and an optical talk set, what else do optical loss test sets include in
their combined features?
Ans: An ORL meter
,2 | Page
What do most optical power meters require when measuring
transmit and receive power?
Ans: Annual calibration that is traceable to the NIST
What must be done first when measuring end-to-end attenuation
using the optical power meter?
Ans: The light source and optical power meter must be referenced
together before taking measurements
What do most models of laser light sources use as operational status
indicators?
Ans: Controls for turning the light source on and off, selecting the laser
wavelength for testing, and selecting the modulation signals; display
indicators for the selected wavelength, mode of operation, battery status,
and power source.
What occurs when a laser light source is used with an optical fiber
identifier to test fibers?
, 3 | Page
Ans: A 2-kHz modulation provides a test signal allowing the fiber under
test to be detected by the optical fiber identifier.
Besides determining whether the light is on fiber and the light is
modulated and carrying traffic, what does is the third function the
optical fiber identifiers determine?
Ans: The direction from which the light is coming.
Which of the following statements is accurate regarding laser light
source specifications?
Ans: Standard environmental specifications for laser light sources range
from 13°F to 130°F for operating temperatures and - 19°F to 158°F for
storage temperatures.
What visually represents the optical fiber's attenuation characteristics
and the OTDR setup?
Ans: The waveform
