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Comcast Tech Training Exam Practice Questions and Answers
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Comcast Tech Training Exam Practice Questions and Answers What is a radio wave? - ANSWER-A radio wave is an electromagnetic wave that has been produced by a transmitter. Which analog TV channels are adjacent to each other by channel name but not in frequency? - ANSWER-Channels 4 and 5, and cha...

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  • November 10, 2024
  • 40
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • comcast tech training exam practice questions and

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Comcast Tech Training Exam Practice

Questions and Answers


What is a radio wave? - ANSWER✔✔-A radio wave is an electromagnetic wave that has been produced


by a transmitter.


Which analog TV channels are adjacent to each other by


channel name but not in frequency? - ANSWER✔✔-Channels 4 and 5, and channels 6 and 7


What is attenuation and insertion loss? - ANSWER✔✔-Attenuation is the difference in RF energy

between two points. It is


measured in decibels. Insertion loss is a drop in signal level that


occurs when a passive device is inserted into the coax.


Name some factors that cause cable attenuation. - ANSWER✔✔-Factors that affect coax attenuation:


i. Devices spliced into the drop


ii. Frequency of the carrier


iii. Temperature


iv. Length and gauge of the coax


Identify the devices that significantly increase passive loss, if




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they are faulty, or have been inserted incorrectly. - ANSWER✔✔-Devices that significantly increase

passive loss, if they are faulty,


or have been inserted incorrectly, are:


i. Splitters


ii. Directional couplers


iii. Drop taps


iv. POE filter


v. Barrel splice


What is the difference between dB and dBmV? - ANSWER✔✔-dB is a relative logarithmic unit. It often

refers to a change, such as


"the level increased by 3 dB." dBmV however is an absolute


measurement of signal level. An absolute signal is something that


can be measured with your meter.


List some of the uses of coaxial cable. - ANSWER✔✔-Uses of coaxial cable:


i. Used in transporting radio signals


ii. Used in data, voice, and television communication, where RF


energy is used as the transport medium


What is the preferred method of coax cable routing? Why? - ANSWER✔✔-The best method of coax cable

routing is the home run. It is


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dedicated to each outlet, allowing greater flexibility and


management of RF. It provides greater reliability as a fault in any


one run will not impact other outlets.


How can ingress affect Comcast? - ANSWER✔✔-Ingress can:


i. Affect the quality of our services; it may even cause a major


disruption


ii. Cause an excessive number of customer complaints


The root cause of the ingress may also be a source of egress or


signal leakage.


What are the sources of signal leakage? - ANSWER✔✔-The sources of signal leakage are:


i. Poorly constructed or loose F-connectors in the drop


ii. Staples or sharp objects piercing the cable jacket


iii. Abrasion from mortar, brick, or metal structures


iv. Poor quality or inferior coax installed into the drop by a third


party


v. Cable that has been chewed on by rodents or dogs


vi. Loose POE filter, or an improperly installed terminator


vii. Antenna cable accidentally connected at the Comcast splitter




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The features offered by XFINITY On Demand are: - ANSWER✔✔-i. Watch favorite movies and TV shows

anytime and anywhere on


TV and online, on the tablet or smartphone


ii. Select from a wide selection of movies and TV series


iii. Stop a TV show or movie and watch it later


iv. On-screen guide search capabilities


v. Parental controls


vi. AnyRoom DVR and On Demand


The benefits of the XFINITY TV HD service are: - ANSWER✔✔-i. More HD Choices than Satellite


ii. More than 8,000 HD choices available On Demand


iii. Access to STARZ® HD movies On Demand, before their


network premieres


iv. No additional HD programming fees


The benefits of XFINITY Internet are: - ANSWER✔✔-i. Fast speeds even with the whole family online


ii. Share music and upload photos in the blink of an eye


iii. Play games online with less latency


iv. Constant Guard and XFINITY Connect provided


Some of the features of XFINITY Voice are: - ANSWER✔✔-i. 3-Way Calling


ii. Anonymous Call Rejection

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