Construction Coordinator I-II: Questions With
Insightful 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.
What is an advantage of a digital return system? Correct Answer - ⦁ The
amount of fiber required in the network can be greatly reduced by using
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 through their HFC networks using what standard?
Correct Answer - ⦁ DOCSIS
What is MPEG (Moving Picture Experts Group)? Correct Answer - ⦁ A
universally accepted DTV Digital television standard, 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 Radio frequency
amplifier module, the reverse optical transmitter, and the DC Direct current
power supply.
What product based on the DOCSIS Data Over Cable Service Interface
Specification defines the protocols for IP Internet Protocol telephony over
HFC Hybrid fiber/coax networks? Correct Answer - ⦁ PacketCable.
How does a centralized server VOD Video-on-demand 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 Data Over Cable Service Interface
Specification 3.1 CMTS? Correct Answer - ⦁ The CMTS transmits data
downstream over the HFC Hybrid fiber/coax network using OFDM Orthogonal
frequency division multiplexing and QAM Quadrature amplitude modulation
carriers.
Which of the following is true about the SONET Synchronous optical network
transmission standard? Correct Answer - ⦁ SONET defines OC Optical
carrier data rates and interface standards that enable international
communications carriers to interconnect existing fiber-optic transmission
networks.
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 hardline coaxial cable, what is the most common dielectric material?
Correct Answer - ⦁ Foamed polyethylene produced by gas injection.
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.
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
Insightful 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.
What is an advantage of a digital return system? Correct Answer - ⦁ The
amount of fiber required in the network can be greatly reduced by using
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 through their HFC networks using what standard?
Correct Answer - ⦁ DOCSIS
What is MPEG (Moving Picture Experts Group)? Correct Answer - ⦁ A
universally accepted DTV Digital television standard, 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 Radio frequency
amplifier module, the reverse optical transmitter, and the DC Direct current
power supply.
What product based on the DOCSIS Data Over Cable Service Interface
Specification defines the protocols for IP Internet Protocol telephony over
HFC Hybrid fiber/coax networks? Correct Answer - ⦁ PacketCable.
How does a centralized server VOD Video-on-demand 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 Data Over Cable Service Interface
Specification 3.1 CMTS? Correct Answer - ⦁ The CMTS transmits data
downstream over the HFC Hybrid fiber/coax network using OFDM Orthogonal
frequency division multiplexing and QAM Quadrature amplitude modulation
carriers.
Which of the following is true about the SONET Synchronous optical network
transmission standard? Correct Answer - ⦁ SONET defines OC Optical
carrier data rates and interface standards that enable international
communications carriers to interconnect existing fiber-optic transmission
networks.
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 hardline coaxial cable, what is the most common dielectric material?
Correct Answer - ⦁ Foamed polyethylene produced by gas injection.
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.
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
