Progression: Construction Coordinator I - II Exam Answered Correctly. |
2025 UPDATED
Monitoring the status of optical nodes - (answers)Involves the use of a node transponder that
continuously monitors a number of critical functions.
Digital return path transmissions - (answers)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? - (answers)DOCSIS
What is MPEG? - (answers)A universally accepted standard for digital television, first released
in 1992.
Which of the following is true about optical nodes? - (answers)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? -
(answers)PacketCable
In a centralized server VOD architecture, - (answers)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? - (answers)Local ad insertion
is performed usually by a video server.
In regard to providing HSD service, - (answers)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? - (answers)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? - (answers)The CCA center conductor has almost equal
attenuation at high frequencies.
In hardline coaxial cable, what is the most common dielectric material? - (answers)Foamed
polyethylene produced by gas injection.
In aerial installations, why do cable manufacturers recommend that expansion loops be formed in
hardline coaxial cable? - (answers)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)? -
(answers)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)? - (answers)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? - (answers)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.) - (answers)22.05 dB.
What happens when there is an impedance mismatch between the coaxial cable and the load? -
(answers)Some signal energy is transferred to the load, with the remainder reflected along the
coaxial cable back to the source.
2025 UPDATED
Monitoring the status of optical nodes - (answers)Involves the use of a node transponder that
continuously monitors a number of critical functions.
Digital return path transmissions - (answers)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? - (answers)DOCSIS
What is MPEG? - (answers)A universally accepted standard for digital television, first released
in 1992.
Which of the following is true about optical nodes? - (answers)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? -
(answers)PacketCable
In a centralized server VOD architecture, - (answers)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? - (answers)Local ad insertion
is performed usually by a video server.
In regard to providing HSD service, - (answers)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? - (answers)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? - (answers)The CCA center conductor has almost equal
attenuation at high frequencies.
In hardline coaxial cable, what is the most common dielectric material? - (answers)Foamed
polyethylene produced by gas injection.
In aerial installations, why do cable manufacturers recommend that expansion loops be formed in
hardline coaxial cable? - (answers)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)? -
(answers)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)? - (answers)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? - (answers)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.) - (answers)22.05 dB.
What happens when there is an impedance mismatch between the coaxial cable and the load? -
(answers)Some signal energy is transferred to the load, with the remainder reflected along the
coaxial cable back to the source.
