Copyright © OLIVIAWEST2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
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
Copyright ©Stuvia International BV 2010-2024 Page 4/40
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
Copyright ©Stuvia International BV 2010-2024 Page 1/40
, Copyright © OLIVIAWEST2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
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
Copyright ©Stuvia International BV 2010-2024 Page 2/40
, Copyright © OLIVIAWEST2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
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
Copyright ©Stuvia International BV 2010-2024 Page 3/40
, Copyright © OLIVIAWEST2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
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
Copyright ©Stuvia International BV 2010-2024 Page 4/40
