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Construction Coordinator Exam 2023: Cable Network Technology, Exams of Nursing

Hamilton CollegeNursing

Progression: Construction Coordinator I – II exam 2023

Typology: Exams

2022/2023

Available from 09/20/2023

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Talia00 🇺🇸

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Progression: Construction Coordinator I – II
exam 2023
Monitoring the status of optical nodes - correct answers Involves the use of a node transponder that
continuously monitors a number of critical functions.
Digital return path transmissions - correct 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? - correct answers DOCSIS
What is MPEG? - correct answers A universally accepted standard for digital television, first released in
1992.
Which of the following is true about optical nodes? - correct 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? - correct answers
PacketCable
In a centralized server VOD architecture, - correct 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? - correct answers Local ad insertion is
performed usually by a video server.
In regard to providing HSD service, - correct 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? - correct 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? - correct answers The CCA center conductor has almost equal attenuation
at high frequencies.
In hardline coaxial cable, what is the most common dielectric material? - correct answers Foamed
polyethylene produced by gas injection.
In aerial installations, why do cable manufacturers recommend that expansion loops be formed in
hardline coaxial cable? - correct 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)? - correct
answers At 75 Ω characteristic impedance, the coaxial cable has minimal attenuation, with adequate
breakdown voltage and power carrying capacity.
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exam 2023

Monitoring the status of optical nodes - correct answers Involves the use of a node transponder that continuously monitors a number of critical functions. Digital return path transmissions - correct 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? - correct answers DOCSIS What is MPEG? - correct answers A universally accepted standard for digital television, first released in

Which of the following is true about optical nodes? - correct 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? - correct answers PacketCable In a centralized server VOD architecture, - correct 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? - correct answers Local ad insertion is performed usually by a video server. In regard to providing HSD service, - correct 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? - correct 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? - correct answers The CCA center conductor has almost equal attenuation at high frequencies. In hardline coaxial cable, what is the most common dielectric material? - correct answers Foamed polyethylene produced by gas injection. In aerial installations, why do cable manufacturers recommend that expansion loops be formed in hardline coaxial cable? - correct 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)? - correct answers At 75 Ω characteristic impedance, the coaxial cable has minimal attenuation, with adequate breakdown voltage and power carrying capacity.

exam 2023

What is the coaxial cable velocity of propagation (VoP)? - correct 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? - correct 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.) - correct answers 22.05 dB. What happens when there is an impedance mismatch between the coaxial cable and the load? - correct answers 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? - correct answers 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? - correct answers 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? - correct answers 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? - correct answers Pin-to-F female adapters. What should be worn when cutting and preparing hardline coaxial cable for connector attachment? - correct answers Leather work gloves. How should a knife be used when preparing hardline coaxial cable for connector attachment? - correct answers To carefully cut the dielectric away before coring the cable. What is a consequence of cutting hardline coaxial cable with conventional side cutters? - correct answers 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? - correct answers 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? - correct answers Clean out any dielectric and aluminum trimmings from the cable and the tool and continue coring to the correct depth.

exam 2023

Why are many network design maps drawn on a scale in which 1 inch represents 100 feet, a ratio of 1:1,200? - correct answers To capture and display the details of the network. When looking at a design map, what do the small circles with an X connected with a solid line represent?

  • correct answers Joint use poles. In a network design map, the squares with the number inside are symbols for what devices? - correct answers 4-port distribution taps. Which hardline coaxial cable splicing project would be in the repair and/or maintenance category? - correct answers Splicing in a short replacement cable with a straight splice connector. When studying a network map for an upcoming splicing project, how can you identify the high-output port of an unbalanced 3-way splitter? - correct answers The high-output port of an unbalanced 3-way splitter is indicated by a dot on the map symbol. When splicing equipment into underground hardline coaxial cable, if the construction crew forgets to identify the direction of the cable, what can be done to find which cable attaches to the input and output side of the equipment? - correct answers Attach a cable locator to each cable to identify the route that each buried cable follows. When can a single straight splice connector be used to repair a crack in aerial hardline coaxial cable? - correct answers If the crack is small, water migration is minimal, and the crack is in a straight section of cable. Why would a technician be asked to measure the signal levels on the highest and lowest downstream channels from a specific location when performing a cost payback analysis? - correct answers To help the design group determine where to add distribution taps, or to tap into the network for a network extension. What should be used in place of short coaxial cable jumpers to provide a compact and solid mechanical and electrical connection between the equipment housings? - correct answers Housing-to-housing adapters. What is the typical gain of a line extender in decibels (dB)? - correct answers 53 to 60 decibels (dB). Line extenders can be powered from the network or from a 120- volts alternating current (VAC) source. Which of the following statements about line extender power sources is true? - correct answers Line extenders powered by the network can pass current to other devices. How much intermodulation distortion degradation is added when two line extender amplifiers with identical distortion characteristics are in cascade? - correct answers 6 decibels (dB). What can cause a resistive type of test to deliver false information? - correct answers An impedance mismatch.

exam 2023

Why is it unnecessary to measure the unregulated direct current (DC) voltage on a line extender that has a switching mode power supply (SMPS)? - correct answers An SMPS provides DC voltage regulation over a wider alternating current (AC) voltage range than a linear power supply. As the RF signal travels on the coaxial cable, one portion of the signal may be attenuated more than the others. What term is used to describe a situation where cable attenuation is low, causing signal levels to remain greater at the higher frequencies than at the lower frequencies? - correct answers Positive tilt. When setting up the forward amplifier of a line extender, why must the manual gain control be at a mid- range position at the desired operating level? - correct answers For the automatic/thermal control to work effectively. Why is it a good practice to measure the downstream input signal and compare the measurements to the calculated levels shown on the network maps before attempting to set up the forward amplifier section of a line extender? - correct answers Undocumented changes to the network design can affect the designed input to the line extender, or there could be a separate problem that needs to be corrected. A return path sweep-and-alignment system is used to adjust which of the following? - correct answers Signals from a line extender to the headend. When aligning amplifiers in the return path, what must be achieved and maintained from the customer premises to the headend, or node? - correct answers An active return path through all the line extenders. What is a metallic time domain reflectometer (MTDR)? - correct answers A test instrument that measures reflected voltage at discrete moments in time to evaluate the electrical characteristics of metallic cables. How does a time domain reflectometer (TDR) measure the distance to a reflection from a fault or the end of a cable? - correct answers Circuitry within the TDR converts the pulse travel time into distance and displays the information as a waveform with a scale showing the distance to the reflection. Velocity of propagation (VOP) is the speed of the radio frequency (RF) signals traveling in a coaxial cable relative to the speed of light. What is the range of VOP factors for broadband coaxial cable? - correct answers 0.78 to 0. What presents the biggest electrical shock hazard when operating a time domain reflectometer (TDR) in the network? - correct answers The low-frequency alternating current (AC) voltage on the coaxial cable. What does the decibel return loss (dBRL) displayed on most time domain reflectometers (TDR) indicate?

  • correct answers The relative severity of a cable fault. Anomalies, such as echoes and blind spots, can hide cable faults or cause a technician to misinterpret the signature of a time domain reflectometer (TDR) waveform. What causes an echo on a waveform TDR? - correct answers The extra distance that the TDR pulse travels after initially reflecting off the end of the cable span.

exam 2023

What is required for checking the physical network integrity when maintaining the coaxial cable network? - correct answers Being observant and performing some minor tasks while engaged in regularly scheduled activities. A chain trencher - correct answers Should be inspected for any loose bolts, broken chain teeth, or any types of fluid leaks before beginning its operation. When digging the trench, - correct answers First confirm that all utilities have located their lines. What may be required to remove a very large rock from the ground during trenching? - correct answers Backhoe. What is the proper method for removing the coaxial cable from its reel for a direct burial operation? - correct answers With the reel on an appropriate stand, pull the cable from the bottom of the reel. When directly burying coaxial cable, - correct answers Avoid reverse bending of the coaxial cable when unreeling the coaxial cable. How much contraction will 1,200 feet of conduit have if the temperature changes from 94 degrees F to 54 degrees F when the rate of contraction is 1 1/2 inches per 100 feet per 20 degrees F change? - correct answers 36 inches. What is the purpose of a portable conduit fishing system? - correct answers It is used to blow a pull-line through the conduit. What are some of the factors in determining the total length of preassembled cable in a conduit for a trench site? - correct answers Thermal expansion/contraction allowance. When backfilling the trench, - correct answers Gravel, a soil stabilizer, or a slurry mixture should be used when proper compaction is difficult to obtain with the present trench material. The boom on a chain trencher - correct answers Is usually spring-loaded to create tension on the chain. Which type of vibratory plow is an attachment to a tractor or trencher and requires a ground person to manually guide the conduit into the feed chute as the plow cuts through the ground? - correct answers The modular vibratory plow. In which areas is the use of a vibratory plow much more economical than trenching? - correct answers In undeveloped areas where a large tractor can be maneuvered. How should coaxial cable be plowed using a plow machine without a cable reel carrier? - correct answers Lay the coaxial cable along the bury route and have a helper guide the coaxial cable into the feed chute of the forward-moving plow. When preparing to plow conduit/cable in conduit (CIC), how long should the starter trench be? - correct answers A length that allows the plow blade to be lowered to the burial depth without violating the minimum bend radius of the attached conduit.

exam 2023

What mechanisms do pit dry boring machines utilize to bore through soil and underneath obstacles? - correct answers Hydraulic power, a rod pusher, steel rods, and a piercing tool. When using a surface dry boring machine, what is the preferred forward speed of the machine? - correct answers A speed that allows the boring bit to work freely without being forced. When backfilling a boring pit or trench, what should be done to protect the buried conduit or cable in conduit (CIC)? - correct answers Remove accessible rocks and backfill all but the top 12 inches of the pit or trench with sand. What must all fluid assisted boring machine operators and crew members do in case of an inadvertent utility cut or other unforeseen accident? - correct answers Follow all company and equipment manufacturer guidelines and safety procedures. What do the electrical grid mats that are bonded to a fluid-assisted boring system provide? - correct answers Operator protection, in case of contact with electrical lines, the boring equipment and machine operators are at the same electrical potential. When using a fluid-assisted boring machine, why is the drilling fluid added when pulling the drill string back through the hole? - correct answers To help the rotating back-reamer expand the drilled pilot hole diameter and reduce the drag on the conduit that is being pulled into place.