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Fiber-Optic and Coaxial Cable Installation and Maintenance, Exams of Nursing

Guidelines for installing and maintaining fiber-optic and coaxial cables, including cable pulling tension, cable bend radius, coaxial cable expansion loops, rfog technology, and troubleshooting techniques. It covers various aspects of cable installation, such as plowing, boring, and splicing, as well as safety precautions and equipment usage.

Typology: Exams

2023/2024

Available from 03/28/2024

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Download Fiber-Optic and Coaxial Cable Installation and Maintenance and more Exams Nursing in PDF only on Docsity! 1 | P a g e PROGRESSION CONSTRUCTION COORDINATOR II – III EXAMS WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED RATIONALES ANSWERS 2024 (NEWEST) ALREADY GRADED A+ When splicing fiber-optic cable, why is it a good safety practice to clean off fiber strippers and other hand tools after each use? To prevent the accidental transfer of fiber debris or fiber chips onto clean hands. Where would you expect to install a mid-entry splice in a fiber-optic cable network? A location where a select number of optical fibers need to be spliced, and the remaining buffer tubes and fibers remain untouched. Which type of fusion splicer is ideal for fiber-to-the-x (FTTx) splicing? The fixed V-Groove splicer. When would a mid-entry splice in a fiber-optic network be used? In a self-healing ring network that requires only two fibers to feed an optical fiber drop. What is required of mechanical splices used for acceptance testing? A mechanical splice used for acceptance testing should be simple to use and reusable. What are some prerequisites before performing a fusion splice of optical fibers? A controlled environment such as a splicing van, trailer or tent and a stable work surface that is large enough to accommodate the fusion splicer, tools, and the splice closure. Why are Velcro straps preferred over standard plastic tie wraps when bundling pigtails for storage in a splice panel? Because Velcro straps are removable and can hold the pigtails together without placing undue strain on the optical fibers When preparing fiber-optic cable for connection to a patch panel, how much buffer tube and fiber slack should be provided? Leave enough slack in the buffer tubes to allow the splice trays to reach the splicing equipment and enough fiber slack to store on individual trays for later additions, moves and changes 2 | P a g e If tight-buffered distribution fiber optic cable is installed between the master splice panel in an optical entrance enclosure (0EE) and a rack-mounted fiber-optic distribution panel, where in the facility must the distribution panel be located? The distribution panel can be located anywhere in the facility since the distribution cable complies with indoor code requirements for riser or plenum installations. The quality and attenuation value of a mechanical splice of optical fibers is dependent on which tool during the preparation process? The quality and attenuation value of the mechanical splice of optical fibers is dependent on the quality of the cleaving tool. What step should be performed at the beginning of every fusion splicing operation? Make a number of test splices to set up the fusion splicer and to verify the instrument's settings and calibration for both the environment and the type of fiber to be spliced. Which fusion splicer alignment method uses a camera to align the optical fibers before splicing? The profile alignment system (PAS) method. The National Electrical Safety Code (NESC) provides guidelines concerning which portion of the fiber- optic cable network? Minimum safety clearances between different conductors of overhead and underground electric supply and communications lines. What is a safety concern when aerial fiber-optic cable is installed between poles, even though there are no high-voltage power lines? The buildup of lethal amounts of static electricity on the fiber-optic cable that can discharge through a person on a ladder or some other conductor connected to ground. What is used in outside plant fiber-optic cable to protect and isolate the optical fibers from stress? Strength members and buffer tubes. What is the purpose of grounding to earth? To protect against the adverse effects of lightning and assist in the reduction of static. What is the minimum amount of slack that must be provided for splicing fiber-optic cable in underground installations? 15 meters on both the inbound and outbound span. What information is documented at fiber-optic slack and splice locations? Incoming and outgoing sequential markings showing the cable's physical length. 5 | P a g e What type of fiber-to-the-x (FTTx) topology does a passive optical network (PON) use to make a point- to-multipoint (P2MP) fiber-optic cable connection between the broadband cable headend and the customer premises? Fiber-to-the-home (FTTH). In a passive optical network (PON), which category of fiber-optic cable is routed from the headend into the optical distribution network (ODN)? Trunk. Which type of Passive Optical Network (PON) topology places the optical splitters at the headend, and then routes them to each individual customer premises? Home-run. Which category of fiber-optic cable design typically uses some variation of the star topology? Signal Distribution. What is the ideal way for a broadband cable network designer to plan the replacement of coaxial cable with fiber-optic cable to shorten amplifier cascades? Use the Existing Coaxial network infrastructure. What is a design option for a broadband cable network to maximize the use of its optical fiber resources? Leasing Spare fibers. Which of these items should be identified on a route map? Parks Which type of map contains node information? Design Map How many meters of slack cable are typically used in an aerial installation? 15-25 meters What is one example of a stipulation in a franchise agreement that would affect network design? A 100% fiber-optic network When activating a fiber-optic network, which acceptance-testing stage includes adjusting attenuation levels for the first time? During equipment activation What information should always be included in fiber optic network documentation? 6 | P a g e Fiber assignments. Why might a technician who is troubleshooting an outage in an optical network want to refer to the networks as-built documentation? It will help the Technician determine specific cable lengths. Which of these are concerns for radio frequency over glass (RFoG) and, fiber-to-the-x (FFTx) systems? Consideration of how and who will provide AC power to the optical network terminal (ONT) at the customer premisis What is true of the following types of uninterruptible power supplies (UPS)? The offline type routes incoming power directly to connected devices and switches to battery backup during a power interruption Why is -48 VDC (volts of direct current) with a positive ground used by the telecommunications industry? The reverse polarity is a means of mitigating electrolytic corrosion on the outside plant. Which of the following is true of a centralized power node? It can provide sufficient power for a fiber-optic node, including outside plant amplifiers and customer premises network interface devices (NID) for telephony service. What is an option available on most optical nodes for connecting to the power supply? Through a power cable that is connected from the power supply directly to the power port of the node. In a hybrid fiber/coax (HFC) fiber optic node, what are common voltages produced by dc power? Common voltages produced by DC power supplies include +5, +12, and +24VDC Why do many optical nodes accept two independent power supplies? For redundant powering of the node. The number of rectifiers used in a DC power plant design Is dependent upon the load placed on the system. Why are backup AC generators included in many commercial AC uninterruptible power supply (UPS) and DC power systems? To provide AC power in the event of a prolonged utility power interruption. Which is true of online uninterruptible power supply (UPS) systems? They are recommended for commercial applications such as data centers and telecommunications operations. 7 | P a g e Which type of passive optical network (PON) access architecture replaced asynchronous PON (APON)? Gigabit-capable PON (GPON) Which type of passive optical network (PON) architecture was formed to develop a cost effective, high- bandwidth, easy-to-provision solution for connecting businesses, schools, libraries, and customer local area networks to the public internet? Ethernet PON (EPON) What is the wavelength allocation for video distribution (RF overlay) in broadband PON (BPON) access systems? Between 1,550 and 1,560 nm Which element of a passive optical network (PON) consists of a downstream (forward path) optical transmitter, an upstream (return path) receiver, and a multiplexer/demultiplexer? Optical line terminal (OLT) What is it about radio frequency over glass (RFoG) that made broadband cable operators envision using it to make a seamless transition from the legacy hybrid fiber/coax (HFC) architecture over to a gigabit- capable passive optical network (GPON) or Ethernet passive optical network (EPON)? RFoG can operate in parallel with GPON and EPON, operating independent of the PON communications protocols and data rates. What is the core objective of the Data Over Cable Service interface specification (Docsis) Provisioning of Ethernet passive optical network (EPON), or DPoE, access architecture? To make the EPON elements appear and operate as DOCSIS elements to the existing DOCSIS-based back office provisioning operations. What is one of the requirements that have been identified for next-generation access network architectures? Expanded troubleshooting capability. What is the maximum data rate the XG-PON1 (10G-PON) access architecture supports in the upstream? 2.5 Gbps The 10G-EPON access architecture supports two data rates in the upstream: what are they? 1 Gbps and 10 Gbps What is a benefit of using a point-to-point (P2P) topology instead of a point-to-multipoint(P2MP) topology? P2P topologies are more stable than P2MP topologies. 10 | P a g e Software packages, which electronically automate system records. Which of the following statements about fiber restoration safety is true? Proper signage should be used to alert passers-by of work in progress, as required by local and national safety codes. When mobilizing resources for emergency repair, who is responsible for confirming the best equipment setup locations? Restoration crew foreman (RCF) Which of the following is true in a temporary fiber-optic restoration? The restoration kit should be clearly marked and placed to protect it from damage and from becoming a safety hazard. Regarding outside plant fiber-optic restorations, If a suitable path exists, an aerial span replacement may be accomplished by converting to an underground installation. What is an advantage of having slack fiber-optic cable? When available during a restoration, it decreases down time and repair costs and omits additional splice attenuation. In what applications is a splice closure used? Splice Closures are used to protect optical fibers and splices against a full range of environmental changes in aerial installations or below ground in vaults. When preparing a fiber-optic cable for splicing, what is the purpose of removing approximately 2.5 cm (1 inch) of jacket and any armor that is present, from the end of the cable?When preparing a fiber-optic cable for splicing, what is the purpose of removing approximately 2.5 cm (1 inch) of jacket and any armor that is present, from the end of the cable? To access the cables rip cord and to check the cutting depth of the knife or ringing tool. What does water do to the glass core of an optical fiber? Water causes the glass core of the optical fiber to become opaque, which degrades the signal as its transported through the fiber. When preparing a splice closure, what should be done with the fiberglass rod strength member that runs down the center of loose-tube fiber optic cable? Trim the strength member back for convenience, but leave it long enough to be tightly clamped to a strain-relief lug in the closure. What is the purpose of splice trays inside splice closures? 11 | P a g e Splice trays are designed to provide protection for mechanical splices, fusion splice protectors, and optical splitters as well as provide storage for the required fiber slack. How should the buffer tubes be secured in the closure? The buffer tubes should be secured with tie wraps to allow slight movement without pulling or stressing the optical fibers. How are optical splices secured in a splice tray? Retaining clips hold optical splices in place in a splice tray. What is the Purpose of Buffer tubes in a fiber optic cable? Buffer tubes protect and separate the optical fiber in smaller bundles What mechanisms do pit dry boring machines utilize to bore through soil and underneath obstacles? Hydraulic power,a rod pusher steel rods and a piercing tool When backfilling a boring pit or trench what should be done to protect the buried conduit or cable in conduit CIC Remove accessible rocks and backfill all but the top 12 inches of the pit or trench with sand. When using a fluid-assisted boring machine, why is the drilling fluid added when pulling the drill string back through the hole? 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 When must all fluid assisted boring machine operators and crew members do in case of an inadvertent utility cut or other unforseen accident. Follow a company and equipment manufacturer guidelines and safety procedures. What do electrical grid mats that are bonded to a fluid assisted boring system provide? Operator protection in case of contact with electrical lines the boring equipment and machine operators are at the same electrical potential Which type of vibratory plow is an attachment to a tractor or trenches and requires a ground person to manually guide the conduit into the feed chute as the plow cuts through the ground. The modular vibratory plow In which areas is the use of a vibratory plow much more economical than trenching. In underdeveloped areas where a large tractor can be maneuvered How much coaxial cable can be plowed using a plow machine without a cable reel carrier Lay the coaxial cable along the bury route and have a helper guide the coaxial cable into the feed chute of the forwarding plow 12 | P a g e When preparing to plow conduit how long should the starter trench be A length that allows the plow blade to be lowered to the burial depth without violating the minimum bend radius of the attached conduit When using a surface dry boring machine what is the preferred forward speed of the machine A speed that allows boring bit to work freely without being forced What is the purpose of a portable conduit fishing system It is used to blow a pull line through the conduit How much contraction will 1200 ft of conduit have if the temp changes from 94F to 54F when the rate of contraction is 1 1/2 in per 100 ft per 20f change 36 inches When directly burying coaxial cable, Avoid reverse bending of the coaxial cable when unreeling the coaxial cable. What is the proper method for removing the coaxial cable from its reel for a direct burial operation With the reel on an appropriate stand pull the cable from. The bottom of the reel. What may be required to remove a large rock from the ground during trenching Backhoe When digging the trench, First confirm that all utilities have located their lines. A chain trencher Should be inspected for any loose bolts, broken chain teeth, or any types of fluid leaks before beginning its operation. The boom on a chain trencher Is usually spring-loaded to create tension on the chain. When backfilling the trench, Gravel, a soil stabilizer, or a slurry mixture should be used when proper compaction is difficult to obtain with the present trench material. What are some of the factors in determining the total length of pre-assembled cable in a conduit for a trench site Thermal expansion contraction allowance What is required for checking the physical network integrity when maintaining the coaxial cable network 15 | P a g e 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 inserted and a distribution tap The electronic circuitry and male or female faceplate housing interconnect pins In a directional coupler what is the relationship of the insertion loss between the directional coupler input and through ports and the amount of signal tapped off from the input The more signal tapped off from the input the greater the insertion loss What element in a splitter and directional coupler serves among other functions to determine to which ports 60/90 VAC is sent Plug in fuses What must be done when measuring the port to port isolation between the output ports of a splitter or directional coupler Terminate the common input port How much does a power inserted impact the RFin a network A power inserted should have minimal impact on the RF in both directions Which of the following describes a power inserter It contains a high-pass filter network that passes RF signals between the two RF/AC ports and blocks 60- Hz 60 VAC between the same two ports. Which characterizes a feed through distribution tap It has a directional coupler that efficiently routes most of the signal to the output port while removing a small amount of the signal and passing it to the splitter network Why is it necessary that feed through distribution taps pass AC To pass AC along to power other amplifiers downstream What type of map can be useful for tracking the progress of an network upgrade or the expanse of a network condition such as an outage A network key map Why are many network design maps drawn on a scale in which 1 inch represents 100 ft a ratio of 1:1200 To capture and display the details of the network When looking at a design map what do the small circles within x connected with a solid line represent Joint use poles In a network design map the squares with the number inside are symbols for what devices 16 | P a g e 4 port distribution taps Which hardline coaxial cable splicing project would be in the repaired or maintenace category Splicing in a short replacement cablewitha straight splice connector When studying a network map for an upcoming splicing project how can you identify the high output portion an unbalanced 3 way splitter The high output port of an unbalanced 2 waysplitteris indicated by a dot on the map symbol When splicing equipment into underground hardline coaxial cable if the construction crew forget 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 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 an aerial hardline coaxial cable 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 otherwise highest and lowest downstream channels from specific location when performing a cost payback analysis To help the design group determine where to add distribution taps or tap into the network for a network extension What should be used in place of a short coaxial cable jumpers to provide a compact and solid Mechanical and electrical connection between the equipment housings Housing to housing adapters What is the typical gain of a line extender in decibels. 28 to 35 db Line extenders can be powered from the network or from a 120 volt ac source which of the following statements about line extender power sources is true Line extenders powered by the network can pass current to other devices How much intermodulatiin distortion degradation is added when two line extender amplifier with identical distortion characteristics are in cascade 6 db What can cause a resistive type of test to deliver false information An impedance mismatch Why is it unnecessary to measure the unregulated direct current DC voltage on a line extender that has a switching mode power supply SMPS An SMPS provides DC voltage regulation over a wider AC voltage range than a linear power supply 17 | P a g e 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? Positive tilt When setting up the forward amplifier of a line extender why must the manual gain control be a mid range position at the desired operating level For the automatic thermal control to work effectively Why is it good practice to measure the downstream input 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 Undocumented changes to the network design can affect the designed input to the line extender ot 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 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 headed or node Unity gain Why are pin type connectors the preferred type of connector for attaching hardline coaxial cable to equipment housings in today's network s Over the years intermittent operation low frequency roll off and common path distortion issues have been attributed feed through connectors What tye of adapter is used for permanent or temporary jumper installation in place of damaged hardline coaxial cable or equipment hookup Pin to F female adapters What's should be worn when cutting and preparing hardline coaxial cable for connector attachment Leather work gloves How should a knife be used when preparing hardline coaxial cable for connector attachments To carefully cut the dielectric away before coring the cable What is the consequences of cutting hardline coaxial cable with conventional side cutters 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