Journeyman's Practice Exam

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1 Journeyman's Practice Exam [Time limit 4.0 hrs.] (The test is open book. I've started at the front of the Code Book and worked toward the back for instructional purposes. The real test will not be in order believe me!) 1. True or False: The code was intended to be used as an instructional manual. (a) T (b) F 2. True or False: The Code cover all electrical installations in the United States and it's territories. (a) True (b) False 3. True or False: Mandatory Rules are noted by the word shall. (a) True (b) False 4. If you have to use a ladder to reach an on/off switch for a piece of outdoor equipment you would classify that switch as being: (a) accessible (b) code violation (c) readily accessible (d) approved

2 5. The ratio of the maximum demand of a system, part of a system, to the total connected load of a system or part of the system under consideration is: (a) Demand Factor (b) Inverse Square Law (c) Industry Standard (d) Maxwell's Ratio 6. A motor starter is considered if it can be seen within 50 feet of the motor it controls. (a) Code Violation (b) In Sight From (c) Number 1 (d) Non-accessible 7. Termination provisions of equipment for circuits rated over 100 amperes, or marked for conductors larger than 1 AWG, shall be used only for : (a) copper wire (b) aluminum wire (c) 60 0 C (d) 75 0 C

3 8. On a 4-wire Delta-connected system where the midpoint of one phase winding is grounded shall be permanently marked what color? (a) any color other than green (b) purple (c) white (d) orange 9. Where working on a 120 volt system exposed to live parts on one side of a working space and no live or grounded parts on the other side of the working space you must have a minimum clearance of: (a) 3 ft (b) 3.5 ft (c) 4 ft (d) 4.5 ft 10. The minimum headroom of working spaces around service equipment, switchboards, panel boards, or motor control centers is: (a) 8ft (b) 6ft (c) 6.5ft (d) 4ft

4 11. An insulated grounded conductor larger than size 6 AWG shall be identified by which of the following: I-by a continuous white or gray finish; II-by three continuous white stripes along its entire length on other than green insulation; III-A distinctive white or gray marking at its terminals. (a) I-II (b) I (c) I-II-III (d) II-III 12. The rating of a branch circuit shall be determined by: (a) overcurrent device (b) the architect (c) the conductor size (d) the receptacle rating 13. True or False: Where two or more circuits supply power to equipment on the same yoke a means to simultaneously disconnect all the ungrounded conductors shall be installed in the panel board where the circuits originate. (a) T (b) F

5 14. Which of these room require at least one 20 Amp circuit in a dwelling? (a) bathroom (b) kitchen (c) laundry (d) all the above 15. Which of the following is not a true statement: I- I can load a 15A receptacle to 20A II- A 40A Heavy Duty lamp holder may be connected to 50A receptacle. (a) I only (b) II only (c) I or II (d) neither I or II 16. At least one receptacle must be mounted to peninsular counter space if its long dimension is or over and its short dimension is or over. (a) 10", 20" (b) 12", 24" (c) 24", 12" (d) 18", 14"

6 17. In dwelling units hallways of or more shall have at least one receptacle outlet installed. (a) 10ft (b) 12ft (c) 8ft (d) 6ft 18. The ampacity of a feeder shall not be less than that of the service conductors where the feeders carry the total load supplied by service conductors with an ampacity of amperes or less. (a) 100 (b) 50 (c) 55 (d) The first step in calculating a hospital s general lighting load would be to multiply the hospital's square foot area by VA. (a) 3 VA (b) 1/2 VA (c) 2 VA (d) 3 1/2 VA

7 Household dryers in an apartment building would have a demand factor of. (a) 100% (b) 80% (c) 50% (d) 65% 21. One 12KW range in a dwelling would have a demand of on the service? (a) 12KW (b) 9.6KW (c) 8KW (d) none of the above 22. Overhead conductors for festoon lighting shall not be smaller than AWG without a messenger wire. (a) 6 (b) 1/0 (c) 8 (d) 12

8 23. Overhead conductors over residential property and driveways, and whose commercial areas not subject to truck traffic, where the voltage does not exceed 300 volts to ground shall have a clearance of not less than ft. (a) 10 ft (b) 12 ft (c) 14 ft (d) 16 ft 24. The maximum number of disconnects for each supply of a large apartment complex shall be not more than. (a) 1 (b) 2 (c) 4 (d) For installations that supply not more than 2 two-wire branch circuits, the feeder or branch circuit disconnecting means shall have a rating of not less than. (a) 15 A (b) 20 A (c) 30 A (d) 60 A

9 26. Service conductors are considered outside the building when installed beneath of concrete. (a) 2 in (b) 4 in (c) 6 in (d) 12 in 27. Service lateral conductors must not be smaller than copper or aluminum. (a) #8, #6 (b) #6, #4 (c) #12, #10 (d) #3, #2/0 28. Service disconnecting means shall not be installed in: (a) bedrooms (b) laundry rooms (c) bathrooms (d) basements 29. Which one of these statements is not true concerning services: (a) For a one family dwelling the service disconnects shall not be less than 100 amperes. (b) Each ungrounded service conductor shall have overcurrent protection (c) The service overcurrent device shall be integral to the service disconnecting means (d) The maximum setting for ground fault protection shall be 1200 Amperes

10 30. True or False: Class H cartridge fuses of the renewable type shall only be used for replacement in existing installations where there is no evidence of tampering or over-fusing. (a) T (b) F 31. Grounding of non-current-carrying conductive materials enclosing electrical conductors or equipment shall be connected together to form a(n): (a) Electrical System Ground (b) Bonding Strap (c) Effective Ground-Fault Current Path (d) Ground Fault 32. An unintentional electrically conducting connection between an ungrounded conductor of an electrical circuit with its non-current-carrying metal parts is called: (a) short circuit (b) ground (c) ground-fault (d) arc flash 33. Alternating current systems of less than 50 volts shall be grounded under the following condition(s): (a) Where supplied by transformers exceeding 150volts to ground (b) Where supplied by a transformer whose supply system is ungrounded (c) Where installed as overhead conductors outside of buildings. (d) Either a, b, or c (e) None of the above

11 34. When paralleling service entrance conductors the accompanying equipment ground conductor shall not be smaller than : (a) #6 AWG (b) #1 AWG (c) #1/0 AWG (d) #2/0 35. Main Bonding Jumpers shall not be smaller than Table values and where larger than 1100kcmils copper or 1750kcmils aluminum, the bonding jumper shall have an area not less than : (a) 12 1/2% of the area of the largest phase conductor (b) 14 % of the largest aluminum conductor (c) 125% of the grounded conductor (d) equal to the largest phase conductor 36. The Equipment Grounding Conductor (EGC) shall be sized by: (a) Table (b) Table (c) Engineering formulas (d) Your Foreman

12 37. When using an underground metal water pipe for the Grounding Electrode Conductor it must be in contact with the earth for a distance of at least. (a) 8 ft (b) 10 ft (c) 12 ft (d) 25 ft 38. An electrode encased by at least 2" of concrete located within the footing that is in direct contact with the earth must be connected to the galvanized re-bar by a conductor not less than. (a) #4 AWG Bare copper (b) #6 AWG Stranded Aluminum (c) #8 AWG Bare Copper (d) #4 AWG Stranded Aluminum 39. A supplemental electrode bonding conductor need not be larger than: (a) #4 AWG copper (b) #6 AWG aluminum (c) #6 AWG copper (d) #2 AWG aluminum

13 40. A single electrode consisting of a pipe, rod, or plate that does not have a resistance to of ohms or less shall be augmented by one additional electrode. (a) 10 (b) 25 (c) 48 (d) What is the minimum size of the Grounding Electrode Conductor for an Alternating Current system that has service entrance conductors of 300kcmil? (a) #6 AWG aluminum (b) #8 AWG copper (c) #2 aluminum (d) #2 copper 42. Electrodes of pipe or conduit shall not be less than trade size? (a) 1/2" (b) 3/4" (c) 1" (d) 3/8" 43. The minimum size Equipment Grounding Conductor for a 100 A service is? (a) #8 copper (b) #8 aluminum (c) #6 copper (d) #4 aluminum

14 44. In both exposed and concealed locations where a cable or raceway is installed through bored holes in joists, rafters, or wood members, the holes shall be bored so that the edge of the hole is not less than inches from the nearest edge of the wood member? (a) 1/2 (b) 1 (c) 1 1/4 (d) 1 ½ 45. Where raceways containing ungrounded conductors of #4 AWG or larger enter a cabinet, box enclosure, or a raceway, the conductors shall be protected by a fitting with. (a) an insulated throat (b) marked volume (c) a steel lock ring (d) wire ties 46. What is the minimum burial depth for a 20A GFCI protected circuit underneath a residential driveway using PVC? (a) 18" (b) 12" (c) 24" (d) 6"

15 47. Direct buried conductors and enclosures emerging from grade shall be protected by enclosures or raceways extending from below grade to above grade. (a) 18", 8" (b) 12", 8' (c) 18", 8' (d) 24", 10' 48. True or False: If the splices are listed for the purpose it is allowable by the code to splice direct burial conductors? (a) T (b) F 49. What is the minimum number of supports required for a 100 ft vertical run of 3/0 AWG copper conductors? (a) 10 (b) 8 (c) 4 (d) Which wiring method is not allowed inside a duct or plenum used for environmental air? (a) Type MI Cable (b) EMT (c) 5 ft of Flexible Metal Conduit (d) Rigid Metal Conduit

16 51. Paralleled conductors shall comply with which of the following condition(s)? (a) Be the same length (b) Same conductor material (c) Same circular mil area (d) Have the same insulation (e) Terminated in the same manner (f) a, b, and c only (g) a, b, c, d, and e 52. By what percentage must the Table ampacity of 5 current-carrying conductors in the same raceway be derated? (a) 45% (b) 50% (c) 70% (d) 80% 53. What is the minimum size service entrance conductor for a single phase 120/240V 3-wire hook-up for a 150 amp service? (a) 1/0 AWG (b) 1 AWG (c) 2 AWG (d) 4 AWG

17 54. What is the ampacity of a #6AWG copper conductor at an ambient temperature of 86 o F in a system that uses 60 o C terminations? (a) 40 A (b) 55 A (c) 45.4 A (d) 70 A 55. What is the allowable ampacity of three 350kcmil aluminum conductors in the same raceway in an ambient temperature of 30 o C? (a) 260 A (b) 310 A (c) 210 A (d) 250 A 56. By what factor would you multiply the Table ampacity of a #6 copper conductor installed in an ambient temperature of 131 o F? (a).76 (b).67 (c).41 (d).71

18 57. What is the minimum wire-bending space required for three 1/0 conductors at one terminal? (a) 3" (b) 5.5" (c) 7" (d) 6 1/2" 58. True or False: Nonmetallic boxes shall be permitted only with open wiring on insulators, concealed knob and tube wiring, cabled wiring methods with entirely nonmetallic sheaths, flexible cords, and nonmetallic raceways. (a) T (b) F 59. When figuring boxfill, the volume of each #10 AWG copper conductor entering the junction box shall be calculated at in 3? (a) 1.75 (b) 2.50 (c) 2.00 (d) What is the minimum size junction box permitted for a calculated wire volume of 29.5 in 3? (a) 4 x 1 ¼ square box (b) 4 11/16 x 1 ½ square box (c) 4 x 1 ½ square box (d) 4 11/16 x 2 1/8 square box

19 61. Boxes in walls or ceilings of non-combustible material, employing a flush-type cover or faceplate shall not be set back of the finished surface more than: (a) 1/8" (b) 1/4" (c) 3/16" (d) 5/16" 62. Raceway supported enclosures with devices, luminaires, or lamp holders shall not have a volume greater than in 3. (a) 60 (b) 80 (c) 100 (d) Boxes for ceiling suspended paddle fans shall be listed for the purpose and shall not support ceiling fans that weight more than lbs. (a) 70 (b) 35 (c) 80 (d) 65

20 64. For straight pulls the length of a junction box over 600Volts shall not be less than times the outside diameter of the largest lead-covered conductor entering the box and times the outside diameter of the largest unshielded conductor or cable. (a) 24, 34 (b) 32, 48 (c) 34, 24 (d) 48, Type MC cable shall not be used where exposed to the following condition(s): (a) Direct burial (b) In concrete (c) both a and b (d) a only (e) b only 66. Exposed vertical risers of IMC conduit supplying industrial machinery shall be supported not less than every ft. (a) 4 (b) 10 (c) 15 (d) 20

21 67. What is the minimum bending radius of a 1.5" nonmetallic underground conduit with conductors? (a) 20" (b) 18" (c) 16" (d) 12" 68. SJO cable has insulation. (a) Thermoplastic (b) Thermoset (c) Cotton (d) Rubber 69. Storage type water heaters that have a capacity of 120 gal. or less shall be considered: (a) a Code violation (b) non-continuous load (c) continuous load (d) average load 70. A motor with a locked rotor current of 10 A would have the code letter on its nameplate. (a) A (b) E (c) H (d) M

22 71. Conductors supplying several motors and/or other loads shall have an ampacity of not less than % of the full load current rating of the rated motor of the group plus the sum of all the other loads. (a) 100, lowest (b) 115, highest (c) 125, lowest (d) 125, highest 72. A 1.5HP continuous duty motor has a nameplate full load current rating of 20A. What is the maximum trip setting allowed for a separate overload device controlling this motor? (a) 20A (b) 23A (c) 25A (d) 30A 73. True or False: You must never install a motor overload device to trip a grounded conductor. (a) T (b) F 74. What is the Full Load Current of a 480Volt 3-phase 10HP AC motor? (a) 14A (b) 12A (c) 16A (d) 18A

23 75. Which of the following are you allowed to utilize an attachment plug as the disconnecting means? I- room air conditioner II-household refrigerator III-beverage dispenser IV-drinking water cooler. (a) II, IV (b) I, II, III (c) I, II, III, IV (d) II, III, IV 76. The total marked rating of a cord-and-plug connected room air conditioner shall not exceed % of the branch circuit rating. (a) 80 (b) 60 (c) 50 (d) Individual Dry-Type transformers of more than 112.5KVA rating shall be installed in a(n) room. (a) 10' x 15' (b) outdoor (c) fire resistant (d) basement

24 78. The walls and floors of transformer vaults shall have a minimum fire resistance rating of hours. (a) 4 (b) 3 (c) 2 (d) An area that dispenses gasoline, within 5ft of the pump, would be classified as a Class Division hazardous area. (a) I, 1 (b) I, 2 (c) II, 2 (d) III, A Class II, Division 1 location is one in which is (are) in the air under normal operating conditions in quantities sufficient to produce and explosion. (a) gases (b) dust (c) fibers (d) asbestos

25 81. Equipment must be marked to show the environment for which it has been evaluated. A temperature marking of T4 would signify a temperature of o F? (a) 536 (b) 392 (c) 185 (d) In healthcare facilities both the Alternate source and the normal source of power shall be connected to the Equipment System, Life Safety Branch, and Critical Branch by? (a) Direct Connection (b) Transfer Switch Arrangement (c) Parallel Conductors (D) Series Conductors 83. Individual branch circuits shall not be required for portable medical X-ray equipment requiring a capacity of not over A? (a) 20 (b) 30 (c) 40 (d) 60

26 84. Fixed Stage Equipment such as footlights, border lights, and sidelights shall be arranged so that no branch circuit supplying such equipment carries a load in excess of A? (a) 10 (b) 12 (c) 16 (d) Where GFCI protection is required in supplying carnival concession stand, the GFCI cam be a part of the cord provided it is within of the attachment plug? (a) sight from (b) 12 inches (c) 36 inches (d) 6 ft 86. Which of these locations concerning Mobile Homes does not require GFCI receptacle(s)? (a) within 25 ft of outside A/C unit (b) in the bathroom (c) within 8 ft of a wet bar (d) kitchen countertop

27 87. All metal parts inside and outside of a mobile home must be connected to a ground bus within the distribution panel; and in turn connected to the service panel by an insulated green conductor. Neither the frame of the mobile home or any appliance ground connected within shall be connected to the? (a) ungrounded conductor (b) grounded conductor (c) equipment ground (d) meter socket 88. The demand factor for the main service in a mobile home park housing 60 mobile homes shall be reduced to of its total calculated load? (a) 100% (b) 39% (c) 23% (d) 50% 89. The Electrical Datum Plane at a Marina or boatyard is said to be a horizontal plane ft above the highest water level under normal circumstances including tides. (a) 2 (b) 4 (c) 6 (d) 8

28 90. Each commercial building and each commercial occupancy, accessible to pedestrian traffic shall be provided with at least one amp outlet at each entrance for sign or outline lighting. (a) 10 (b) 15 (c) 20 (d) Traveling cables of elevators shall be permitted to be in lengths not over ft when looping cables around supports for strain relief. (a) 25 (b) 50 (c) 75 (d) Conductors that supply one or more Arc Welders shall be protected by an overcurrent device rated or set at not more than % of the conductor ampacity. (a) 80 (b) 100 (c) 125 (d) 200

29 93. Overhead service entrance cables routed directly over an outside swimming pool shall be at least ft over the surface of the water. (a) 15 (b) 18 (c) 25 (d) The minimum burial depth for rigid conduit to supply an in-ground swimming pool is? (a) 6" (b) 18" (c) 24" (d) 12" 95. All 15 and 20-ampere single phase 125 Volt receptacles located within ft of the inside wall of pools and shall be GFCI protected. (a) 5 (b) 12 (c) 20 (d) 25

30 96. All forming shells for wet niche underwater luminaires shall include provisions for grounding with a AWG copper conductor. (a) #4 (b) #6 (c) #8 (d) # In the event of failure of the normal supply to, or within the building or group of buildings that require emergency power, emergency lighting, emergency power or both shall be available within a time not to exceed. (a) 10 seconds (b) 15 seconds (c) 30 seconds (d) 45 seconds 98. Which of the following supply conductors are not allowed in a raceway that encloses emergency circuits? (a) exit light (b) egress illumination (c) security alarm (d) fire alarm

31 99. Communications wires and cables shall have a vertical clearance of not less than ft over roof tops. (a) 3 (b) 4 (c) 8 (d) Type communications cable shall be permitted for one and two family dwellings. (a) CMX (b) CMR (c) CMUC (d) CMG feet of Amateur Radio Station outdoor antenna conductors shall be of hard drawn copper not less than AWG. (a) 14 (b) 12 (c) 6 (d) 10

32 102. What percentage of cross sectional area of a ¾ rigid conduit, 30 ft. long, shall be permitted to contain current-carrying conductors? (a) 20% (b) 40% (c) 60% (d) 80% 103. What percentage of cross section of conduit shall be occupied by current-carrying conductors in a 3/4" EMT conduit 24" long? (a) 20 (b) 40 (c) 60 (d) If the total calculated cross sectional area of conductors was 3.500in 2 what is the minimum size conduit required for a forty foot run of EMT? (a) 2" (b) 3" (c) 4" (d) 5"

33 105. What is the maximum number of #12THW conductors allowed to be installed inside a 1.5" Rigid Metal conduit? (a) 39 (b) 32 (c) 25 (d) 15

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