ETA-I Study Guide (Fiber Optics
Installer Certification) (FOI) Exam
Questions and Answers Graded A+
An optical fiber works based off of a principle known as; - Correct answer-Total
Internal Reflection.
The bending of light as it passes from one transparent material into another which
has a different refractive index is what? - Correct answer-Refraction.
Light is electromagnetic radiation in the wavelength range including visible,
ultraviolet, X-rays and _______________. - Correct answer-Infrared.
What are the three parts of a typical optical fiber? - Correct answer-Core,
Cladding, buffer Coating. (3 C's)
A simple fiber optic system consists of what four components? - Correct answer-
Transmitter, receiver, fiber, and connector.
Which optical fiber is most suited for very high speed and long distance
applications? - Correct answer-Single-mode.
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, The reduction of power as a signal passes through a system is called (Also known
as signal loss); - Correct answer-Attenuation.
A fiber optic cable which has single-mode and multi-mode optical fibers is what
kind of cable? - Correct answer-Hybrid.
A fiber with it's core having numerous concentric layers of glass, with each layer
having a lower index of refraction is what kind of fiber? What is the core size and
how is it identified now? - Correct answer-Multi-mode graded-index.
The spreading of light pulses as they take different paths in traveling down a fiber
is known as what? - Correct answer-Modal Dispersion.
What are the two widely used methods for installing buried fiber optic cables? -
Correct answer-Trench and Plow methods.
What configurations should be used when the center pull or backfeeding
techniques are used to pull in cables? - Correct answer-Figure 8's.
During the installation of fiber optic cables, innerduct serves what two main
purposes? - Correct answer-Expansion and Protection.
Two basic methods used for installing lashed aerial cables are; - Correct answer-
Stationary reel (pull-in) and moving reel (drive-off).
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Installer Certification) (FOI) Exam
Questions and Answers Graded A+
An optical fiber works based off of a principle known as; - Correct answer-Total
Internal Reflection.
The bending of light as it passes from one transparent material into another which
has a different refractive index is what? - Correct answer-Refraction.
Light is electromagnetic radiation in the wavelength range including visible,
ultraviolet, X-rays and _______________. - Correct answer-Infrared.
What are the three parts of a typical optical fiber? - Correct answer-Core,
Cladding, buffer Coating. (3 C's)
A simple fiber optic system consists of what four components? - Correct answer-
Transmitter, receiver, fiber, and connector.
Which optical fiber is most suited for very high speed and long distance
applications? - Correct answer-Single-mode.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, The reduction of power as a signal passes through a system is called (Also known
as signal loss); - Correct answer-Attenuation.
A fiber optic cable which has single-mode and multi-mode optical fibers is what
kind of cable? - Correct answer-Hybrid.
A fiber with it's core having numerous concentric layers of glass, with each layer
having a lower index of refraction is what kind of fiber? What is the core size and
how is it identified now? - Correct answer-Multi-mode graded-index.
The spreading of light pulses as they take different paths in traveling down a fiber
is known as what? - Correct answer-Modal Dispersion.
What are the two widely used methods for installing buried fiber optic cables? -
Correct answer-Trench and Plow methods.
What configurations should be used when the center pull or backfeeding
techniques are used to pull in cables? - Correct answer-Figure 8's.
During the installation of fiber optic cables, innerduct serves what two main
purposes? - Correct answer-Expansion and Protection.
Two basic methods used for installing lashed aerial cables are; - Correct answer-
Stationary reel (pull-in) and moving reel (drive-off).
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
