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PROGRESSION CONSTRUCTION COORDINATOR II –
III EXAM 2024 | 2 DIFFERENT EXAMS | 200
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Progression Construction Coordinator II – III Exam 1
Which of the following is true regarding reflections in an optical fiber? ----- CORRECT ANSWER----------------Rayleigh scattering is caused by compositional fluctuations or core imperfections in the fiber. What is true of mainframe optical time domain reflectometers (OTDR)? ----- CORRECT ANSWER----------------They are used mainly in the fiber manufacturing industry. What do optical time domain reflectometer (OTDR) displays and controls encompass? -----CORRECT ANSWER----------------Task options, which include range, pulse width, wavelength, measuring mode, backscatter coefficient, and index of refraction. What is the probable cause if an optical time domain reflectometer (OTDR) trace shows one optical splice but it is a known fact that there are two? ----- CORRECT ANSWER----------------The pulse width is set too long. Index of refraction (IOR) is calculated by what formula? -----CORRECT ANSWER----------------Divide the speed of light in a vacuum by the speed of light through an optical fiber.
The National Electrical Safety Code (NESC) requires drop cables to be placed at what minimum depth? -----CORRECT ANSWER---------------- 18 inches. When troubleshooting radio frequency over glass (RFoG) and passive optical network (PON) FTTx systems that use longer wavelengths, what is the common cause of higher losses that should be addressed? ----- CORRECT ANSWER----------------Macrobends and microbends caused by improper bending and pinching of cables and patch cords. Which of the following is true about fiber network restoration planning? ----- CORRECT ANSWER----------------Responsibility for update and control of the restoration plan document must be defined or it will quickly become obsolete and useless. What can happen inside fiber-optic equipment room facilities? ----- CORRECT ANSWER----------------Failures can typically arise at patch panels, somewhere in opto-electronic systems, and because of installation practices. How is a restoration posture for a fiber network acquired? -----CORRECT ANSWER----------------The basic resources required to respond to a major system outage are documentation, technical skill, and basic troubleshooting/repair equipment and materials. What is an important consideration in structuring a flow chart of basic restoration activities? -----CORRECT ANSWER----------------The restoration plan prescribes the sequence of events described in the flow chart.
What is the first order of business for the fiber-optic field restoration coordinator (FRC)? -----CORRECT ANSWER----------------To conduct a site visit to verify the extent of the damage. Which of the following is true regarding fiber-optic restoration? ----- CORRECT ANSWER----------------Requires preparation for dealing with factors that affect outage repair, including foul weather, darkness, electric utility failures, and the need to repair the system quickly. For fiber restoration, what can facilitate necessary documentation? ----- CORRECT ANSWER----------------Software packages, which electronically automate system records. Which of the following statements about fiber restoration safety is true? ----- CORRECT ANSWER----------------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? -----CORRECT ANSWER-- --------------Restoration crew foreman (RCF) Which of the following is true in a temporary fiber-optic restoration? ----- CORRECT ANSWER----------------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, -----CORRECT ANSWER-- --------------If a suitable path exists, an aerial span replacement may be accomplished by converting to an underground installation. In what applications is a splice closure used? -----CORRECT ANSWER----- -----------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? ----- CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------Splice trays are designed to provide protection for
When would a mid-entry splice in a fiber-optic network be used? ----- CORRECT ANSWER----------------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? ----- CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER---- ------------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? -----CORRECT ANSWER----------------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 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? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------The profile alignment system (PAS) method. The National Electrical Safety Code (NESC) provides guidelines concerning which portion of the fiber-optic cable network? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------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.
ANSWER----------------Install grounding clamps, which connect the cable exterior and metallic messengers to a good solid ground at each pole site. When working on a ladder, which rungs are forbidden for standing? ----- CORRECT ANSWER----------------The top two rungs of any ladder. What is the minimum clearance in the middle of a cable span between the power's secondary conductor and the fiber-optic cable belonging to a broadband cable operator? -----CORRECT ANSWER---------------- 30 inches. When installing aerial fiber-optic cable employing the back-pull method, how should the cable trailer be positioned in order to keep the cable from rubbing on the pole or cable reel when pulled? -----CORRECT ANSWER---- ------------The trailer should be positioned in line with the strand and at least twice the distance from the pole as the height from the ground to the set-up chute. What are some advantages of using flexible conduit? -----CORRECT ANSWER----------------Low coefficient of friction (COF) and the capability to bend around corners and obstructions with minimal splices. What can be used as a pulling line in a conduit that is missing a pull line? -- ---CORRECT ANSWER----------------An unused cable that is already installed in the conduit. In underground installations, what are two recommended techniques that prevent the pulling tension through the conduit from exceeding the pulling
tension specification of the fiber-optic cable? -----CORRECT ANSWER------ ----------The midpoint pull and the intermediate pull. How is the high air speed blowing (HASB) method of installing fiber-optic cable in conduit different from other methods? -----CORRECT ANSWER---- ------------There is no need for a pulling rope in the conduit before the cable is installed. Eliminating pulling lines using high air speed blowing (HASB) can achieve how much of a cost savings over conventional pulling techniques? ----- CORRECT ANSWER----------------More than 40%. When is it necessary to use the intermediate pull technique to install fiber- optic cable in conduit? -----CORRECT ANSWER----------------When the cable route has multiple 90° bends throughout. When installing fiber-optic cable over coaxial cable, what should be done at the coaxial cable expansion loops? -----CORRECT ANSWER---------------- Secure the fiber-optic cable to the strand across the coaxial cable expansion loops using plastic cable ties or support straps. What are the two accepted methods for pulling fiber-optic cable off the cable reel as part of an aerial installation? -----CORRECT ANSWER---------- ------The back-pull method and the drive-off method. What is an example of transport media in a telecommunications network? -- ---CORRECT ANSWER----------------Coaxial cable.
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? -----CORRECT ANSWER----------------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)? ----- CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------Home-run. Which category of fiber-optic cable design typically uses some variation of the star topology? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER----------------Leasing Spare fibers.
Which of these items should be identified on a route map? -----CORRECT ANSWER----------------Parks Which type of map contains node information? -----CORRECT ANSWER--- -------------Design Map How many meters of slack cable are typically used in an aerial installation? -----CORRECT ANSWER---------------- 15 - 25 meters What is one example of a stipulation in a franchise agreement that would affect network design? -----CORRECT ANSWER----------------A 100% fiber- optic network When activating a fiber-optic network, which acceptance-testing stage includes adjusting attenuation levels for the first time? -----CORRECT ANSWER----------------During equipment activation What information should always be included in fiber optic network documentation? -----CORRECT ANSWER----------------Fiber assignments. Why might a technician who is troubleshooting an outage in an optical network want to refer to the networks as-built documentation? ----- CORRECT ANSWER----------------It will help the Technician determine specific cable lengths.
Why do many optical nodes accept two independent power supplies? ----- CORRECT ANSWER----------------For redundant powering of the node. The number of rectifiers used in a DC power plant design -----CORRECT ANSWER----------------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? ----- CORRECT ANSWER----------------To provide AC power in the event of a prolonged utility power interruption. Which is true of online uninterruptible power supply (UPS) systems? ----- CORRECT ANSWER----------------They are recommended for commercial applications such as data centers and telecommunications operations. Which type of passive optical network (PON) access architecture replaced asynchronous PON (APON)? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER---------------- Ethernet PON (EPON)
What is the wavelength allocation for video distribution (RF overlay) in broadband PON (BPON) access systems? -----CORRECT ANSWER-------- --------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? -----CORRECT ANSWER---------- ------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)? -----CORRECT ANSWER----------------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? -----CORRECT ANSWER------------ ----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? -----CORRECT ANSWER---------- ------Expanded troubleshooting capability. What is the maximum data rate the XG-PON1 (10G-PON) access architecture supports in the upstream? -----CORRECT ANSWER-------------- --2.5 Gbps
What is an advantage of having slack fiber-optic cable? -----CORRECT ANSWER----------------When available during a restoration, it decreases down time and repair costs and omits additional splice attenuation.
Progression Construction Coordinator II – III
Exam 2
Monitoring the status of optical nodes -----CORRECT ANSWER--------------- Involves the use of a node transponder that continuously monitors a number of critical functions. Digital return path transmissions -----CORRECT ANSWER---------------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 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 In a centralized server VOD 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---------------Local ad insertion is performed usually by a video server. In regard to providing HSD service, -----CORRECT ANSWER--------------- 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 ANSWER---------------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 ANSWER---------------The CCA center conductor has almost equal attenuation at high frequencies.
