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Voice Data Video (VDV) Practice Test latest
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- What is the minimum voice cabling type for a residential application? a. 4-pair, category 2 b. 4-pair, category 3 c. 4-pair, category 5 d. 4-pair, station wire: b. 4-pair, category 3
- T he cable voltage ratings on communications wires and cables be marked on the cable or on the under carpet communications wire. a. must b. must not c. shall d. shall not: d. shall not REF: [NEC] 800.
- What is the smallest size grounding conductor that can be used for a CATV system? a. 18 AWG b. 14 AWG c. 12 AWG d. 6 AWG: b. 14 AWG REF: [NEC] 820.100(A)(3)
- Which type of communication cable would you use between floors?
2 / 101 a. CM b. CMP c. CMG d. CMR: d. CMR REF: [NEC] 800.179(B) or 800.154(a)
- The "C" in optical fiber cabling marking means. a. compliance b. conductive c. composite d. copper: b. conductive REF: [NEC]
- Class 1 Remote Control & Signaling Circuits power output of the source shall . a. not be required to be limited b. be required to be limited c. be limited to 1000 VA d. both A & C: a. not be required to be limited REF: [NEC] 725.41(B)
- Direc t buried CATV coaxial cables shall be separated by at least inches from conductors of any light or power or Class 1 circuit. a. 6 b. 12 c. 24 d. 36: b. 12 REF: [NEC] 820.47(B)
4 / 101 communication network. c. be listed as being suitable for electrical connection to a communications network including temporary connection of testing equipment for mainte-nance orrepair. d. none of the above: b. be listed as being suitable for electrical connection to a communication network. REF: [NEC] 800.170, 800.
- What type of coaxial cable could be substituted for CATV cable? a. CMX b. CATVP c. FPLP d. all of the above.: b. CATVP REF: [NEC] 820.154(b)
- Access to electrical equipment be denied by an accumulation of optical fiber cables that removal of panels including suspended ceiling panels. a. shall not, prevents b. shall not, impedes c. shall not, conveys d. none of the above: a. shall not, prevents REF: [NEC] 770.
- Which group of optical fiber cable markings is not correct? a. OFNP, OFCP, OFNR b. OFNP, OFNX c. OFCG, OFC d. OFNP, OFNR: b. OFNP, OFNX REF: [NEC] 770.
- OFNP is. a. nonconductive optical fiber general purpose cable
5 / 101 b. optical fiber non-plenum cable c. optical fiber conductive plenum cable d. nonconductive optical fiber plenum cable.: d. nonconductive optical fiber plenum cable. REF: [NEC] 770.
- What are the permitted substitutions for a CL3R? a. CMP, CL3P, CMR b. CMP, CL3P, CL2P c. CMP, CL3P, CL2P, CMR, CL3R d. CL3R, CMG, CM, PLTC: a. CMP, CL3P, CMR REF: [NEC] 725.154(A)
- CL2 nomenclature stands for? a. Communication Level 2 b. Class 2 c. Conductive Load x d. none of the above: b. Class 2 REF: [NEC] 725.
- Communication wires and cables shall have a voltage rating of not less than . a. 100 Volts b. 300 Amps c. 300 Volts d. 600 Volts: c. 300 Volts REF: [NEC] 800.
- What article would you find information regarding Radio & Television equip-ment? a. Article 720 b. Article 725 c. Article 770
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22. A
parallel circuit, having three branches, has a total resistance of if the branches had the following resistance - 100 ohms, 100 ohms and 50 ohms. a. 25 Ohms b. 75 OHms c. 100 Ohms d. 250 Ohms: a. 25 Ohms
- Where practical, a separation of how much distance shall be maintained between communications wires and cables on buildings and lightning con-ductors? a. 2.5 m (8 feet) b. 1.8 m (6 feet) c. 300 mm (12 inches) d. 1.0 m (40 inches): b. 1.8 m (6 feet) REF: [NEC] 800.
- Communication systems in patient care areas (hospitals) should be? a. Installed in type CMHC cables b. Installed in separate metal raceways c. Separated at least 12 inches from power conductor raceways d. Constructed with equivalent insulation and isolation to that required for the electrical distribution system: d. Constructed with equivalent insulation and isolation to that required for the electrical distribution system REF: [NEC] 517.
- When tagging abandoned communications cables for future use, what is the requirement of the tag? a. it should identify when the cable will be used b. it should be made of plastic and have a printed label.
8 / 101 c. it should tell where the cable orginates and is terminated
10 / 101 d. 40 feet: c. 30 feet REF: [NEC] 820.106(A)(1), 820.
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- Direct-buried separation of underground CATV radio & television conduc-tors from conductors of any light or power circuits or class 1 circuits (disregard exceptions). a. 12 inches b. 18 inches c. 24 inches d. 36 inches: a. 12 inches REF: [NEC] 820.47(B)
- Access to electrical equipment shall not be denied by an accumlation of communications wires and cables that prevents removal of , including suspended ceiling panels. a. covers b. panels c. doors d. boxes: b. panels REF: [NEC]
- Unlisted, outside plant coaxial cable for community antenna television systems can be installed in cable trays where the cable enters from outside the building, measured from the point of entrance, does not exceed: a. 20 feet b. 30 feet c. 40 feet d. 50 feet: d. 50 feet REF: [NEC] 820.
- Which of the following types of fiber optic cable can be
13 / 101 c. OFNP and OFCP d. OFNR ad OFCR: c. OFNP and OFCP REF: [NEC] 770.179 (a)
- Class 1, Class 2 and Class 3 circuits should be identified at terminal and junction boxes because? a. the wires will not be mistaken for abandoned cables b. it will assist the installer technician during installation c. it will eliminate the need for a color code of all conductors in the circuit d. it prevents unintentional interference with other circuits during testing and servicing: d. it prevents unintentional interference with other circuits during testing and servicing REF: [NEC] 725.
- What is the minimum separation between radio and television equipment receiving station outdoor lead-in conductors and conductors of circuits not over 150 volts between conductors where the permanent separation of all conductors involved is ensured? a. 3 inches b. 4 inches c. 6 inches d. 8 inches: b. 4 inches REF: [NEC] 810.18(A)
- If a building or structure served has no intersystem bonding termination for communication circuits, which of the following can not serve as a connec-tion point for the grounding conductor? a. the service equipment enclosure b. the metallic power service raceway
14 / 101 c.the steam or hot water pipe in contact with earth not less than 1. m (6 feet) d. the grounded interior metal water piping system within 1.5 m ( feet) from its point of entrance to the building: c. the steam or hot water pipe in contact with earth not less
16 / 101 (classified) loca-tion c. primary protectors can be installed in a class 2, division 1 occupancy, but
17 / 101 not in a class 1 division 1 or 2 occupancy d. primary protectors are allowed to be installed in any class 1, 2 or 3 oc-cupancy when installed in a listed metal cabinet, connected to the building grounding electrode system.: b. primary protectors shall not be located in any hazardous (classified) location REF: [NEC] 800.90(C)
- When installed, a listed primary protector is applied on each community antenna and radio distribution cable external to the premises, but it shall not be located in an hazardous (classified) location or in the vicinity of what kind of materials? a. volatile b. combustible c. flammable d. easily ignitable: d. easily ignitable REF: [NEC] 820.93(D)
- A cable is required to have a minimum of how many conductors? a. one b. two c. three d. four: b. two REF: [NEC] 800.
- Optical Fiber Cable installed in hazardous (classified) locations should be type: a. OCAP b. OFCP c. OFPP d. OFCC: b. OFCP REF: [NEC] 770.154(b) and 770.3(A)
19 / 101 on the wire REF: [NEC] 800.133(A)(2) Exception #
- Com munity antenna television grounding conductors shall be.
20 / 101 a. bare copper b. bare aluminum c. insulated d. any of the above: d. any of the above REF: [NEC] 820.100(A)(1)&(2)
- What size outdoor antenna conductor shall be used for a receiving station, where at the maximum open span length is 150 feet, and the material is hard-drawn copper? a. 20 AWG b. 19 AWG c. 14 AWG d. 12 AWG: c. 14 AWG REF: [NEC] 810.16(A)
- In installations where an optical fiber cable is exposed to contact with elec-tric light or power conductors and the cable is terminated on the outside of the building, the non-current carrying members either grounded as specified in 770.100 or interrupted by an insulating joint or equivalent device. a. shall not b. shall be c. should d. should not: b. shall be REF: [NEC] 770.93(B)
- For new construction, a minimum of one communications outlet shall be installed within the dwelling unit. a. in the entry way
