Download PrepIQ 703 Kentucky Standard Journeyman Electrician Ultimate Exam and more Exams Technology in PDF only on Docsity!
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Question 1. Which of the following is the minimum size for a grounding electrode conductor (GEC) that connects a 100-amp residential service to a concrete-encased electrode in Kentucky? A) 6 AWG copper B) 8 AWG copper C) 4 AWG aluminum D) 6 AWG aluminum Answer: B Explanation: NEC 250.66 permits a minimum 8 AWG copper GEC for a 100-amp service when connected to a concrete-encased electrode (Ufer). Question 2. Under the Kentucky Electrical Licensing Law, a journeyman electrician may supervise an apprentice on a project that involves which of the following maximum voltage levels? A) 120 V AC only B) 240 V AC only C) 600 V AC or DC D) 1000 V AC only Answer: C Explanation: Kentucky journeyman licensure permits supervision of work up to 600 V AC or DC, matching the state’s adoption of the NEC voltage limits. Question 3. When installing a 3-wire NM cable in a residential branch circuit, which conductor must be continuous from the panel to the device without splicing? A) Black (hot) B) White (neutral) C) Bare or green (ground) D) All of the above Answer: D Explanation: NEC 300.3(B) requires that all conductors of a circuit, including hot, neutral, and equipment grounding, be run together without splices unless a listed splice device is used.
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Question 4. A grounded (neutral) conductor is required to be insulated in a commercial building. What is the minimum color identification for this conductor? A) White or gray B) Green C) Red D) Any color except green or bare Answer: A Explanation: NEC 200.6 specifies that grounded conductors must be identified by white or gray insulation, or by a continuous white or gray marking. Question 5. Which of the following devices is required to be installed on a 20 - amp, 120-V branch circuit that supplies a bathroom receptacle in a Kentucky dwelling? A) Two-pole circuit breaker B) GFCI protection C) AFCI protection D) Surge protective device (SPD) Answer: B Explanation: NEC 210.8(A)(1) mandates GFCI protection for all bathroom receptacles in dwelling units. Question 6. The Kentucky amendment to the NEC requires that all receptacles installed in a garage be protected by which of the following? A) AFCI only B) GFCI only C) Both AFCI and GFCI D) Neither AFCI nor GFCI if the circuit is 15 A Answer: C Explanation: Kentucky adopts NEC 210.12(A) for AFCI protection in garages and NEC 210.8(A)(2) for GFCI, thus both protections are required. Question 7. In Kentucky, the maximum allowable voltage drop for a feeder supplying a 120-V, 20-A lighting load over a distance of 100 ft should not exceed:
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A) Table 310.15(B)(1) B) Table 310. C) Table 310. D) Table 310.15(B)(2)(a) Answer: D Explanation: Table 310.15(B)(2)(a) provides temperature correction factors for conductors based on ambient temperature and insulation rating. Question 11. Which type of conduit is permitted for underground installations in Kentucky where soil corrosivity is high? A) Rigid Metal Conduit (RMC) only B) PVC Schedule 40 only C) EMT with corrosion-resistant coating D) BOTH RMC and PVC Schedule 40 Answer: D Explanation: Both RMC and PVC Schedule 40 are listed for direct burial; PVC is often preferred for its corrosion resistance. Question 12. When connecting a grounding electrode conductor to a metal water pipe, the connection must be made within how many inches of the point where the pipe enters the building? A) 12 in. B) 18 in. C) 24 in. D) 36 in. Answer: C Explanation: NEC 250.52(A)(1) requires the GEC to be bonded to the metal water pipe within 5 ft (60 in.) of entry; Kentucky adopts a more restrictive 24 in. for added safety. Question 13. Which of the following is the correct method for identifying a 240 - V, 3-phase, 4-wire feeder in a commercial building? A) Red, black, white, and green conductors.
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B) Three phase conductors of any color, plus a bare ground. C) L1-L3 identified by any colors, neutral white, ground green or bare. D) No identification required for the neutral. Answer: C Explanation: NEC 200.6 requires the neutral to be white or gray; phase conductors may be any color, and the equipment grounding conductor must be green or bare. Question 14. In Kentucky, a receptacle installed in a wet location (e.g., outdoors) must have which of the following ratings? A) 15-amp, 125-V only B) 20-amp, 250-V only C) 15-amp, 250-V only D) Either 15-amp or 20-amp, 125-V, and be listed for wet locations Answer: D Explanation: NEC 406.8(A) requires receptacles in wet locations to be listed for such use; voltage and ampere ratings must match the circuit. Question 15. Which of the following is the minimum size for a copper grounding electrode conductor connected to a 400-amp service? A. 2 AWG B. 4 AWG C. 6 AWG D. 8 AWG Answer: A Explanation: NEC 250.66 indicates a minimum of 2 AWG copper for a 400-amp service grounding electrode conductor. Question 16. A Kentucky journeyman is installing a lighting circuit that feeds a single-pole switch controlling a recessed light. Which of the following wiring methods is acceptable? A) Run a 12-AWG NM cable from panel to switch, then a separate 12-AWG NM from switch to light.
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A) 430.
B) 210.
C) 240.
D) 310.
Answer: A Explanation: NEC 430.52 provides the rules for sizing overcurrent protective devices for motors, including the 125 % rule for non-continuous loads. Question 20. A Kentucky journeyman must determine the conduit fill for three 4-AWG THHN conductors in a 3/4-in. EMT. According to NEC Table 1, what is the maximum allowable fill percentage? A) 20 % B) 31 % C) 40 % D) 53 % Answer: B Explanation: NEC Table C.1 (Chapter 9) specifies a maximum of 31 % conduit fill for three or more conductors. Question 21. Which type of circuit breaker is required for a 120/240-V, 30-A dryer circuit in a Kentucky residential dwelling? A) Single-pole 30-A breaker B) Two-pole 30-A breaker C) Two-pole 40-A breaker with a 30-A fuse D) Two-pole 20-A breaker Answer: B Explanation: A dryer requires a 240-V, 30-A two-pole breaker per NEC 210.11(C) (2). Question 22. In Kentucky, the minimum height for a receptacle installed in a bathroom vanity area is: A) 12 in. above the floor
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B) 15 in. above the floor C) 18 in. above the floor D) 24 in. above the floor Answer: C Explanation: NEC 210.52(D) requires bathroom receptacles to be installed no higher than 48 in. above the floor; the typical installation is at 18 in. Question 23. A Kentucky journeyman is required to install an AFCI device on a bedroom circuit. Which NEC article governs the location of the AFCI? A) 210.12(A) B) 210.8(A) C) 300.4(D) D) 430. Answer: A Explanation: NEC 210.12(A) requires AFCI protection for all 120-V, single-phase, 15 - and 20-A branch circuits supplying bedroom outlets. Question 24. When using a flexible metal conduit (FMC) for a branch circuit, the maximum allowable bend radius is: A) 4 times the conduit’s outer diameter B) 6 times the conduit’s outer diameter C) 8 times the conduit’s outer diameter D) No limit, as long as the conduit is not crushed Answer: B Explanation: NEC 376.12(A) specifies a minimum bend radius of 6 times the conduit’s outside diameter for FMC. Question 25. Which of the following is the correct designation for a 3-wire, 120/240-V service entrance cable used in a single-family home? A) SEU B) SER C) USE
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Explanation: Using NEC Chapter 9 Table C.1, 4/0 AWG aluminum THHN has an area of 0.268 in². Four conductors total 1.072 in²; 1-½ in. EMT (area 2.036 in²) allows 53 % fill, meeting the requirement. Question 29. Which of the following is the correct method for grounding a metal conduit system that serves as the equipment grounding conductor? A) No additional grounding needed. B) Install a separate grounding electrode conductor. C) Bond each conduit run at every junction box. D) Use a grounding clamp at the first outlet box only. Answer: C Explanation: NEC 250.118 requires bonding of metal conduit at each accessible junction, box, or enclosure to maintain a continuous grounding path. Question 30. In Kentucky, the minimum allowable conductor size for a 120-V, 20 - A receptacle circuit is: A) 14 AWG copper B) 12 AWG copper C) 10 AWG copper D) 8 AWG copper Answer: B Explanation: NEC 210.19(A)(1) requires a minimum of 12 AWG copper for a 20-A circuit. Question 31. A Kentucky journeyman is installing a dedicated circuit for a 1500 - W electric water heater on a 240-V supply. What is the minimum circuit breaker size? A) 10 A B) 15 A C) 20 A D) 25 A Answer: C
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Explanation: The heater draws 6.25 A (1500 W ÷ 240 V). NEC 210.20(A) requires the breaker to be at least 125 % of the continuous load, so 6.25 A × 125 % = 7.8 A; the next standard size is 15 A, but for water heaters a 20-A breaker is typically used to accommodate start-up currents. Question 32. Which NEC article defines the requirements for luminaires installed in damp or wet locations within Kentucky? A) 410. B) 410. C) 410. D) 410. Answer: B Explanation: NEC 410.24 covers damp and wet locations for luminaires, specifying enclosure ratings. Question 33. When installing a receptacle in a kitchen countertop area, the countertop must have a minimum clearance of how many inches from the edge of the receptacle to the edge of the countertop? A) 1 in. B) 3 in. C) 6 in. D) 12 in. Answer: B Explanation: NEC 210.52(C)(1) requires a minimum 3-in. space between the receptacle and the countertop edge for safety. Question 34. In Kentucky, the permissible voltage for a Class 2 power-limited circuit is limited to: A) 30 V AC or DC B) 60 V DC only C) 100 V AC only D) 150 V AC or DC Answer: A
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Question 38. When installing a 120-V, 20-A receptacle circuit in a garage, what type of breaker protection is mandated by Kentucky code? A) AFCI only B) GFCI only C) Both AFCI and GFCI D) Neither, as long as the circuit is 15 A or less Answer: C Explanation: Kentucky adopts NEC 210.12(A) (AFCI) and 210.8(A)(2) (GFCI) for garage receptacles. Question 39. The minimum distance a receptacle must be placed from a bathtub rim in a residential bathroom in Kentucky is: A) 12 in. B) 18 in. C) 21 in. D) 24 in. Answer: C Explanation: NEC 210.8(A)(10) sets a minimum of 21 in. horizontal clearance from the bathtub rim. Question 40. Which NEC article governs the installation of wiring methods for fire alarm circuits in Kentucky? A) 760. B) 725. C) 300. D) 210. Answer: A Explanation: NEC Chapter 7, Article 760, specifically addresses fire alarm system wiring.
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Question 41. A Kentucky journeyman is installing a 30-A, 240-V dryer circuit using NM cable. What is the minimum number of conductors required in the cable? A) Two (hot and neutral) B) Two (hot and ground) C) Three (two hots and ground) D) Four (two hots, neutral, ground) Answer: C Explanation: A 240-V dryer circuit requires two hot conductors and an equipment grounding conductor; a neutral is not required unless the dryer has a 120-V component, which is not indicated. Question 42. Which of the following devices is required to be installed on a 15 - A, 120-V branch circuit that supplies a countertop electric range in a Kentucky kitchen? A) AFCI only B) GFCI only C) Both AFCI and GFCI D) No special protection required Answer: B Explanation: NEC 210.8(A)(6) requires GFCI protection for countertop receptacles, which includes those for electric ranges in kitchens. Question 43. The maximum allowed number of receptacles on a single 20-A branch circuit in a Kentucky dwelling unit is: A) 8 B) 10 C) 12 D) No specific limit, as long as the load calculation does not exceed 80 % of the circuit rating. Answer: D Explanation: NEC does not set a specific receptacle count; the total load must not exceed 80 % of the circuit's ampacity for continuous loads.
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A) No protection needed. B) Install a steel plate under the tile. C) Use a conduit or a protective sleeve. D) Replace the conductor with NM cable. Answer: C Explanation: NEC 300.4(A) requires protection for conductors passing through metal ceiling tiles, typically via conduit or a protective sleeve. Question 48. A Kentucky journeyman must install a receptacle in a laundry room. Which of the following is required by code? A) GFCI protection only B) AFCI protection only C) Both GFCI and AFCI D) No special protection required Answer: A Explanation: NEC 210.8(A)(11) requires GFCI protection for laundry room receptacles; AFCI is not required. Question 49. Which NEC article specifies the allowable use of flexible metal conduit (FMC) for short runs in a residential attic? A) 334. B) 376. C) 300. D) 358. Answer: B Explanation: NEC 376.12 governs the installation of FMC, including allowable lengths and locations such as attic spaces. Question 50. When sizing a feeder for a 3-phase, 150-A motor, the NEC requires the feeder conductors to be sized based on what percentage of the motor’s full-load current? A) 100 % B) 125 %
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C) 150 %
D) 200 %
Answer: B Explanation: NEC 430.22 requires feeder conductors for motors to be sized at 125 % of the motor’s full-load current. Question 51. In Kentucky, a receptacle installed within 6 ft of a bathtub must have which of the following protection? A) GFCI only B) AFCI only C) Both GFCI and AFCI D) No protection required if the receptacle is a dedicated circuit. Answer: A Explanation: NEC 210.8(A)(10) mandates GFCI protection for receptacles within 6 ft of a bathtub. Question 52. Which of the following is the correct minimum size of a copper grounding electrode conductor for a 600-amp service? A) 4 AWG B) 2 AWG C) 1/0 AWG D) 3/0 AWG Answer: C Explanation: NEC 250.66 specifies 1/0 AWG copper as the minimum for a 600 - amp service grounding electrode conductor. Question 53. A Kentucky journeyman is installing a receptacle in a walk-in pantry. The NEC requires the receptacle to be located at a maximum distance of how many inches from the countertop edge? A) 12 in. B) 18 in. C) 24 in.
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Answer: A Explanation: NEC 250.104(A)(1) requires a listed grounding clamp within 5 ft of the pipe’s entry to the building. Question 57. A Kentucky journeyman must determine the minimum conduit size for a 100-amp feeder using three 1/0 AWG aluminum conductors and a 4 AWG copper grounding conductor. Which conduit size is the smallest that meets the 40 % fill limit for three or more conductors? A) 1 in. EMT B) 1 ¼ in. EMT C) 1 ½ in. EMT D) 2 in. EMT Answer: C Explanation: The total cross-sectional area of three 1/0 AWG Al (0.232 in² each) plus 4 AWG Cu (0.053 in²) is 0.749 in². 1-½ in. EMT has an internal area of 2.036 in²; 40 % of that is 0.814 in², which accommodates the conductors. Question 58. Which NEC article specifies the requirements for installing receptacles in a dwelling unit’s hallway? A) 210.52(D) B) 210.70(A) C) 210.52(B) D) 210.8(A)(3) Answer: C Explanation: NEC 210.52(B) outlines receptacle placement in hallways, ensuring a receptacle is installed within 6 ft of any point along the hallway. Question 59. In Kentucky, the minimum height for a receptacle installed in a garage used for vehicle charging is: A) 12 in. above the floor B) 15 in. above the floor C) 18 in. above the floor D) No specific height, as long as it is accessible.
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Answer: D Explanation: NEC does not prescribe a specific height for garage receptacles; they must be readily accessible. Question 60. Which of the following is the correct labeling requirement for a 240 - V, 30-A circuit that supplies a built-in electric range in a Kentucky home? A) “Range – 30 A” on the panel schedule only. B) “120 V” on the receptacle. C) “240 V, 30 A” on the circuit breaker and panel schedule. D) No labeling required if the circuit is dedicated. Answer: C Explanation: NEC 210.3(A) requires circuits to be marked with their voltage and ampere rating on the breaker and panel schedule. Question 61. When installing a dedicated 15-A, 120-V circuit for a countertop microwave in a Kentucky kitchen, what type of GFCI protection is required? A) No GFCI required. B) GFCI protection at the receptacle only. C) GFCI protection at the breaker only. D) GFCI protection either at the breaker or receptacle. Answer: D Explanation: NEC 210.8(A)(6) requires GFCI protection for countertop receptacles; it can be provided at the breaker or receptacle. Question 62. The maximum number of conductors allowed in a single 1/2-in. EMT conduit for a residential branch circuit is: A) 2 B) 3 C) 4 D) 5 Answer: C
