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OSP 001 PRACTICE TEST | 100% Correct
Answers | Verified | Latest 2024 Version
in areas where future excavation is anticipated, it may be advisable to place the cable at a greater depth. For example, if road grading that will remove 610 mm (24 in) of dirt is planned in a particular area, it would be wiser to initially place the cable at 1.2 m (4 ft) versus the standard 610 mm (24 in). - ✔✔True placing all of the conduits during the initial conduit system installation is desirable, if not mandatory. *True *False - ✔✔True It is not always necessary to build new pathways for cable placement *True *False - ✔✔True The length of a cable loop from the switch to a customer depends on three factors - ✔✔• Resistance of the cable in ohms
- Signaling limits of the telephone and the terminating device switch in ohms
- Pair loading Outside Plant (OSP) - ✔✔Telecommunications OSP cabling began with the placement of the first telegraph system, Cable Types - ✔✔• Optical fiber:
- 62.5/125 micrometer (μm) multimode optical fiber (OM1).
- 50/125 μm multimode optical fiber (OM2, OM3, and OM4).
- Singlemode optical fiber (OS1 and OS2).
- 100-ohm balanced twisted-pair.
- 75-ohm coaxial. Codes - ✔✔rules specified by governmental entities Installation manuals are examples of - ✔✔Methodology Support structures: - ✔✔- MHs).
- (HHs).
- Poles, support strands, and guying information. The basic types of OSP pathways and spaces are: - ✔✔• Underground.
- Direct-buried.
- Aerial. advantage to use optical fiber in backbones campus applications: - ✔✔• Increased distance.
- Higher bandwidth applications.
- All-dielectric cable.
- Less susceptibility to EMI and lightning.
- No crosstalk.
- No grounding (earthing) requirement for all-dielectric cable. Optical Fiber Connectors: - ✔✔• LC
- SC
- ST How to calculate passive cable system attenuation - ✔✔Total optical fiber loss
- Dry water block
- Nonfilled Sheath design - ✔✔- Optical power ground wire (OPGW)
- All-dielectric self-supporting (ADSS)
- Dielectric
- Self-supporting
- Armored self-supporting
- Metallic Oversheath design - ✔✔- Stainless steel
- Coated steel
- Nothing over sheath
- Self-supporting Wavelength - ✔✔- Multimode 850/1300 nm
- Singlemode 1310/1550 nm
- Singlemode, dispersion shifted 1550 nm optical fiber color-code - ✔✔Fiber Color 1 Blue 2 Orange 3 Green 4 Brown 5 Slate 6 White 7 Red 8 Black
9 Yellow 10 Violet 11 Rose 12 Aqua tight-buffered contains both singlemode and multimode fibers - ✔✔singlemode fibers -- yellow multimode fibers -- orange American wire gauge (AWG) - ✔✔AWG Metric Imperial 19 AWG 0.91 mm 0.036 in 22 AWG 0.64 mm 0.025 in 24 AWG 0.51 mm 0.020 in 26 AWG 0.41 mm 0.016 in The length of a cable loop from the switch to a customer depends on three factors: - ✔✔• Resistance of the cable in ohms
- Signaling limits of the telephone and the terminating device switch in ohms
- Pair loading GACAN limits usage to no more than ______ cable gauges - ✔✔two Insulation Type - ✔✔PIC (Solid plastic insulation) DEPIC (Dual-expanded plastic insulation) Pulp (Paper insulation) Foam (Single layer of expanded plastic insulation) Foam-skin (Dual plastic insulation consisting of an inner foamed layer and an outer solid skin layer) PVC (Solid PVC insulation)
conductors are:
- 2, 3, 5, and 6 solid copper pairs.
- Air core or filled.
- Foil or metallic shield (optional).
- Equipped with support strand or supported by its own sheath. When determining the size and type of coaxial cable, the two major factors an OSP designer has to consider - ✔✔* attenuation margin
- cost the last and most important piece of any network. It is also the final piece of cable that an OSP designer has to choose. - ✔✔The subscriber service drop cable when designing new coaxial Subscriber Service Drops what range of megahertz should be employed? - ✔✔900 to 1000 MHz fundamental cabling topologies - ✔✔* star
- ring
- bus protection against network downtime - ✔✔redundancy underground projected lifespan - ✔✔50 years is one of the most important parts of any job. It allows the OSP designer to take the time to look at the overall picture and resolve any possible conflicts that could delay or stop the job. - ✔✔Site survey Direct-buried and Aerial plant has a lifespan - ✔✔30 years
It is always necessary to build new pathways for cable placement.
- True
- False - ✔✔False The Common Ground Alliance (CGA) recommends uniform color codes - ✔✔White Proposed excavation Pink Temporary survey markings Red Electric power lines, cables, conduit, and lighting cables Yellow Gas, oil, steam, petroleum, or gaseous materials Orange Communications, alarm, and signal lines, cables, and conduit Blue Potable water Purple Reclaimed water and irrigation and slurry lines Green Sewers and drain lines
- test hole is located within the tolerance zone ______
- If the zone is not identified by law or code, the measured zone should be a minimum of _______ - ✔✔- between 305 millimeters (mm [12 inches (in)]) and 914 mm (36 in) from the marked obstacle
- 457 mm (18 in) measured horizontally from the center to each side of the facility. permits should be obtained from an appropriate authority having jurisdiction (AHJ) (federal, state, county, city, or park) for the use of the proposed route. - ✔✔Public right-of-way the right to use the property must be negotiated with each land owner. - ✔✔Private right-of-way or easement A conduit system should be
outside surfaces of foreign structures ______ when crossing pipes (e.g., gas, water, oil). - ✔✔152 mm ( in) The minimum recommended separations between telecommunications conduit systems and outside surfaces of foreign structures ______ when parallel to pipes (e.g., gas, water, oil). - ✔✔305 mm (12 in) The top of the conduit should be located at a sufficient depth ______ below surface grade - ✔✔610 mm [24 in] to 762 mm [30 in] in Live or Dynamic Loads when conduits are located at least ______ below grade, the load is well dispersed. - ✔✔1.83 m (6 ft) A drain slope toward the MH from the center of the conduit run or from the building of no less than - ✔✔10 mm per m (0.125 in per ft) For wall racking considerations, design (center or splayed) ductbank entrances on the sides of the end walls. - ✔✔splayed If the total number of conduits being placed is significantly less than the capacity of the terminating MH or cable entrance, conduits should enter at the _____ level within the MH. ______ space should be reserved for future conduit additions. - ✔✔* lowest
- The upper recommended conduit formations for up to _____ conduits at the MH entrance. - ✔✔ 40 Straight lengths of individual Plastic conduit is _____ - ✔✔6.1 m (20 ft) Types of Straight conduit - ✔✔Type B (thin wall) requires concrete encasement.
Type C (thick wall) may be direct-buried with selected backfill in straight runs. Type D is ultraviolet (sunlight) and flame resistant. Type E is not used for straight line conduit. What is the min # of years recommended for sizing the direct buried cable plant? - ✔✔20 years Galvanized rigid steel conduit is intended only for use in locations where other materials are not suitable.
- True
- False - ✔✔True BICSI's recommended size for galvanized rigid steel is ____ - ✔✔103 mm (4 trade size) The size of the mandrel should be ______ less than the ID of the duct, and should be from _____ in length. - ✔✔* 6.3 mm (1/4 in) to 12.7 mm (1/2 in)
- 152 mm (6 in) to 305 mm (12 in) If a design will require installing new cable in existing empty duct, the OSP designer should consider requiring a _____ of the existing duct before installing the cable to verify that the duct is usable. - ✔✔mandrel test Innerduct comes in standard corrugated HDPE or PVC type pipe, typically with ______ diameter. - ✔✔ 26 or 32 mm (1 or 1.26 in) _____ design facilitates easy wire pulling, and its flexibility eliminates the need for bending equipment. - ✔✔The corrugated In a 101.6 mm (4 in) duct, up to _______ fabric mesh cells can be placed - ✔✔eight or nine
*sheeted *braced If depths are greater than _____ shoring construction should be designed by a qualified professional engineer. - ✔✔6.1 m (20 ft) Leave _____ working space between brace and conduit if the trench depth is 3 m (10 ft) or less in both stable and unstable ground - ✔✔101.6 mm (4 in) to 152 mm (6 in) Where sheeting or shoring is not required, the amount of required subsurface space is based on ______
- ✔✔the width of the conduit formation
the space needed for:
- Working.
- Backfill.
- Concrete encasing. The depth of the trench is _____ - ✔✔the height of the conduit formation
610 mm (24 in) of cover and any top protection or bedding requirement. To provide secure support of the conduit system under bridge, conduit hangers are located at specific intervals along the structure. They should be spaced at ____ intervals for Type D PVC plastic conduit. - ✔✔2.4 m (8 ft) Because of the inherent thermal expansion and contraction of the conduit materials, expansion joints must be provided for each _____ of PVC Type D conduit - ✔✔30.5 m (100 ft) Conduit Design for Bridge Crossing methods: - ✔✔* Conduit installed in sidewalk portion of bridge
- Conduit installed by hanging under sidewalk portion of bridge
- Conduit run attached to side of bridge with steel brackets
- Conduit runs attached to steel I beams Five areas where tunnels may provide an optimum long-range solution to a customer's space requirements are: - ✔✔• Transit subway station construction.
- Urban renewal districts.
- Central business districts.
- Campus or institutional projects.
- Large-capacity pathways under known underground obstructions (e.g., buildings). Primary advantages of using a tunnel include: - ✔✔• Reduced street maintenance.
- Decreased chances of accidental dig-ups.
- Reduced ground corrosion factors.
- A continuous inspection path for all facilities.
- Permanent space allocation.
- Reduced surface interference to both vehicular and pedestrian traffic, except during open-cut phase. A common rule of thumb for personnel ventilation in tunnels is _____ complete air changes per hour. - ✔✔three When crossing roads, railroads, high-pressure gas or petroleum pipelines, and waterways, the cable should be placed inside either a ____ or _____ duct for protection. - ✔✔steel, rigid PVC ______ play a major role in route selection. - ✔✔Soil conditions Copper cable should be placed at a minimum depth _____ - ✔✔610 mm (24 in).
- static plow
- Rip plow - ✔✔* earth consisting of soft, loamy soils or loose clays
- tight soils, heavy clays, or combinations mixed with loose rock.
- hardened clay, rocky soil, or other adverse conditions. The major difference is that these types of machines are generally rubber tired to ________ - ✔✔minimize surface damage. Copper cable should be placed at a minimum depth of _____ - ✔✔610 mm (24 in) The three main types of bores are: - ✔✔• Auger bore (jack and bore).
- Horizontal directional drilling (HDD) directional bore.
- Missile bore (impact moling). The auger boring system (jack and bore) should only be used for short bores since it is not very accurate.
- True
- False - ✔✔True ______ is a more accurate method of boring - ✔✔HDD HDD boring machines usually carry an assortment of drills, back reamers, and enough pipe to complete a bore well beyond _______ - ✔✔ 100 m (328 ft). HDD construction can be used in many types of soil conditions and can create a path up to _____ or more with diameters up to ______ for shorter distances. - ✔✔* 1 km (3281 ft)
- 1.2 m (3.28 ft) ______ also known as impact moling, is used for short run cable installations under sidewalks, driveways, roads, and other obstacles. - ✔✔The missile bore system The missile bore from _____ in diameter can be made with this method. - ✔✔51 mm to 152 mm (2 in to 6 in) Casing Types Commonly Used in Boring Operations: - ✔✔• Steel (e.g., RMC or heavy gauge casing steel)
- Plastic (e.g., Schedule 40 and 80 PVC)
- Flexible pipe (HDPE) Aboveground post markers, typically placed at approximate intervals of ________ - ✔✔152 m (499 ft) Aboveground post markers locations or clearly visible from adjacent posts, at a , at a congested area, or at - ✔✔* straight interval of 152 m (499 ft)
- directional change
- curves
- a location of importance such as major utility crossings or at an in ground HH Cable Markers made of - ✔✔* rigid PVC
- flexible plastic
- steel
- concrete aboveground marker posts should have the following information printed on them: - ✔✔- Type of utility (e.g., buried communications cable)
- Owner (e.g., XYZ Inc.)
- Contact number to call for locates
the pole.
- Vertical loading—The weight of the attachments as well as the downward force produced by the guys. For medium and heavy storm loading areas, the weight of ice coatings on attachments should be included.
- Bending moments—The forces produced by devices like (eccentric) transformers or unbalanced tensions at corners and deadends. ____ loading is not considered a factor in the light load areas, but it is included when addressing medium and heavy load areas. _____ loading is a factor everywhere. - ✔✔* Ice
- Wind Poles subjected to heavy transverse loads tend to break at _______. Selecting poles with sufficient strength at ______ to withstand transverse loads is a major consideration for the OSP designer. - ✔✔ground level Transverse loads that must be considered are those caused by wind pressure on: - ✔✔• Cable and support strand.
- Pole-mounted equipment and service drops.
- The pole. A systematic method of summing loads on a pole is to convert all transverse loads into equivalent loads at a point _______ from the top of the pole. A pole that has a breaking strength capable of withstanding the sum of all the equivalent loads at a point _____ from the top of the pole is then selected. - ✔✔0.6 m (2 ft) To determine the class of poles required in a pole line, the OSP designer should consider: - ✔✔• The total number of cables to be placed during the life of the pole line.
- The total weight of the cables.
- The size of the support strands.
- Any guy requirements (corners and deadends).
Nine common pole classes used in OSP construction and their breaking strengths measured _____ from top of pole - ✔✔610 mm (24 in) Selecting poles with sufficient strength at ground level to withstand transverse loads is a major consideration for the OSP designer. True False - ✔✔True Pole height should provide sufficient space for the maximum number of attachments that will be made during the service life of the pole line. The attachment space must include the space between the top of the pole as well as the highest and lowest attachments. For pole lines supporting cable, _______ should be provided at the top of the pole and ________ for each cable attachment. - ✔✔457 mm (18 in) 305 mm (12 in) crossing pole should not be selected as the base pole. True False - ✔✔True Although the following aerial cables would experience such tension under storm loading, the maximum rated cable-pulling tensions are:
- For all cables, except self-supporting cable _______
- For figure-eight self-supporting cable _______
- For dielectric circular self-supporting cable _______ - ✔✔* 2.7 kilonewtons (kN [600 lbf]).
- 14.7 kN (3300 lbf).
- 5.8 kN (1300 lbf).
