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ETA Fiber Practice Questions with
Complete and Certified Answers
Light is electromagnetic energy with ____ frequency and a ______ shorter wavelength ✔✔Higher then shorter
fiber optics transmission takes place in _____ portion of the light spectrum ✔✔IR
A simple fiber optic System consist of what 4 parts ✔✔Transmitter, fiber optic cable, receiver, connecters
What absolute power is Dbm referenced to ✔✔1 milliwatt
Absolute power in optical fiber is specified as ✔✔Dbm
Attenuation in optical fiber is lowest at what wavelength ✔✔ 1550
What are the three most common wavelength windows used for communication thru optical fibers ✔✔1550, 850, 1300
In North America what year was the first fiber optic telephone system installed ✔✔ 1977
Single-mode fiber optic systems typically use what light source ✔✔Laser diode
Multimode Fiber optic transmitters typically use what two low cost light sources ✔✔Led, VCSEL
The typical numerical aperture for 50/125 I'm optical fiber is ✔✔.
One way to reduce modal dispersion is to ✔✔Use a smaller core
The number of modes in an optical fiber increases as the _____ decreases ✔✔Wavelength
What optical effect is produced by all mechanical interconnections whether mechanical splices or mated connected pairs ✔✔Fresnel Reflections
What are the two most common multimode optical fiber types ✔✔62.5/125 50/
Different wavelengths of light travel at _____ speeds through glass ✔✔Different
The typical diameter for a fiber used in the tight-buffered cables is? ✔✔900 microns
In cordage what color signifies single-mode fiber? ✔✔Yellow
In ANSI/TIA-589-C twelve colors comprise the fiber color code. What are the twelve in order? ✔✔Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua
This fiber is designed be the ISO/IEC 11801 specification. The fibers designated as OM1 and OM2 are generally known as ______ fibers and were designed for use with led light sources ✔✔Legacy multimode
Graded index fiber uses numerous concentric layers of glass to reduce _____ dispersion ✔✔Modal
Which component of the connector is the optical fibers cladding typically bonded to during the assembly process? ✔✔Ferrel
The NEC defines a fiber optic cable that is fire retardant and low smoke as a _____ rated cable ✔✔Plenum
What is the color of commercial (non military) multimode cordage ✔✔Orange
The gel/tape/powder in a loose tube/buffered fiber cable protects the optical fiber from ______ should the sheath or jacket fail ✔✔Water
What does OFNR stand for ✔✔Optical fiber non conductive riser
The NEC considers fiber optic cables which contain non-current carrying conductive members such as metal strength member, metallic vapor barriers, amor or sheath to be _______ cables ✔✔Conductive
What safety forms must be available when chemicals are used ✔✔MSDS
What is the best way to dispose of water fiber ends ✔✔Sealable container properly labeled with "fiber optic waste"
The loss resulting from mates fiber ends that are not perpendicular to the fibers axis and are not lined up with one another due to poor cleave angle is an example of _______ loss ✔✔Extrinsic
Most small form factor connectors use this diameter ferrule ✔✔1.25 mm
The NEC is updated every _____ years ✔✔ 3
If the cable has a metallic members what does the NEC require at termination points ✔✔Bonding/ ground points
What kind of cable kit branches the fibers contained in a loose tube fiber optic into 900 micron outside diameter protective tubes? ✔✔Fan out kits
Most single mode fiber ends are terminated onto factory made _____ and spliced to the fiber cable ✔✔Pig tails
What type of loss can be greatly reduced by using an optically transparent index matching gel having a reference index the same as or very near my that of the optical fibers ✔✔Fresnel reflection
This termination technique depends on the quality of the cleaving tool for optimum performance ✔✔No polish
When installing cable it is recommended that _____ be available for future changes and restorations ✔✔Slack
What is not required with cable management productions ✔✔Specifying fiber types
Light source used to test multimode local area network normally use what type of electro-optical component ✔✔LED & VCSEL
What instrument is used for the visual inspection of fiber optic end faces ✔✔Inspection scope
What is the acronym for laser ✔✔Light amplification stimulated edmissions of radiation
What does OFCR mean ✔✔Optical fiber conductive riser
What are 3 fiber fabrications to making a preform ✔✔Mcvd OVD VAD
What is the diameter of the acrylate coating ✔✔250 microns
There are three types of dispersion what are they ✔✔Modal chromatic waveguide
What component of an optical power meter converts light into electrical energy ✔✔Photodiode
What is the purpose of cladding? ✔✔To insure total internal reflection
Which class of lasers has the highest power and is used for surgery, research, drilling, cutting, welding, and micro machining ✔✔Class 4
Name three advantages of fiber optics vs copper cable ✔✔Security, light weight, small size
What does ETA stand for ✔✔Electricians technicians association
Name 3 ways fiber optics is used today ✔✔Medical, Communications, military
Electrodes in a fusion splicer become rounded or corroded when worn and should be replaced when the arc count reaches ____ or at the interval recommended by manufacture ✔✔1,
What is the ferrule diameter for ST or SC connector ✔✔2.5 mm
What is the first event on an OTDR trace ✔✔Dead zone
What has more bandwidth single mode or multi mode ✔✔Single mode
What does VFL stand for ✔✔Visual fault locator
What test equipment requires periodic and traceable calibrations ✔✔Optical power meter
What is the most important requirement for making a good splice ✔✔Precision cleaving tool
The splicing environment must be kept as______ as possible ✔✔Clean
The Telcordia general recommendation Gr-326 CORE specifications recommends that fiber optic connectors have a repeatability value if not great than ✔✔2db
Panel used to provide a central location for cross connecting monitoring or test fiber is a? ✔✔Patch panel
This product mostly used out side plant applications for splicing a routing of optical cables ✔✔Closure
A microscope will not confirm fiber continuity over short distances true or false ✔✔True
What instrument is used for testing a fiber spends and includes loss per kilometer and total distance of span measurement ✔✔Optical time domain reflectometer
Installers must consider what when installing fiber optic cable ✔✔Building codes
