Progression Construction Coordinator I – II: Questions
With Accurate Solutions
What is involved when monitoring the status of optical nodes? Correct
Answer - The use of a node transponder that continuously monitors several
critical functions.
Broadband cable operators provide customers with HSD High-speed data
connections to the Internet via their HFC networks using what standard?
Correct Answer - DOCSIS
What is MPEG? Correct Answer - A universally accepted standard for
digital television, first released in 1992.
Which of the following is true about optical nodes? Correct 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? Correct Answer - PacketCable
How does a centralized server Video-on-demandVOD architecture simplify
server management compared to distributed server architecture? Correct
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? Correct
Answer - A video server usually performs local ad insertion
Which of the following is true in a DOCSIS 3.1 CMTS Correct Answer - The
CMTS transmits data downstream over the HFC network using OFDM and
QAM carries
What is the advantage of a digital return system? Correct Answer - The
amount of fiber required in the network can be greatly reduced by using
DWDM digital return transmitters in hub-to-headend architectures
,Which of the following is true about the SONET standard? Correct Answer -
SONET defines optical carrier (OC)
Identifies the various sizes of optical transmission services provided by
SONET (synchronous optical network) technology.
Compared to a solid copper center conductor, which property about a copper
clad aluminum (CCA) center conductor is correct? Correct Answer - The
CCA center conductor has almost equal attenuation at high frequencies.
In aerial installations, why do cable manufacturers recommend that expansion
loops be formed in hardline coaxial cable? Correct 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)? Correct 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)? Correct 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.
What happens when there is an impedance mismatch between the coaxial
cable and the load? Correct Answer - Some signal energy is transferred to
the load, with the remainder reflected along the coaxial cable back to the
source.
How can signal leaks (egress) from hardline coaxial cable occur? Correct
Answer - Through cracks in the shield where the cable is bent, or tiny holes
in the shield.
In hardline coaxial cable, what is the most common dielectric material?
Correct Answer - Foamed polyethylene produced by gas injection.
What is the return loss in coaxial cable? Correct Answer - The difference in
decibels (dB) between the signal power applied to a terminated cable and the
reflected signal power.
, 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? Correct
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.) Correct
Answer - 22.15 dB.
Why are pin-type hardline connectors the preferred type of connector for
attaching hardline coaxial cable to equipment housings in today's networks?
Correct Answer - Over the years, intermittent operation, low-frequency roll-
off, and common path distortion (CPD) issues have been attributed to feed-
through connectors.
What should be worn when cutting and preparing hardline coaxial cable for
connector attachment? Correct Answer - Leather work gloves.
What is a consequence of cutting hardline coaxial cable with conventional side
cutters? Correct Answer - The end of the cable is crushed and deformed,
which makes coring the dielectric and sliding connector parts onto the cable
difficult.
If the hardline coaxial cable center conductor is too short after coring the
dielectric with a combination coring tool, what should be done? Correct
Answer - Clean out any dielectric and aluminum trimmings from the cable
and the tool and continue coring to the correct depth.
What can be said about a straight splice connector? Correct Answer - It is
essentially two hardline connectors with a common interface.
What is different about preparing QR hardline coaxial cable for connector
installation compared to all other types? Correct 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.
How far beyond a pin connector should the shrink tubing overlap the coaxial
cable? Correct Answer - At least two inches after shrinking.
With Accurate Solutions
What is involved when monitoring the status of optical nodes? Correct
Answer - The use of a node transponder that continuously monitors several
critical functions.
Broadband cable operators provide customers with HSD High-speed data
connections to the Internet via their HFC networks using what standard?
Correct Answer - DOCSIS
What is MPEG? Correct Answer - A universally accepted standard for
digital television, first released in 1992.
Which of the following is true about optical nodes? Correct 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? Correct Answer - PacketCable
How does a centralized server Video-on-demandVOD architecture simplify
server management compared to distributed server architecture? Correct
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? Correct
Answer - A video server usually performs local ad insertion
Which of the following is true in a DOCSIS 3.1 CMTS Correct Answer - The
CMTS transmits data downstream over the HFC network using OFDM and
QAM carries
What is the advantage of a digital return system? Correct Answer - The
amount of fiber required in the network can be greatly reduced by using
DWDM digital return transmitters in hub-to-headend architectures
,Which of the following is true about the SONET standard? Correct Answer -
SONET defines optical carrier (OC)
Identifies the various sizes of optical transmission services provided by
SONET (synchronous optical network) technology.
Compared to a solid copper center conductor, which property about a copper
clad aluminum (CCA) center conductor is correct? Correct Answer - The
CCA center conductor has almost equal attenuation at high frequencies.
In aerial installations, why do cable manufacturers recommend that expansion
loops be formed in hardline coaxial cable? Correct 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)? Correct 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)? Correct 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.
What happens when there is an impedance mismatch between the coaxial
cable and the load? Correct Answer - Some signal energy is transferred to
the load, with the remainder reflected along the coaxial cable back to the
source.
How can signal leaks (egress) from hardline coaxial cable occur? Correct
Answer - Through cracks in the shield where the cable is bent, or tiny holes
in the shield.
In hardline coaxial cable, what is the most common dielectric material?
Correct Answer - Foamed polyethylene produced by gas injection.
What is the return loss in coaxial cable? Correct Answer - The difference in
decibels (dB) between the signal power applied to a terminated cable and the
reflected signal power.
, 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? Correct
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.) Correct
Answer - 22.15 dB.
Why are pin-type hardline connectors the preferred type of connector for
attaching hardline coaxial cable to equipment housings in today's networks?
Correct Answer - Over the years, intermittent operation, low-frequency roll-
off, and common path distortion (CPD) issues have been attributed to feed-
through connectors.
What should be worn when cutting and preparing hardline coaxial cable for
connector attachment? Correct Answer - Leather work gloves.
What is a consequence of cutting hardline coaxial cable with conventional side
cutters? Correct Answer - The end of the cable is crushed and deformed,
which makes coring the dielectric and sliding connector parts onto the cable
difficult.
If the hardline coaxial cable center conductor is too short after coring the
dielectric with a combination coring tool, what should be done? Correct
Answer - Clean out any dielectric and aluminum trimmings from the cable
and the tool and continue coring to the correct depth.
What can be said about a straight splice connector? Correct Answer - It is
essentially two hardline connectors with a common interface.
What is different about preparing QR hardline coaxial cable for connector
installation compared to all other types? Correct 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.
How far beyond a pin connector should the shrink tubing overlap the coaxial
cable? Correct Answer - At least two inches after shrinking.
