Spring Test 17 due 06/14/2013 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The NEC defines cable as a cylindrical assembly composed of a conductor centered inside a metallic tube or shield, separated by a dielectric material, and usually covered by an insulating jacket. a. IP c. optical fiber e. UTP b. coaxial d. DSL 2. Unused openings in metal boxes, panels, and other enclosures shall. a. be open b. be closed to afford protection c. not be required to be closed if on the bottom of the enclosure d. not be required to be closed if the enclosure is in a dry location 3. The path to ground from circuits, equipment, and conductor enclosures shall. I. have sufficiently low impedance to limit the voltage to ground and to facilitate the operation of the circuit protective devices in the circuit II. be capable of safely carrying the maximum fault current likely to be imposed on it III. be permanent and electrically continuous a. I only b. II only c. III only d. I, II & III Figure 402-01 Rated voltage must be applied to each transformer primary winding. Transformer Ratings: 240 x 480 to 120/240-volt 4. Which of the control transformers, shown in Figure 402-01, is correctly connected to operate the circuit? The motor circuit is 240-V, 3Ø and the coil rating is 120 V. a. II b. IV c. III d. I e. none of these 5. Which of the control transformers, shown in Figure 402-01, is correctly connected to operate the circuit? The motor circuit is 480-V, 3Ø and the coil rating is 240 volts. a. II b. IV c. III d. I e. none of these
6. Which of the control transformers, shown in Figure 402-01, is correctly connected to operate the circuit? The motor circuit is 480-V, 3Ø and the coil rating is 120 V. a. II b. IV c. III d. I e. none of these 7. All splices, joints, and free ends of conductors are required to be covered with an insulation the conductor. a. as thick as b. equivalent to c. thicker than d. larger than 8. The is the connection between the grounded circuit conductor and the equipment grounding conductor at the service. a. main bonding jumper d. grounding electrode conductor b. equipment bonding jumper e. supply side bonding jumper c. equipment grounding conductor 9. Where added to an existing installation, connection of a metal raceway to the equipment grounding conductor is not required if the raceway is used to protect 14/2 (no ground) Romex, is guarded against contact by persons, is less than feet in length, and is not within reach of ground or grounded metal. a. 6 b. 8 c. 10 d. 25 10. Given: A metal junction box has 27 cubic inches and contains a total of six 12 AWG wires. Additional conductors size 10 AWG need to be added in the box. No grounding conductors, devices or fittings are contained in the box. What is the MAXIMUM number of 10 AWG conductors that may be added to this box? a. 2 b. 5 c. 6 d. 8 11. Where a permanent barrier is installed in a pull box, each section is considered as. a. permanent barriers are not allowed c. 60% of the box b. a separate box d. the same box 12. Conduits mounted on indoor walls or in rooms that are hosed down frequently must between the mounting surface and the conduit. a. have a permanent 1 / 4 -inch air space b. be separated by insulated bushings c. be separated by noncombustible tubing d. none of these 13. Where NM cable is used, the cable assembly, including the sheath, shall extend into the box not less than. a. 1 / 2 " b. 3 / 4 " c. 1 / 4 " d. 1" 14. Unsupported runs of armored cable shall be permitted to be unsupported where the cable is not more than inches at terminals where flexibility is necessary. a. 24 b. 30 c. 36 d. 48 15. Where practicable, network-powered broadband communications cables on poles shall be located the electric light, power, Class 1, or non power-limited fire alarm circuit conductors and shall not be attached to a crossarm that carries electric light or power conductors. a. below b. above c. at the same height as 16. An insulated conductor that is intended for use as a grounded conductor, where contained within a flexible cord, shall be identified by or by other means permitted. I. a white or gray outer finish II. one or more white stripes on other than green insulation III. a green outer finish IV. a green outer finish with one or more yellow stripes
a. I only b. I or II only c. III only d. III or IV only 17. Conductors shall be unless otherwise provided in the Code. a. lead b. stranded c. copper d. aluminum 18. Type, a flat cable assembly, is an assembly of parallel conductors formed integrally with an insulating material web specifically designed for field installation in surface metal raceway. a. FCC b. FC c. TC d. SNM 19. plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used. a. Metal b. Plastic c. Leather d. Wooden 20. Not more than one conductor shall be connected to the grounding electrode by a single clamp or fitting unless the clamp or fitting is. a. cast bronze or brass d. all of these b. listed for multiple conductors e. none of these c. 0.043" in thickness 21. optical fiber cables contain optical fibers and current-carrying electrical conductors. a. Composite b. Nonconductive c. Conductive 22. A(n) branch-circuit supplies two or more receptacles or outlets for lighting and appliances. a. appliance c. individual e. general purpose b. multiwire d. lighting 23. In a partially completed building, an electrician plugs into a receptacle with an extension cord. To comply with the NEC, the electrician must. a. be sure that the receptacle has GFCI protection b. have permission from the occupants of the building c. be sure the cord has twist-lock connections d. use a minimum size cord of 12/4 AWG 24. Bonding all piping and within the premises will provide additional safety. a. water heaters b. pumps c. metal air ducts d. none of these 25. Unless identified for use in the operating environment, no conductors or equipment shall be located in having a deteriorating effect on the conductors or equipment. I. damp or wet locations II. where exposed to gases, fumes, vapors, liquids, or other agents a. I only b. both I and II c. II only d. neither I nor II 26. Before you energize a motor for the first time, you want to make certain that it has the proper voltage. You check the voltage at the disconnect for the motor and find that the voltage from AØ to ground is 120 volts, BØ to ground is 208 volts, and CØ to ground is 120 volts. This circuit originates in a panel that is supplied by a system. a. 277/480-volt, 3Ø, 4 wire d. 120/208-volt, 3Ø, 4 wire b. 480-volt, 3Ø, 3 wire e. 120/240-volt, 3Ø, 4 wire c. 240-volt, 3Ø, 3 wire 27. According to the NEC, which of the following statements is true about installing listed or labeled equipment? a. The equipment may be installed in whatever manner the contractor determines best. b. The equipment shall be installed in accordance with the instructions. c. The equipment only needs to be listed or labeled if it is installed in an industrial
environment. d. The equipment may be subject to listed or labeled equipment if it is determined to be acceptable by the contractor. 28. When UF cable is supplied from a GFCI-protected, residential branch circuit that is rated 15 amps at 115 volts, the minimum burial depth is inches when the cable is installed underground to an outdoor post light. a. 24 b. 18 c. 12 d. 6 29. Operation of equipment in excess of normal, full-load rating, or of a conductor in excess of rated ampacity that, when it persists for a sufficient length of time, would cause damage or dangerous overheating, is called. I. a short circuit II. a ground fault III. an overload a. I & II only c. I & III only e. I, II & III b. I only d. III only 30. Conductors of AC or DC circuits rated 600 volts or less shall be permitted to occupy the same conduit if. a. all conductors shall have an insulation rating equal to the maximum circuit voltage applied to any conductor in the conduit b. all conductors have a 600-volt insulation rating c. a dividing barrier in the raceway separates the AC and DC circuit conductors d. none of these; AC and DC conductors are not permitted in the same raceway 31. Which of the following is not true concerning temporary wiring? a. All lamps shall be protected by a suitable fixture or guard. b. Handle ties are permitted to disconnect multiwire branch circuits. c. Tests shall be performed on cords and receptacles and plugs for correct attachment to the equipment grounding conductor. d. Temporary power for Christmas decorative lighting shall not exceed 60 days. 32. A type of surface, flush, or freestanding raceway, designed to hold conductors and receptacles, assembled in the field or at the factory is called a. a. busway c. wireway e. multioutlet assembly b. cablebus d. cable tray 33. For a 1000-volt system, the distance between each cable or conductor entry inside the box and the opposite wall of the box shall not be less than times the outside diameter, over sheath, of the largest cable or conductor. a. 6 b. 18 c. 36 d. 48 34. Which of the following may not be used in damp or wet locations? a. type AC armored cable c. electrical metal tubing b. open wiring d. rigid metal conduit 35. The use of is prohibited for connection of a grounding conductor to equipment. a. sheet metal screws c. clamps b. pressure connectors d. lugs 36. What is the minimum thickness of metal for a 6" 4" 3 1 / 4 " box? a..0625" b..0747" c. 15 SMG d. 16 SMG 37. The connection point between the facilities of the serving utility and the premises wiring is called the. a. service point c. metering point
b. service equipment d. main disconnect 38. In walls or ceilings of noncombustible material, boxes shall be installed so that the front edge of the box will not be set back of the finished surface more than inch(es). a..125 b..5 c..1875 d..25 e..0625 39. A receptacle mounted more than eight feet above the finished floor is considered. a. ceiling mounted c. isolated b. not readily accessible d. inaccessible 40. Which answer best completes the following sentence describing the Code requirements for the use of short-radius, capped elbow conduit bodies containing conductors smaller than 6 AWG? Capped elbow type conduit bodies. a. are not permitted by Code b. may be used to enable the installation of the raceway c. may contain devices d. may contain splices and taps 41. Readily accessible means capable of being reached quickly for operation, inspection, or service without. a. opening locked doors b. having to climb over or remove obstacles c. having to use a portable ladder d. any of these 42. All conductors of a circuit are required to. I. be in the same raceway II. be installed in close proximity in the same trench III. be the same size a. III only b. I only c. I, II & III d. I & II only 43. Wiring methods installed behind panels that allow access, such as the space above a dropped ceiling, are required to be according to their applicable articles. a. supported c. in a metal raceway b. painted d. all of these 44. A device intended to open under short circuit or ground fault is selected based on its rating. a. operating b. interrupting c. ampacity d. temperature 45. covers and plates shall be permitted with nonmetallic boxes. I. Nonmetallic II. Metal a. I only b. II only c. either I or II d. neither I or II 46. Underground cable installed under a building shall be in a that is extended beyond the outside walls of the building. a. sleeve b. duct bank c. gutter d. raceway 47. An electric circuit that controls another electric circuit through a relay is referred to as a(n) circuit. a. automatic c. remote-control e. equipment b. motor control d. individual 48. Induction heating coils that operate or may operate at a voltage greater than 30 volts AC shall be to protect personnel in the area. I. isolated II. made inaccessible by location III. enclosed in a nonmetallic enclosure IV. enclosed in a split metallic enclosure
a. I or III only c. I, II, or IV only b. I, II, or III only d. I, II, III, or IV 49. The MAXIMUM number of 10 AWG conductors permitted in a 4" 1 1/4" octagon metal junction box is. a. 2 b. 4 c. 5 d. 6 50. Equipment is considered to be accessible when. a. it is not guarded by locked doors c. it is not equipped with a locking cover b. a ladder is required to reach it d. both a and b 51. To settle a disagreement between an inspector and a contractor foreman, the would have the final say. a. local authority having jurisdiction c. IBEW b. local electrical board d. engineer 52. Voltage between the hot (ungrounded) conductors on FCC cable shall not exceed volts. a. 50 b. 300 c. 150 d. 600
Spring Test 17 due 06/14/2013 Answer Section MULTIPLE CHOICE 1. ANS: B 2011 NEC: 820.2 PTS: 1 REF: 2011 NEC: 820.2 OBJ: 434 NEC Worksheet NAT: 434 NEC ABank 2. ANS: B 2011 NEC: 110.12(A) PTS: 1 REF: 2011 NEC: 110.12(A) OBJ: 422 NEC Worksheet 3. ANS: D 2011 NEC: 250.4(B) PTS: 1 REF: 2011 NEC: 250.4(B) OBJ: 423 NEC Worksheet NAT: 423 NEC ABank 4. ANS: A Ugly s/ferm s PTS: 1 REF: Gen Knowledge OBJ: Obj 402.1 Worksheet NAT: Obj 402.1 ABank 5. ANS: C Ugly s/ferm s PTS: 1 REF: Gen Knowledge OBJ: Obj 402.1 Worksheet NAT: Obj 402.1 ABank 6. ANS: B Ugly s/ferm s PTS: 1 REF: Gen Knowledge NAT: Obj 402.1 ABank 7. ANS: B 2011 NEC: 110.14(B) PTS: 1 REF: 2011 NEC: 110.14(B) OBJ: 422 NEC Worksheet 8. ANS: A Defn: Bonding Jumper-Main PTS: 1 REF: OBJ: Obj 419.2 Worksheet NAT: Obj 419.2 ABank 9. ANS: D 2011 NEC: 250.86 Exc 1 PTS: 1 REF: 2011 NEC: 250.86 Exc 1 OBJ: 423 NEC Worksheet NAT: 423 NEC ABank 10. ANS: B
2011 NEC: T. 314.16(B) PTS: 1 REF: 2011 NEC: T. 314.16(B) OBJ: Obj 419.4 Worksheet NAT: Obj 419.4 ABank 11. ANS: B 2011 NEC: 314.28(D) PTS: 1 REF: 2011 NEC: 314.28(D) NAT: Obj 419.3 ABank 12. ANS: A 2011 NEC: 300.6(D) PTS: 1 REF: 2011 NEC: 300.6(D) OBJ: Obj 421.1 Worksheet NAT: Obj 421.1 ABank 13. ANS: C 2011 NEC: 314.17(C) PTS: 1 REF: 2011 NEC: 314.17(C) NAT: Obj 419.3 ABank 14. ANS: A 2011 NEC: 320.30(D)(2) PTS: 1 REF: 2011 NEC: 320.30(D)(2) NAT: Obj 420.3 ABank 15. ANS: A 2011 NEC: 830.44(A)(1) PTS: 1 REF: 2011 NEC: 830.44(A)(1) OBJ: 434 NEC Worksheet NAT: 434 NEC ABank 16. ANS: B 2011 NEC: 200.6(C) PTS: 1 REF: 2011 NEC: 200.6(C) OBJ: Obj 420.1 Worksheet NAT: Obj 420.1 ABank 17. ANS: C 2011 NEC: 110.5 PTS: 1 REF: 2011 NEC: 110.5 OBJ: 422 NEC Worksheet 18. ANS: B 2011 NEC: 322.2 PTS: 1 REF: 2011 NEC: 322.2 OBJ: Obj 420.4 Worksheet NAT: Obj 420.4 ABank 19. ANS: D 2011 NEC: 110.13(A) PTS: 1 REF: 2011 NEC: 110.13(A) OBJ: 422 NEC Worksheet 20. ANS: B 2011 NEC: 250.70 PTS: 1 REF: 2011 NEC: 250.70 OBJ: 423 NEC Worksheet NAT: 423 NEC ABank 21. ANS: A
2011 NEC: 770.2 PTS: 1 REF: 2011 NEC: 770.2 OBJ: 434 NEC Worksheet NAT: 434 NEC ABank 22. ANS: E Defn: Branch Circuit-General Purpose PTS: 1 REF: NAT: Obj 419.2 ABank 23. ANS: A 2011 NEC: 590.6(A) PTS: 1 REF: 2011 NEC: 590.6(A) OBJ: 428 NEC Worksheet NAT: 428 NEC ABank 24. ANS: C 2011 NEC: 250.104(B) I-Note No. 1 PTS: 1 REF: 2011 NEC: 250.104(B) I-Note No. 1 OBJ: 423 NEC Worksheet NAT: 423 NEC ABank 25. ANS: B 2011 NEC: 110.11 PTS: 1 REF: 2011 NEC: 110.11 OBJ: 422 NEC Worksheet 26. ANS: E Ferm s/ugly s PTS: 1 REF: Gen Knowledge NAT: Obj 402.1 ABank TOP: Voltage System ID 27. ANS: B 2011 NEC: 110.3(B) PTS: 1 REF: 2011 NEC: 110.3(B) 28. ANS: C 2011 NEC: T. 300.5;Col. 4 PTS: 1 REF: 2011 NEC: T. 300.5;Col. 4 NAT: Obj 420.2 ABank 29. ANS: D Defn: Overload PTS: 1 REF: OBJ: Obj 419.2 Worksheet NAT: Obj 419.2 ABank 30. ANS: A 2011 NEC: 300.3(C)(1) PTS: 1 REF: 2011 NEC: 300.3(C)(1) OBJ: Obj 421.1 Worksheet NAT: Obj 421.1 ABank 31. ANS: D 2011 NEC: 590.3(B) PTS: 1 REF: 2011 NEC: 590.3(B) NAT: 428 NEC ABank
32. ANS: E Defn: Multioutlet Assembly PTS: 1 REF: OBJ: Obj 419.2 Worksheet NAT: Obj 419.2 ABank 33. ANS: C 2011 NEC: 314.71(B)(1) PTS: 1 REF: 2011 NEC: 314.71(B)(1) OBJ: Obj 419.3 Worksheet NAT: Obj 419.3 ABank TOP: Box Fill 34. ANS: A 2011 NEC: 320.10(4) PTS: 1 REF: 2011 NEC: 320.10(4) NAT: Obj 420.3 ABank 35. ANS: A 2011 NEC: 250.8 PTS: 1 REF: 2011 NEC: 250.8 OBJ: 423 NEC Worksheet NAT: 423 NEC ABank 36. ANS: A 2011 NEC: 314.40(B) PTS: 1 REF: 2011 NEC: 314.40(B) OBJ: Obj 419.3 Worksheet NAT: Obj 419.3 ABank 37. ANS: A Defn: Service Point PTS: 1 REF: NAT: Obj 419.2 ABank 38. ANS: D 2011 NEC: 314.20 PTS: 1 REF: 2011 NEC: 314.20 OBJ: Obj 419.3 Worksheet NAT: Obj 419.3 ABank 39. ANS: B Defn: Accessible-Readily PTS: 1 REF: NAT: Obj 419.2 ABank 40. ANS: B 2011 NEC: 314.16(C)(3) PTS: 1 REF: 2011 NEC: 314.16(C)(3) OBJ: Obj 419.3 Worksheet NAT: Obj 419.3 ABank TOP: Box Fill 41. ANS: D Defn: Accessible-Readily PTS: 1 REF: NAT: Obj 419.2 ABank 42. ANS: D 2011 NEC: 300.3(B)
PTS: 1 REF: 2011 NEC: 300.3(B) NAT: Obj 420.1 ABank 43. ANS: A 2011 NEC: 300.4(C) PTS: 1 REF: 2011 NEC: 300.4(C) OBJ: Obj 421.1 Worksheet NAT: Obj 421.1 ABank 44. ANS: B 2011 NEC: 110.9 PTS: 1 REF: 2011 NEC: 110.9 OBJ: 422 NEC Worksheet 45. ANS: C 2011 NEC: 314.25(A) PTS: 1 REF: 2011 NEC: 314.25(A) NAT: Obj 419.3 ABank 46. ANS: D 2011 NEC: 300.5(C) PTS: 1 REF: 2011 NEC: 300.5(C) OBJ: Obj 420.2 Worksheet NAT: Obj 420.2 ABank 47. ANS: C Defn: Remote-Control Circuit PTS: 1 REF: OBJ: Obj 419.2 Worksheet NAT: Obj 419.2 ABank 48. ANS: D 2011 NEC: 427.36 PTS: 1 REF: 2011 NEC: 427.36 OBJ: Obj 429 NEC Worksheet NAT: 429 NEC ABank 49. ANS: C 2011 NEC: T. 314.16(A) PTS: 1 REF: 2011 NEC: T. 314.16(A) NAT: Obj 419.4 ABank TOP: Box Fill 50. ANS: A Defn: Accessible (as applied to equipment) PTS: 1 REF: NAT: Obj 419.2 ABank 51. ANS: A 2011 NEC: 90.4 PTS: 1 REF: 2011 NEC: 90.4 NAT: Obj 419.1 ABank 52. ANS: B 2011 NEC: 324.10(B)(1) PTS: 1 REF: 2011 NEC: 324.10(B)(1) OBJ: Obj 420.4 Worksheet NAT: Obj 420.4 ABank