Progression Construction Coordinator I - II Newest 2024 Actual Exam
Questions and Correct Detailed Answers.
Monitoring the status of optical nodes - answer-Involves the use of a node transponder that continuously
monitors a number of critical functions.
Digital return path transmissions - answer-Use DWDM
Dense wavelength division multiplexing
digital return transmitters in hub-to-headend architectures.
Broadband cable operators provide customers with HSD High-speed data connections to the Internet via their
HFC networks using what standard? - answer-DOCSIS
What is MPEG? - answer-A universally accepted standard for digital television, first released in 1992.
Which of the following is true about optical nodes? - answer-They contain four main sections: the optical
receiver, the RF amplifier module, the reverse optical transmitter, and the DC power supply.
What product based on the DOCSIS defines the protocols for IP telephony over HFC? - answer-PacketCable
In a centralized server VOD architecture, - answer-The number of servers needed for video content storage is
smaller than in the distributed server architecture.
Which of the following statements about local ad insertion is true? - answer-Local ad insertion is performed
usually by a video server.
In regard to providing HSD service, - answer-The CMTS
Cable modem termination system
can provide a data transfer rate up to 38 Mbps, using 256-QAM in a single 6 MHz channel.
Which of the following is true about the SONET standard? - answer-SONET is the North American standard
used for telephony applications.
,Compared to a solid copper center conductor, which property about a copper clad aluminum (CCA) center
conductor is correct? - answer-The CCA center conductor has almost equal attenuation at high frequencies.
In hardline coaxial cable, what is the most common dielectric material? - answer-Foamed polyethylene
produced by gas injection.
In aerial installations, why do cable manufacturers recommend that expansion loops be formed in hardline
coaxial cable? - answer-To allow movement of the cable when lashed to the strand
Why was the impedance for the broadband cable industry standardized at 75 ohms (Ω)? - answer-At 75 Ω
characteristic impedance, the coaxial cable has minimal attenuation, with adequate breakdown voltage and
power carrying capacity.
What is the coaxial cable velocity of propagation (VoP)? - answer-The rate that radio frequency (RF) signals
travel through the coaxial cable versus the speed that RF signals travel in a vacuum or free space.
If the attenuation through a 100 ft. span of 0.750 MC2 coaxial cable is 2.5dB at 75 MHz, what will be the
approximate attenuation at 300 MHz? - answer-2 x 2.5 dB, or 5.0 dB.
What is the attenuation through 1,600-feet of 0.750 cable at 600 MHz and 120° F, when at 68° F and 600 MHz
the cable attenuation rate is 1.31 decibels (dB)/100 feet? (Be sure to factor in the higher temperature.) -
answer-22.05 dB.
What happens when there is an impedance mismatch between the coaxial cable and the load? - answer-Some
signal energy is transferred to the load, with the remainder reflected along the coaxial cable back to the
source.
What is the return loss in coaxial cable? - answer-The difference in decibels (dB) between the signal power
applied to a terminated cable and the reflected signal power.
How can signal leaks (egress) from hardline coaxial cable occur? - answer-Through cracks in the shield where
the cable is bent, or tiny holes in the shield.
Why are pin-type hardline connectors the preferred type of connector for attaching hardline coaxial cable to
equipment housings in today's networks? - answer-Over the years, intermittent operation, low-frequency roll-
off, and common path distortion (CPD) issues have been attributed to feed-through connectors.
What type of adapter is used for permanent or temporary jumper installation in place of damaged hardline
coaxial cable or equipment hookup? - answer-Pin-to-F female adapters.
, What should be worn when cutting and preparing hardline coaxial cable for connector attachment? - answer-
Leather work gloves.
How should a knife be used when preparing hardline coaxial cable for connector attachment? - answer-To
carefully cut the dielectric away before coring the cable.
What is a consequence of cutting hardline coaxial cable with conventional side cutters? - answer-The end of
the cable is crushed and deformed, which makes coring the dielectric and sliding connector parts onto the
cable difficult.
When using a single-purpose coring tool, what is done before the coring tool can be used to cut and remove
the dielectric? - answer-The appropriate length of aluminum shield and dielectric must be removed, to expose
the cable center conductor.
If the hardline coaxial cable center conductor is too short after coring the dielectric with a combination coring
tool, what should be done? - answer-Clean out any dielectric and aluminum trimmings from the cable and the
tool and continue coring to the correct depth.
What is different about preparing QR hardline coaxial cable for connector installation compared to all other
types? - answer-QR cable is first cored and the aluminum shield is stripped before the polyethylene jacket is
removed to the proper length, the reverse of other cable types.
What can be said about a straight splice connector? - answer-It is essentially two hardline connectors with a
common interface.
How far beyond a pin connector should the shrink tubing overlap the coaxial cable? - answer-At least two
inches after shrinking.
What do all hardline splitter, directional coupler, power inserter, and distribution tap housings have on the
back? - answer-A threaded mounting tap and strand clamp on the back for attachment to the aerial strand or
an underground pedestal.
What can be done when installing hardline splitters, directional couplers, power inserters, and distribution
taps in tight quarters, such as in a pedestal? - answer-The seizure screw can be removed, and the hardline
connecter attached to the side of the housing.
What is on the interior side of the faceplate in a hardline splitter, directional coupler, power inserter, and
distribution tap? - answer-The electronic circuitry and male or female faceplate/housing interconnect pins.
Questions and Correct Detailed Answers.
Monitoring the status of optical nodes - answer-Involves the use of a node transponder that continuously
monitors a number of critical functions.
Digital return path transmissions - answer-Use DWDM
Dense wavelength division multiplexing
digital return transmitters in hub-to-headend architectures.
Broadband cable operators provide customers with HSD High-speed data connections to the Internet via their
HFC networks using what standard? - answer-DOCSIS
What is MPEG? - answer-A universally accepted standard for digital television, first released in 1992.
Which of the following is true about optical nodes? - answer-They contain four main sections: the optical
receiver, the RF amplifier module, the reverse optical transmitter, and the DC power supply.
What product based on the DOCSIS defines the protocols for IP telephony over HFC? - answer-PacketCable
In a centralized server VOD architecture, - answer-The number of servers needed for video content storage is
smaller than in the distributed server architecture.
Which of the following statements about local ad insertion is true? - answer-Local ad insertion is performed
usually by a video server.
In regard to providing HSD service, - answer-The CMTS
Cable modem termination system
can provide a data transfer rate up to 38 Mbps, using 256-QAM in a single 6 MHz channel.
Which of the following is true about the SONET standard? - answer-SONET is the North American standard
used for telephony applications.
,Compared to a solid copper center conductor, which property about a copper clad aluminum (CCA) center
conductor is correct? - answer-The CCA center conductor has almost equal attenuation at high frequencies.
In hardline coaxial cable, what is the most common dielectric material? - answer-Foamed polyethylene
produced by gas injection.
In aerial installations, why do cable manufacturers recommend that expansion loops be formed in hardline
coaxial cable? - answer-To allow movement of the cable when lashed to the strand
Why was the impedance for the broadband cable industry standardized at 75 ohms (Ω)? - answer-At 75 Ω
characteristic impedance, the coaxial cable has minimal attenuation, with adequate breakdown voltage and
power carrying capacity.
What is the coaxial cable velocity of propagation (VoP)? - answer-The rate that radio frequency (RF) signals
travel through the coaxial cable versus the speed that RF signals travel in a vacuum or free space.
If the attenuation through a 100 ft. span of 0.750 MC2 coaxial cable is 2.5dB at 75 MHz, what will be the
approximate attenuation at 300 MHz? - answer-2 x 2.5 dB, or 5.0 dB.
What is the attenuation through 1,600-feet of 0.750 cable at 600 MHz and 120° F, when at 68° F and 600 MHz
the cable attenuation rate is 1.31 decibels (dB)/100 feet? (Be sure to factor in the higher temperature.) -
answer-22.05 dB.
What happens when there is an impedance mismatch between the coaxial cable and the load? - answer-Some
signal energy is transferred to the load, with the remainder reflected along the coaxial cable back to the
source.
What is the return loss in coaxial cable? - answer-The difference in decibels (dB) between the signal power
applied to a terminated cable and the reflected signal power.
How can signal leaks (egress) from hardline coaxial cable occur? - answer-Through cracks in the shield where
the cable is bent, or tiny holes in the shield.
Why are pin-type hardline connectors the preferred type of connector for attaching hardline coaxial cable to
equipment housings in today's networks? - answer-Over the years, intermittent operation, low-frequency roll-
off, and common path distortion (CPD) issues have been attributed to feed-through connectors.
What type of adapter is used for permanent or temporary jumper installation in place of damaged hardline
coaxial cable or equipment hookup? - answer-Pin-to-F female adapters.
, What should be worn when cutting and preparing hardline coaxial cable for connector attachment? - answer-
Leather work gloves.
How should a knife be used when preparing hardline coaxial cable for connector attachment? - answer-To
carefully cut the dielectric away before coring the cable.
What is a consequence of cutting hardline coaxial cable with conventional side cutters? - answer-The end of
the cable is crushed and deformed, which makes coring the dielectric and sliding connector parts onto the
cable difficult.
When using a single-purpose coring tool, what is done before the coring tool can be used to cut and remove
the dielectric? - answer-The appropriate length of aluminum shield and dielectric must be removed, to expose
the cable center conductor.
If the hardline coaxial cable center conductor is too short after coring the dielectric with a combination coring
tool, what should be done? - answer-Clean out any dielectric and aluminum trimmings from the cable and the
tool and continue coring to the correct depth.
What is different about preparing QR hardline coaxial cable for connector installation compared to all other
types? - answer-QR cable is first cored and the aluminum shield is stripped before the polyethylene jacket is
removed to the proper length, the reverse of other cable types.
What can be said about a straight splice connector? - answer-It is essentially two hardline connectors with a
common interface.
How far beyond a pin connector should the shrink tubing overlap the coaxial cable? - answer-At least two
inches after shrinking.
What do all hardline splitter, directional coupler, power inserter, and distribution tap housings have on the
back? - answer-A threaded mounting tap and strand clamp on the back for attachment to the aerial strand or
an underground pedestal.
What can be done when installing hardline splitters, directional couplers, power inserters, and distribution
taps in tight quarters, such as in a pedestal? - answer-The seizure screw can be removed, and the hardline
connecter attached to the side of the housing.
What is on the interior side of the faceplate in a hardline splitter, directional coupler, power inserter, and
distribution tap? - answer-The electronic circuitry and male or female faceplate/housing interconnect pins.
