11/27/13 NT1310 Final Exam Jeopardy Review Game Answer Key

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NT1310 Final Exam Answer Key

Optical Connectors and Splices

#1 What is a fiber-optic microscope used for when installing a connector on a fiberoptic cable?

Detecting dirty, cracked or scratchedconnectors

#2 Why would you choose mechanical splicing over fusion splicing? Initial setup cost

#3 Which type (or types) of mismatches can affect how well a splice performs?a)Core diameter b) Heat index c)Mode field diameter d)both a and c

Both A and C (Core diameter and Mode fielddiameter)

#4 What 3 parts make up a fiber optic receiver? Recpetacle, optical subassembly, electricalsubassembly

#5 Which of the following cables are commonly used in connections to equipmentand patch panels? a) Distribution cables b)Breakout cables c)Messenger cablesd)Cordage

Cordage

Cable Testing

#1 What can a visual fault indicator help you determine? Breaks, Macrobends, poor fusion splices

#2 What other tool do you need when working with an optical power meter? Light source

#3 How are optical fibers and copper different? Both can send digital data, both are used forcommunication, optical fibers are noteffected by EMI

#4 What types of things should you include when documenting the results of yourOTDR testing?

Number/ Id of the the cable, test procedurenumber, pulse width, wavelength, model ofOTDR, dead/launch zone specs

#5 What are some sources of crosstalk? Not enough twisting, inferior components,shoddily made patch cables, poor sheilding

Fiber Optic Basics

#1 Name some of the parts that make up an optical fiber. Core, cladding, jacket, sheath, coating,jacket, strength members

#2 Name some common strength member materials used in fiber optics. Aramid yarns/ Kevlar, steel, fiberglass rods

#3 How does dispersion affect optical fiber? Blurs the digital signals together anddegrades the distinct pulses of light making itunreadable

#4 What does the numerical aperture (NA) express? The light gathering ability of the fiber

#5 Which of these are used to make optical fiber? a) Vapor axial deposition b)

Plasma moderated composition c) Modified chemical vapor deposition d)

Microwave induced matrix deposition

Modified chemical vapor deposition and

Vapor axial deposition

Installation and Troubleshooting

#1 What effect does EMI have on fiber-optic cable? None

#2 What is tensile strength? Resistance to stretching

#3 What is the purpose of an optical filter? Selectively permits transmission or blocksout a range of wavelengths

#4 Name 3 kinds of cable types used in a FTTX Passive Optical Network( PON). Drop cable, distribution cable, feeder cable

#5 Name some components to a passive optical network. Grid isolation hub, optical attentuator, opticaleye to eye coupler, optical filter

RFP and Safety

#1 Name some ways to safely round up loose fiber after cleaving. Use a mat, create a barrier around your work

11/27/13 NT1310 Final Exam Jeopardy Review Game Answer Key

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#1 Name some ways to safely round up loose fiber after cleaving. Use a mat, create a barrier around your workarea, use tweezers, use double sided tape topick them up.

#2 In the event of an emergency, what should your first response be on a job site? Remain calm

#3 What are some safety precautions you need to take when working around lasersand fiber optics?

Wear protective eyewear, hazardous laserareas should be labeled with warning signs,assume that a fiber has a light source (eventhough it is invisible)

#4 List some items that are necessary on a Request for Proposal. Details on the work area, components of thecabling infrastructure, the desired outcomes,input from other stakeholders

#5 What are some important things during the vendor selection phase aftersubmitting an RFP?

Making sure the vendor has the propercertifications, balance out cost/performanceand customer support in a vendor, referenceson past jobs that are similar

Final Question

Define a microbend in a fiber optic cable, and how can they be caused? Small distortions in the boundary layerbetween the core and the cladding. They canbe caused by the packaging of the cable.