Low-Voltage Cabling Practice Test

These questions are part of the practice quiz. Start practicing

• Standard for STP and UTP premises cabling and connectors?
• The cladding diameter in single-mode fiber is ______ microns.
• According to the NEC, the voltage on non-power-limited circuits may not exceed what value?
• All communication cable types except which may be used in cable trays?
• Which type of cable has a minimum bend radius that can range from 10 to 30 times its diameter?
• In UTP cables larger than 600 pairs, what encases the conductors?
• Which shielding grounding option corresponds to grounding the shield at one end?
• What size and type conductors do both STP and STP-A use?
• Which statement about Category 1 and 2 cables is true?
• Optical Fibers are permitted in composite cables that have electric power circuits under
• Which of the following statements reflects NEC guidance on voltage limits for non-power-limited circuits?
• What is the minimum standard cable acceptable for data and voice?
• Which statement is true about Class 3 power sources?
• Copper-clad steel and copper alloys have what drawback compared to pure copper?
• Which statement about Category 1 and 2 cables is true?
• Nonpower-limited circuits (Class 1) must not exceed ______.
• Which color is normally used for the tip of the first five pairs of UTP cable?
• Which statement best reflects the status of Category 1 and 2 cables in modern practice?
• Which type of fiber optic cable is normally used outdoors?
• Which bandwidth designation for Category 6 UTP cable equals 250 MHz?
• Which device allows cable to twist, eliminating winding and tangling of the rope and cable during the pull?
• What material is typically used for outdoor cabling?
• At higher data transfer frequencies, stranding can cause up to ________ more signal attenuation.
• What may be needed when pulling down vertically?
• Power-limited fire alarm circuits in hoist ways must be installed in
• What category is recommended for new data cable installations?
• Which standard number is for STP and UTP premises cabling and connectors?
• Compared with solid wire, stranded wire has more which property?
• Category 1 and 2 cables may exist in which system?
• For Optical fiber circuits, only ________ cables may be installed in plenums.
• What is the frequency bandwidth of Cat6A cable?
• What are the two conductors in a UTP pair called?
• A power fishing system is used primarily to blow or vacuum a ______ through a raceway system.
• What is the nominal impedance per pair for UTP conductors?
• When handling backbone cable, what is the normally required minimum bending radius relative to the cable diameter?
• What term describes the connection point between the service wire and the premises wiring?
• What is considered the primary solution to minimize EMI between low-voltage circuits and EMI sources?
• STP Patch cords have up to ______ more signal loss than solid AWG conductors.
• In Unit Grade 2 residential cabling, what is the minimum at each outlet location?
• Which of the following is a listed pairing for a multi-mode fiber core diameter and cladding?
• What is the frequency bandwidth of Cat6 cable?
• A Class 3 circuit must use a listed Class 3 limited or nonlimited power source because higher-voltage insulation is specified to provide more protection from electric shock.
• A high-temperature insulation that is widely used for communication wiring in plenum-rated cable is ______.
• Which devices allow co-workers to remain informed during the pull?
• Which standard provides fill ratio guidelines for backbone cable installed in conduit?
• In Unit Grade 2, what is the recommended category for the four-pair UTP cable?
• If a heavy cable is pulled vertically from the top, what device is likely required to control the descent?
• In commercial work, the demarcation point is typically within how many feet of the building network entrance cabling?
• What is the most widely used cable for data and voice?
• To limit inductive or radiated EMI use _______.
• Which installation locations are permitted for any listed optical fiber cable?
• Which color is used for the outer jacket to indicate that the cable is part of a communication circuit?
• Which statement describes the distance limits of fiber relative to copper?
• Which of the following is a valid pairing of a multi-mode fiber core diameter and cladding, among those commonly listed?
• Power-limited fire alarm conductors may be placed within 2 inches of insulated power conductors if what condition is met?
• Optical Fiber cable minimum bend radius can range from which to which times the diameter?
• Enhanced Shielded twisted-pair (STP-A) cable has how many separate foil-shielded twisted pairs?
• For high-performance four-pair cables, what is the minimum bend radius relative to diameter?
• The tip conductor is normally connected to which voltage?
• Which article covers network-powered broadband communications systems installed within buildings?
• When conduit is not used in new residential low-voltage construction, cables can be pulled through the finished wall by the use of a _______.
• The physical size of the current-carrying wire is described by which standard?
• A power-limited fire alarm cable that can be used in plenums is marked as
• If unshielded low-voltage circuits are kept close to power conductors, what NEC requirement must be observed?
• Which of the following is true about the maximum backbone distance for multimode fiber?
• Which of the following statements best reflects EMI-reduction guidance?
• Which cable type may not be placed in raceways and boxes along with electric light power, class 1 nonpower-limited fire alarm, and/or medium-power, broadband communication cable unless separated?
• What is the maximum rated tension when pulling Four-pair 24 AWG UTP cable?
• What is the primary solution to reduce EMI between low-voltage circuits and potential EMI sources?
• To prevent electrical shock, fish tapes should
• Coaxial cable may be placed in raceways with other power and communication circuits only if which condition is met?
• This layer in Optical Fiber cable can be Loose or tight.
• Class 2 circuits defined by the NEC as the wiring between the load side of a class 2 limited or nonpower limited source and the connected equipment
• Which category cable has a bandwidth of 250 MHz?
• Which statement correctly identifies the data backbone distance for 100-ohm UTP?
• Single mode optical fiber core is normally how many microns in diameter?
• What is the maximum backbone distance for multi-mode optical fiber?
• What is the maximum pull tension for high-performance cable?
• Should different sizes of cable be pulled together?
• In electrical cable pulls, what should wires be lubricated with before and during the pull?
• In Unit Grade 1 residential cabling, what is the minimum at each outlet location?
• Which statement about pulling methods is true?
• What were the original color codes for Tip, Ring, and Ground wires in telephone equipment?
• Which NEC Article covers Remote Control, Signaling, and Power-Limited Circuits?
• RG6 and RG11 coaxial cable is used primarily in
• What is the typical conductor size range for UTP cables?
• This reflective surface in Optical Fiber Cable prevents the light signals from escaping the core.
• Which NEC Article covers Instrumentation Tray Cable?
• Communications circuits are covered in NEC Article
• Which TIA standard provides guidelines for installing cable for various types and grades of communication services in single- and multi-tenant residential structures?
• Which cable uses four pairs of conductors for work area connections?
• Which NEC Article covers Instrumentation Tray Cable?
• The guideline stating that horizontal pulls between pull points should be no longer than 98' applies to which portion of the cabling?
• Low Voltage cable typically contains conductors with solid wire sizes ranging from which range?
• Which NEC article covers installation specifications for class 1, 2, and 3 applications? (Alternate phrasing)
• For communication circuits, which cables may be installed in plenums or listed plenum raceways?
• Power-limited circuits (Class 1) must have a power supply that is not more than what values?
• Which NEC Article is associated with Optical Fiber Cables and Raceways?
• If holes are drilled less than 1-1/2 inches from the edge of a stud, what must be installed on the edge of the stud?
• Multi-pair UTP cable is generally used for what?
• An advantage of optical fiber cable is
• Which NEC Article covers Community Antenna Television and Radio Distribution Systems?
• In high-noise environments, shielding and/or ______ may be required.
• Which statement best describes the purpose of TIA Standard 570-B-1?
• To reduce EMI, unshielded low-voltage circuits should be separated from power circuits by a minimum distance of how many inches?
• Which standard number applies to residential telecommunication infrastructure?
• What is the frequency bandwidth of Cat 5e cable?
• Multi-mode fiber is typically used for ____ distances.
• The guidelines in TIA Standard 570-B-1 apply to which building types?
• Mandrels should be approximately what percent of the conduit size?
• Screened Twisted-Pair (ScTP) cable provides very good rejection of which type of interference?
• One way to avoid EMI problems is to ________.
• In a commercial building, the space that serves as the junction between vertical backbone and horizontal wiring is known as the
• Category 6 UTP cable has a bandwidth up to ______ MHz
• The downside to copper-clad steel and copper alloys is that they have ______.
• The two most common core diameters in multi-mode fiber are ______.
• Which term describes the layer that surrounds the core and reflects light back into it in an optical fiber?
• To reduce EMI, it is recommended that unshielded low-voltage circuits be separated from power circuits by a minimum distance of what?
• Which cabling installation is mounted above ground?
• A Limited-use communication cable that is suitable for use in dwellings and raceways is marked as
• Horizontal pulls for backbone communication cable installations must not exceed how many feet between points?
• Single-mode optical fiber is normally how many microns in diameter?
• Where must communication circuit conductors or cables be attached?
• Fiber optic cables are advantageous because they can handle
• Which NEC Article covers Fire Alarm Systems?
• Which standard covers plenums usage for communication cabling?
• Which NEC Article covers Optical Fiber Cables and Raceways?
• Some manufacturers add a tracer to the tip conductor for improved pair identification. What is this tracer called?
• Class 2 and 3 circuits shall be separated by at least ______ from all power conductors and medium-power, network-powered broadband communication cables.
• Which bandwidth corresponds to Cat5e?
• In optical fiber cables, what term describes the nonmetallic component under the jacket that provides tensile strength?
• STP-A is distinguished by having how many separate foil-shielded twisted pairs?
• At a residential service location, the telephone utility cable normally terminates at which component?
• Single -core fiber has a core diameter of ______ microns.
• Which color is normally used for the tip of the first five pairs of UTP cable?
• What is the maximum backbone distance for single-mode optical fiber?
• Which point marks the boundary between service wiring and premises wiring?
• When installing undercarpet cabling, you should avoid what?
• On a shielded cable, floating the ground is a method used when
• Which tool is used to clear obstructions in conduit, especially where bends occur?
• In high-noise environments, which component may be added to further reduce EMI?
• Which marking identifies a limited-use communication cable suitable for dwellings and raceways?
• Which practice is recommended to avoid EMI problems in low-voltage installations?
• For outlet UTP cable, the bend radius shall not be less than how many times the cable diameter?
• Vertical pulls from above typically require which equipment to control speed and tension?
• The most common material used for conductor insulation and cable jackets is ______.
• The installation specifications for class 1, 2, and 3 applications are located in _______.
• A Test Pull will detect any hidden obstructions in the conduit before pulling. What is the correct choice?
• Grade 1 residential service excludes which service?
• What device clears obstructions in conduit, especially where bends occur?
• Which device helps prevent uncontrolled unreeling by absorbing the weight of the cable during a pull?
• Which statement about UTP cables usage is true?
• The standard material used for current carrying wire of conductors in Low-Voltage cable is ______.
• Which pathway component is used to limit inductive or radiated EMI along cabling paths?
• Which device is typically used as the termination point for the residential telephone service?
• Which NEC Article covers Closed Loop and Programmed Power Distribution?
• Which statement correctly pairs minimum and recommended categories for data cabling?
• Low-Voltage cable typically contains conductors that have solid wire sizes ranging from ______ AWG to 12 AWG.
• Which conductor is connected to the positive DC signal voltage?
• A vertical pull of a heavy cable from the top down is likely to require _______.
• Stranded wire of the same gauge as solid wire is larger in diameter.
• Conduit bends of ten times the conduit diameter must exist for which type of cable sheath?
• Which statement best describes the impact of using stranded wire at high data frequencies compared to solid wire of the same gauge?
• Which separation distance is required between Class 2/3 circuit conductors and power conductors or medium-power broadband cables?
• Which category provides 16 MHz bandwidth?
• When pulling a cable, the pulling force must not exceed what?
• RG6 and RG11 both have a nominal impedance of
• Which cable type includes a foil shield and a drain wire?
• Which NEC Article covers Network-Powered Broadband Communications Systems?
• Which item is installed to prevent cables from nails or screws in finished walls?
• The conduit inside is cleaned and polished before the cable is pulled by which tool?
• If the pathway is open and the cables will be supported by j-hooks or their equivalent, spacing must support no more than ______ of cable weight.
• Single-mode fiber is typically for ____ distances.
• Which installation is buried directly in the ground?
• In Unit Grade 2, how many 75-ohm coaxial cables are required at each outlet?
• Which installation is described as installed underground in conduit or duct?
• Which type of cable has a minimum bend radius of 4 times its diameter?
• The UTP cable tip color for the first five pairs is ______.
• When routing power cables, at what degree angle should they cross other cables when possible?
• Standard for bonding and grounding requirements for commercial buildings?
• Which statement identifies the material described as 'annealed (soft) solid copper' in low-voltage conductor construction?
• Which conductor is connected to the negative signal voltage?
• Which fiber type supports the greatest backbone distance?
• What is the maximum backbone distance for 50 or 62.5 multimode optical fiber?
• What unit is used to express the maximum pull tension for high-performance cable?
• Loose-buffered fiber optic cable is normally used
• Which NEC Article covers Communications Circuits?
• Which feature is typical of the outer jackets on most communications cables?
• Which device is used to maintain communication during a pull?
• At a residential service location, the telephone utility cable normally terminates at a Network Interface Device
• To minimize EMI between unshielded low-voltage circuits and power circuits, what minimum distance is recommended?
• In cable trays, which statement is true about communication cables?
• What unit is used to express the maximum hook load for cables on an open pathway?
• Which cabling installation is used indoors?
• To prevent cables from being damaged by drywall screws or nails, a _______ is installed.
• The ring conductor is connected to which voltage?
• Which type of cable is used for connection to work area outlets?
• ScTP includes a foil shield and a drain wire that must be grounded. What must be grounded?
• Which NEC Article covers Closed Loop and Programmed Power Distribution?
• Which technique or tool is used to detect hidden obstructions in conduit before pulling the cable?
• For trade sizes above 2 inches, the bends should be at least how many times the conduit diameter?
• Which type of cable is designed to reject high-frequency electrical interference due to shielding?
• Which range of solid conductor sizes is typical for low-voltage cables?
• Which statement describes the general characteristic of copper alloys relative to pure copper in terms of current-carrying ability?
• The foil shields in STP provide what kind of ratio throughout the bandwidth?
• Primarily used as cable jacketing material is ______.
• What is the maximum backbone distance for 100-ohm UTP for voice applications?
• Which statement accurately describes optical fiber circuits in composite cables with power circuits under 600V?
• According to TIA 570-B-1, how many communication outlets are recommended per residential unit space (such as bedrooms, studies, or kitchens)?
• Standard for Residential telecommunication infrastructure?
• In a single-tenant dwelling, the demarcation point is located within how many inches of entering the premises?
• According to ANSI/TIA/EIA-569-B guidelines, how long are horizontal pulls between pull points allowed to be?
• Which NEC Article is associated with Community Antenna Television and Radio Distribution Systems?
• Network-powered broadband communications system installation within buildings is covered in NEC Article
• Single-core fiber core diameter is 9 microns.
• Which NEC Article would you reference for Remote Control, Signaling, and Power-Limited Circuits?
• Which device is used to allow pulling cables through finished walls when conduit is not used?
• The two most common core diameters in multi-mode fiber are
• The minimum grade of UTP cable acceptable for new telecommunications installation is category
• In pulling operations, which item is used to lubricate wires before and during the pull?
• To minimize emission from power conductors, you should use ______.
• Nonmetallic fiber strands under the jacket that provide strength and flexibility to Optical Fiber Cable are called
• Which of the following is the minimum recommended separation distance between unshielded low-voltage circuits and power circuits to reduce EMI?
• Conductor descriptions include two elements: insulation-covered wires and current-carrying material, which can be insulated or uninsulated. Which statement best describes this description?
• RG6 and RG11 coaxial cables have a nominal impedance of
• Which material is most commonly used as conductor insulation and cable jackets in low-voltage cables?
• What does NEC require for low-voltage and optical fiber cables used for installation?
• Standard for pathways and spaces?
• Which of the following is NOT a listed raceway for power-limited fire alarm circuits in hoistways?
• In Unit Grade 1, at each outlet location, how many coaxial cables are required?
• What is the maximum rated tension when pulling Series 6 coaxial cable?
• For trade sizes up to 2 inches, conduit bends should be at least how many times the conduit diameter?
• The _______ allows the pulling line or rope on the cable to twist. Eliminates any tangling of the rope and cable during the pull.
• Class 2 and 3 circuits shall not be placed in cables, compartments, cable trays, outlet boxes or raceways with electric power circuits.
• Tight-buffered fiber optic cable is used mostly
• The NEC allows power-limited fire alarm circuit conductors to be within 2 inches of insulated power conductors if what condition is met?
• Category 1 and 2 cables are also called what?
• The conductors and cables of the class 2 and 3 circuits are separated from the other conductors and cables by at least ______.
• Which device prevents the weight of a large, heavy cable from causing uncontrolled unreeling?
• What is the frequency bandwidth of Cat3 cable?
• Which statement about separation of Class 2 and Class 3 circuits from other conductors is correct?
• In an optical fiber cable, a reflective boundary is created by the difference in purity between the core and the ______.
• Which statement correctly identifies a multi-mode fiber core diameter option?
• Class 2 and 3 circuit conductors or cables shall not be strapped, taped, or attached by any means to ________________________________
• Stranded wire has more ________ compared to solid.
• Under which condition is coaxial cable allowed to share raceways with power and other circuits?
• What is the minimum recommended distance between electrical power cables and electrical/electronic equipment and unshielded low-voltage cables?
• Fiber optic cable is not subject to the same distance limits as copper.
• Which distance value is associated with single-mode optical fiber backbone distance?
• If you are wiring a new building for data networks, you should plan for at least which category?
• The exterior braid shield in STP reduces what type of noise and is immune to other EMI?
• STP patch cords use size ______ stranded copper conductors.
• During handling, installing, bending, or creating service loops with backbone cable, the minimum bending radius is normally how many times the diameter?
• If pulling cable in conduit becomes difficult, a
• In a commercial structure, what is the function of the telecommunications room?