Maintenance I-II questions with 100%
correct answers graded A+
According to SCTE- and NCTA-recommended trunk system map symbols, fiber-
optic cable is represented by? - correct answer ✔✔Double arrows within a small
circle on a solid line
The forward path signal in a traditional tree-and-branch architecture - correct
answer ✔✔Originates at the headend and is transmitted downstream through
coaxial trunk cable and trunk amplifiers
In an HFC network, - correct answer ✔✔Processing equipment in the headend
converts the forward RF signal to a light signal.
During aerial plant construction - correct answer ✔✔The strand is tensioned so its
sag profile matches that of the overhead utility power lines.
With underground plant construction, - correct answer ✔✔The fiber-optic and
coaxial cables are often placed underground with other utility lines to jointly share
construction costs.
Standby power supplies - correct answer ✔✔Continue providing an output
voltage even during a utility power outage by using a backup power source.
,Centralized power configurations - correct answer ✔✔Provide the advantage of
increased reliability through sharing of expensive backup generators and
sophisticated monitoring equipment among different power realms.
When transmitting broadband signals - correct answer ✔✔In a two-way HFC
network, two or more individual optical fibers are required for each optical node
location.
RF trunk amplifiers - correct answer ✔✔Have attenuator pads, equalizers, and
diplex filters that control and route the RF signals.
Verifying plant reliability includes - correct answer ✔✔Frequency response
sweeping, which is adjusting RF amplifier circuits to amplify all frequencies in the
bandpass spectrum as equally as possible
Which of the following is a requirement in the process for measuring leakage
using a dipole antenna, as required by the FCC? - correct answer ✔✔The antenna
must be placed 3 meters from the system components and 3 meters from the
ground.
Many cable companies require which type of leaks to be fixed? - correct answer
✔✔All types of leaks must be fixed.
According to the FCC, the leakage log should contain which of the following? -
correct answer ✔✔The probable cause of the leakage
, Which of the following FCC required information must a cable system keep on file
for two years? - correct answer ✔✔Annual CLI calculations, regular (quarterly)
monitoring programs, and a list of all channels used in the aeronautical bands
If your leakage detector indicates there is a leak and displays a reading of 14
microvolts per meter (uV/m) when you are 80 feet from a possible leak source,
what is the approximate calculated level of the leak from 10 feet? - correct answer
✔✔112 μV/m.
If a large signal leak is found in the aerial plant, what is a good first step in locating
the leak? - correct answer ✔✔Drive around until an absolute peak is found.
Which of the following best describes demand maintenance procedures with
regard to signal leakage? - correct answer ✔✔The demand maintenance
procedures can improve the CLI measurement results by identifying and
correcting the largest leaks first
When troubleshooting signal leakage in the drop system, what is indicated if all
signs of signal leakage disappear when the ground block is disconnected and
terminated on the side connected to the customer premises? - correct answer
✔✔The backward route from the ground block to the tap can be eliminated as a
source of leakage
Which typical over-the-air signal sources can cause a false alarm with a signal
leakage detector? - correct answer ✔✔Typical sources include aircraft
communication signals and ham, mobile, and government radio broadcasts
correct answers graded A+
According to SCTE- and NCTA-recommended trunk system map symbols, fiber-
optic cable is represented by? - correct answer ✔✔Double arrows within a small
circle on a solid line
The forward path signal in a traditional tree-and-branch architecture - correct
answer ✔✔Originates at the headend and is transmitted downstream through
coaxial trunk cable and trunk amplifiers
In an HFC network, - correct answer ✔✔Processing equipment in the headend
converts the forward RF signal to a light signal.
During aerial plant construction - correct answer ✔✔The strand is tensioned so its
sag profile matches that of the overhead utility power lines.
With underground plant construction, - correct answer ✔✔The fiber-optic and
coaxial cables are often placed underground with other utility lines to jointly share
construction costs.
Standby power supplies - correct answer ✔✔Continue providing an output
voltage even during a utility power outage by using a backup power source.
,Centralized power configurations - correct answer ✔✔Provide the advantage of
increased reliability through sharing of expensive backup generators and
sophisticated monitoring equipment among different power realms.
When transmitting broadband signals - correct answer ✔✔In a two-way HFC
network, two or more individual optical fibers are required for each optical node
location.
RF trunk amplifiers - correct answer ✔✔Have attenuator pads, equalizers, and
diplex filters that control and route the RF signals.
Verifying plant reliability includes - correct answer ✔✔Frequency response
sweeping, which is adjusting RF amplifier circuits to amplify all frequencies in the
bandpass spectrum as equally as possible
Which of the following is a requirement in the process for measuring leakage
using a dipole antenna, as required by the FCC? - correct answer ✔✔The antenna
must be placed 3 meters from the system components and 3 meters from the
ground.
Many cable companies require which type of leaks to be fixed? - correct answer
✔✔All types of leaks must be fixed.
According to the FCC, the leakage log should contain which of the following? -
correct answer ✔✔The probable cause of the leakage
, Which of the following FCC required information must a cable system keep on file
for two years? - correct answer ✔✔Annual CLI calculations, regular (quarterly)
monitoring programs, and a list of all channels used in the aeronautical bands
If your leakage detector indicates there is a leak and displays a reading of 14
microvolts per meter (uV/m) when you are 80 feet from a possible leak source,
what is the approximate calculated level of the leak from 10 feet? - correct answer
✔✔112 μV/m.
If a large signal leak is found in the aerial plant, what is a good first step in locating
the leak? - correct answer ✔✔Drive around until an absolute peak is found.
Which of the following best describes demand maintenance procedures with
regard to signal leakage? - correct answer ✔✔The demand maintenance
procedures can improve the CLI measurement results by identifying and
correcting the largest leaks first
When troubleshooting signal leakage in the drop system, what is indicated if all
signs of signal leakage disappear when the ground block is disconnected and
terminated on the side connected to the customer premises? - correct answer
✔✔The backward route from the ground block to the tap can be eliminated as a
source of leakage
Which typical over-the-air signal sources can cause a false alarm with a signal
leakage detector? - correct answer ✔✔Typical sources include aircraft
communication signals and ham, mobile, and government radio broadcasts
