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Fiber Optic Questions and Answers
Rated A+
The figure represents a typical cross section of multimode fiber. The cladding is represented by which letter
B
Which element in loose tube fiber optic cable structure prevents water intrusion onto fiber?
Gel/Tapes/Powders
When using dBm. power levels_______ are negative values, for example -3dBm
1mW
All connectors should be _____ prior to mating.
Cleaned
The OM5 designation describes______.
Wideband Multimode Fibers
When chemicals are used which forms must be available?
SDS or MSDS
Installers must consider which of the following when installing fiber optic cables inside a building?
NEC or CEC Codes
Light sources used to test multimode Enterprise Networks normally use what type of electro- optic components?
LED
What instruments is used for testing of fiber spans and includes Loss per kilometer and total distance of span measurement?
Optical Time Domain Reflectometer
The maximum insertion loss for a mated connector pair is specified as _____ in ANSI/TIA- used for commercial buildings.
0.75 dB
Improper bending of an optical fiber cable may cause_____.
Macrobending Losses
When preparing to install a fiber optic cable in conduit you must be aware of the maximum ___ percentage by cross-section area as defined in the NEC.
Fill Ratio
Reflectance is the ratio of reflected power to incident power and it typically expressed in.
dB
Bend Insensitive
What is the name of indoor light-buffer "non-breakout" style cable?
Distribution
Is used to describe attenuation in an optical fiber.
dB
Most single-mode fiber are terminated with factory fabricated____.
Pigtails
The maximum splice value is ____ as specified by the TIA 568-C and TIA 758 standards.
.3 dB
Which of the following multimode fiber has the highest bandwidth?
OM
Which government agency writes and enforces safety rules for the workplace?
OSHA
A ____ provides a means to connect horizontal (cabling subsystem 1) or backbone (cabling subsystem 2) cable to an arrangement of fixed connectors.
Patch Panel
What Tier test level requires optical loss testing and polarity verification?
Tier 2
Fiber geometry is an example of ____ tolerance.
Intrinsic
What is the "mode" in optical fiber?
A Light Path
In ANS/TIA-598. Twelve colors comprise the fiber color code. Int the following partial list, complete the sequence if missing colors: 1._____ 7. Red 2._____ 8. Black 3.Green 9. Yellow 4.Brown 10. Violet 5.Slate 11. _____ 6._____ 12. Aqua
Blue, Orange, White, Rose
Which type of connector cited in the ANSI/TIA-568 standard is shown in the picture?
MPO/MTP Array
Fiber Optic transmission takes place in the ____ portion of the spectrum.
Infrared
The 62.5/125 um fiber is specified by ISO/IEC 11801 and designed by ____.
A covered container clearly marked for fiber optic waste
If the cable has metallic member, what does the NEC require at termination points?
Bonding to ground
Which product could be used to reduce the number of high order modes when testing multimode fibers?
Mandrel Wrap
Which wavelength below is ideal for use with a VCSEL (Vertical Cavity Surface Emitting Laser)?
850 nm
Which of the cable's markings are used in determining the length of the cable?
Sequential
Which element of the fiber optic cable is the optical fiber ferrule typically bonded to during the assembly process?
Cladding
Different wavelengths of light travel at ____ speeds through the glass.
Different
What is the purpose of having cable slack in the fiber plant?
Moves, Adds, Changes
As the ____ decreases, the number of modes in an optical fiber increase.
Wavelength
The color-coding used on premises cable jackets, as defined in ANSI/TIA-598, typically indicates the type of fiber contain. Which of the following types of multimode optical fiber listed would be contained in a cable bound in an aqua jacket?
50/125 umLaser-optimized
What color strain relief should be used laser-optimized optical fiber?
Aqua
Patch panels used bulkhead mounted mating sleeves or adaptors to make _______.
Interconnections
What are the two most common multimode optical fiber types?
50/125 and 62.5/125 um
Most indoor tight buffer cables have a buffer typically _____ in diameter and it is applied to the outer layer of the optical fiber.
900 microns
One of the recognized connectors cited in the ANSI/TIA-568 standard is shown in the picture below. What type is it?
MPO/MTP Array
What term below is used to define a ratio expressed in a dB of the power of the outgoing signal to the power of the reflected signal?
Reflectance
NEC Article 770 states in part that unlisted conductive and nonconductive outside plant optical fiber cable shall be in the building..(structure)... Where the length of the cable within the bulding , measure from its point of entrance, does not exceed ____ and the cable enters the building from the outside and is terminated in an enclosure.
15 m (50 feet)
Which of the following cables kits takes the fiber contained in a loose tube fiber optic cable and branches into 250 micron outside diameter protective tubers?
Fan-Out Kits
To achieve a good cleave it is essential that the scoring blade in a cleaver be held ____ to the optical fiber.
Perpendicular
Article 250 of the NEC requires that any electrically conductive material that are likely to become energized, like metal armor and/or metal strength members of an optical fiber cable, shall ___ at the point of entrance into a building or residence.
Be Bonded and Grounded
