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Fiber Optic Cable Installation and Testing, Exams of Computer Networks

Chamberlain College of NursingComputer Networks

A comprehensive overview of fiber optic cable technology, including the conversion of copper networks to fiber, the advantages of optical fiber, the types of fiber optic cables, the termination and splicing of fiber optic cables, and the testing and troubleshooting of fiber optic systems. It covers topics such as fiber optic cable construction, light sources, connectors, splices, loss budgets, test equipment, and safety considerations. Likely intended for professionals involved in the installation, maintenance, and troubleshooting of fiber optic communication systems, providing detailed technical information and best practices. It could be useful for university students studying telecommunications, electrical engineering, or computer networking, as well as for lifelong learners interested in understanding the latest developments in fiber optic technology.

Typology: Exams

2024/2025

Available from 10/05/2024

TheHub
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JATC Fiber Optics Final Exam Questions and
Answers 2025/2026
Fiber optics is used in cars to connect their electronic systems.
True
Copper networks can be converted to fiber optics using _____.
Media converters
Telephone networks have been converted to fiber, including long distance and metropolitan
networks, but fiber to the home (FTTH) is not yet feasible.
False
Which of the following communication systems typically use fiber-optic backbones?
- CATV
- Cell phones
- Telephones
- Internet
In an industrial environment, fiber is most often used to _____.
Prevent electromagnetic interference
An advantage of optical fiber is the fact that it is the most cost effective means of transporting
information over long distances.
True
The bandwidth and distance capability of optical fiber means that _____.
- Less maintenance is required
- Fewer repeaters are needed
- Fewer cables are needed
- Less power is consumed by the network
The protective gear every voice/data/video (VDV) installer must always wear is _____.
Eye protection
Information on the safety of chemicals used in fiber optics are _____.
In MSDS supplied by the manufacturer.
Inspection microscopes can concentrate the light from a fiber into your eye causing serious
damage.
True
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Download Fiber Optic Cable Installation and Testing and more Exams Computer Networks in PDF only on Docsity!

JATC Fiber Optics Final Exam Questions and

Answers 2025/

Fiber optics is used in cars to connect their electronic systems. True Copper networks can be converted to fiber optics using _____. Media converters Telephone networks have been converted to fiber, including long distance and metropolitan networks, but fiber to the home (FTTH) is not yet feasible. False Which of the following communication systems typically use fiber-optic backbones?

  • CATV
  • Cell phones
  • Telephones
  • Internet In an industrial environment, fiber is most often used to _____. Prevent electromagnetic interference An advantage of optical fiber is the fact that it is the most cost effective means of transporting information over long distances. True The bandwidth and distance capability of optical fiber means that _____.
  • Less maintenance is required
  • Fewer repeaters are needed
  • Fewer cables are needed
  • Less power is consumed by the network The protective gear every voice/data/video (VDV) installer must always wear is _____. Eye protection Information on the safety of chemicals used in fiber optics are _____. In MSDS supplied by the manufacturer. Inspection microscopes can concentrate the light from a fiber into your eye causing serious damage. True

Bright red visible light is produced by a VFL that is safe to look at directly at the end of the fiber. False A digital camera can see infrared light, so it can be used to determine if there is light present in a fiber. True Dangerous light from fiber optic cables is bright and easily visible. False During fiber optic installations, the most common danger is caused by _____. Fiber scraps or shards by cleaving, splicing, and termination. If you inspect a fiber optic connector that is connected to a laser source with a microscope, you will experience a high level of pain while your eye is damaged. False What are some potential hazards associated with the use of cleaning solvents that are sometimes used when working with fiber optics?

  • Vapors
  • Skin irritation To ensure that you are using proper protective eyewear, look for the _____ mark on your glasses.
  • ANSI Z Proper eyewear should include _____ for maximum protection from flying debris.
  • Side shields SM fiber has a _____ light-carrying core than multimode (MM) fiber.
  • Smaller What is the core size of SM fiber? 9 microns The wavelength of light used for most fiber-optic systems is in the _____ region and _____ to the human eye.
  • Infrared
  • Invisible Multimode fiber has a larger core than single mode fiber measuring _____ microns in diameter.
  • 50 or 62.5 microns in diameter In an optical fiber, the light is transmitted through the _____.
  • Core Rays of light transmitted in multimode fiber are called _____.
  • Modes The cladding of the fiber is stripped off the fiber when terminating. False What type of fiber optic cable would be used with a LED light source?

Scattering _____ quickly at longer wavelengths.

  • Decreases The largest contributor to fiber attenuation is _____.
  • Scattering At specific wavelengths, _____ occurs a high levels.
  • Absorption What are the two main factors that cause attenuation in fiber optics? Scattering and absorption The design of _____ MM fiber compensates for modal dispersion.
  • Graded index _____ light sources have a broad spectrum, suffering more chromatic dispersion than _____ light sources.
  • LED
  • Laser Which type of dispersion affects SM fiber as well as MM fiber? Chromatic The speed of light varies with wavelength, which causes _____.
  • Chromatic dispersion SM fiber has _____ bandwidth than MM fiber.
  • More The _____ of a laser makes the effective bandwidth of MM fiber higher than LEDs.
  • Restricted launch What is caused by varying speeds in each mode in multimode fiber?
  • Modal dispersion Fiber bandwidth is limited by _____.
  • Dispersion The proper method of pulling optical fiber cables is to attach the pull wire or tape to the _____ of the cable.
  • Strength members Which type of cable is best suited for indoor installation when fibers are to be directly terminated inside a patch panel with adhesive/polish or pre polished splice connectors?
  • Distribution tight buffer cable What absorbs the tension needed to pull fiber optic cable and provides cushioning for the fibers? Aramid yarn strength members What provides additional protection to the fiber and allows for easier handling and direct termination to the fiber? 900 micron tight buffer coating

The first layer of protection of a fiber optic cable is the _____. 250 micron primary buffer coating Which of the following cables would be used for patch cord and backplane applications? Zipcord cable What type of cable is a favorite where rugged cables are desirable or direct termination without junction boxes, patch panels, or other hardware is needed? Break-out cable What type of cable may require installation of a breakout kit (also called a furcation or fan out kit) for termination? Loose tube cable What type of cable withstands crush loads well, protects against rodents, and can be directly buried? Armored cable What type of cable is most widely used for outside plant (OSP) trunks because it offers the best protection for the fibers under high pulling tensions and can be easily protected from moisture with water-blocking gel or tapes? Loose tube cable In a loose tube cable, a gel or absorbent tape or powder is normally used _____.

  • To prevent water from entering the cable Fiber optic cable for use inside a building must be _____.
  • Rated to meet the requirements of local building and fire codes What type of fiber cable design allows for large numbers of fibers with ultra-high density, small size (diameter) and low cost? Ribbon cable Premises cable jackets are usually color-coded in what color to indicate laser-optimized 50/ OM3 or OM4 fiber? Aqua Hybrid cables are cables that contain both _____.
  • SM and MM fiber Composite cables refer to cables that contain both _____.
  • Optical fibers and copper conductors What connector color typically identifies an SM APC? Green The SC and LC connectors have different size ferrules and cannot be mated. True The difference between a fiber-optic connector and a splice is _____.
  • Connectors are demountable, splices are permanent

The manufacturing process of pre-polished connectors is complex and requires extra care, so these connectors are as much as 10 times the amount of an adhesive-and-polish type. True What type of splice uses an electric arc to splice two fibers together? Fusion splice If you need to permanently join two fibers together with the lowest loss and least amount of reflectance, which of the following should you choose? Fusion splice Mass fusion splicing is normally used on what style of cable? Ribbon cable Most singlemode (SM) field terminations are made by fusion splicing a factory-made pigtail onto the cable. True The most accurate and durable method of joining optical fibers is _____.

  • Fusion splicing What type of splice utilizes index matching gel to minimize loss between two fibers? Mechanical splice For mechanical splices, it's important to apply _____ on the fiber to keep the ends together while crimping.
  • Light pressure What is the most common application for mechanical splicing? Temporary restoration When performing mechanical splices, what could be used during the splicing process to yield more consistent and lower loss splices? Cleaver What can be used to optimize a mechanical splice for low loss? Visual Fault Locator The link loss budget analysis of a cable plant should be done to _____, _____, and _____.
  • Ensure the intended communications system will work on the cable plant system
  • Provide a pass/fail loss value for comparison to test values
  • Ensure the cable plant has been properly installed In a basic fiber optic system, the transmitter converts a _____ signal into a _____ signal.
  • Electrical
  • Optical The amount of optical power lost as light is transmitted through fiber, splices, and couplers is defined as _____.
  • Optical loss

Connectors at each end of the cable plant should not be counted when calculating the cable plant loss. False What component can convert an electrical signal to or from an optical signal? Tranceiver Fiber optic links generally use two fibers for full duplex (bidirectional) links. True A fiber optic power meter measures absolute power in dBm (dB referenced to 1 mw) and, when used with a light source, can measure insertion loss expressed in dB. True A visible light source (LED or flashlight) used to visually check fiber continuity and location of faults is called a _____.

  • Fiber tracer What is used to inspect the end surface of a connector for faults such as scratches, polish, or dirt? Inspection microscope What fiber optic test simulates actual system operation? Optical Loss Test Set (OLTS) What test instrument(s) are used for insertion loss testing? OLTS or power meter and light source Inspection of fibers with an Interferometer is a common field test of fiber optics that is done before plugging into equipment. False Connector "dust caps" can transfer dirt onto a fiber optic connector. True The infrared light coming out of a fiber optic cable is invisible, but if you look at it through a cell phone camera it is visible. True A fiber optic inspection microscope can increase the danger of high powered light sources by focusing the light coming out of a fiber into your eye. True The standard method of testing installed MM cables in a cable plant is described in _____.
  • OFSTP- 14 Cable plant loss should be estimated during the _____ phase.
  • Design Prior to cable plant acceptance or system turn-up, a _____ is used to measure the cable plant insertion loss to ensure it is within the loss budget.

Which network component switches connections between devices on the network? Switches What type of network architecture consists of all network devices/users connected to a central point that switches or connects them to whomever they want to communicate with? Star topology What type of network architecture utilizes connections that "tap" into a cable that is usually coax? Bus topology The Internet is an example of what type of network architecture? Mesh topology Telephone systems and LAN's commonly use ____ networks.

  • Star The essence of any network is that the network shares connections and thereby shares the available _____.
  • Bandwidth What network device replaced a hub, making full duplex data transfer possible? Switches What caused bandwidth to be limited on bus networks when too many users were using it at the same time? Collisions