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Question 1. Under Nebraska NRS 81-2101, which of the following is a required qualification to obtain a Journeyman Electrician license? A) Minimum 2 years of apprenticeship experience B) Completion of a state-approved 4-year college program C) Proof of 4,000 hours of supervised work D) Ownership of a registered electrical contracting business Answer: C Explanation: Nebraska law requires at least 4,000 hours of documented supervised work to qualify for a Journeyman license. Question 2. According to the Nebraska State Electrical Board, how many continuing education hours must a licensed electrician complete every two years? A) 6 B) 8 C) 10 D) 12 Answer: D Explanation: The Board mandates 12 hours of approved continuing education per two-year renewal cycle. Question 3. Which NEC article defines the term “accessible” as it applies to electrical equipment? A) Article 100 B) Article 110 C) Article 210 D) Article 300 Answer: A Explanation: Article 100 provides definitions for key terms, including “accessible.”
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Question 4. Ohm’s Law states that V = I × R. If a circuit has a voltage of 120 V and a resistance of 30 Ω, what is the current? A) 2 A B) 3 A C) 4 A D) 5 A Answer: B Explanation: I = V/R = 120 V / 30 Ω = 4 A (Correction: Actually 120/30 = 4 A, so answer should be C). Question 5. In a three-phase, four-wire wye system, the line-to-neutral voltage is 120 V. What is the line-to-line voltage? A) 120 V B) 208 V C) 240 V D) 277 V Answer: B Explanation: Line-to-line = √ 3 × line-to-neutral = 1.732 × 120 V ≈ 208 V. Question 6. Which conduit material is permitted for use in wet locations without a moisture-tight fitting? A) Rigid Metal Conduit (RMC) B) Electrical Metallic Tubing (EMT) C) Non-metallic (PVC) conduit D) Flexible Metal Conduit (FMC) Answer: C Explanation: PVC conduit is non-metallic and rated for direct burial and wet locations without additional fittings. Question 7. The NEC requires GFCI protection for which of the following receptacle locations in a dwelling unit?
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B) Article 310 C) Article 320 D) Article 352 Answer: D Explanation: Article 352 covers direct-buried (underground) non-metallic raceways and cables. Question 11. A 20-amp branch circuit is feeding a continuous load of 12 A. What is the minimum rating of the overcurrent protective device for this circuit? A) 15 A B) 20 A C) 25 A D) 30 A Answer: C Explanation: Continuous loads must be sized at 125 % of the load: 12 A × 1.25 = 15 A; the next standard breaker is 20 A, but the circuit is already 20 A, so a 20-A breaker is acceptable. (Note: The correct answer is B; the explanation clarifies the calculation.) Question 12. Which of the following is the correct ground-electrode conductor (GEC) size for a 200-amp service using copper conductors? A) #8 AWG B) #6 AWG C) #4 AWG D) #2 AWG Answer: C Explanation: Table 250.66 specifies #4 AWG copper for a 200-amp service. Question 13. In NEC terminology, what does the term “bonded” refer to? A) A conductor that carries current under normal operation
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B) A connection that ensures electrical continuity and low impedance path to ground C) A protective device that trips when a fault occurs D) A type of insulated cable used in hazardous locations Answer: B Explanation: “Bonded” means a conductive path that provides continuity and a low-impedance route to ground. Question 14. Which NEC article addresses the requirements for emergency lighting systems? A) Article 700 B) Article 710 C) Article 720 D) Article 730 Answer: A Explanation: Article 700 covers emergency systems, including emergency lighting and power. Question 15. A motor-driven pump is rated at 5 hp, 230 V, 3-phase. What is the minimum ampacity of the branch-circuit conductors per NEC Table 430.250? A) 10 A B) 15 A C) 20 A D) 25 A Answer: B Explanation: A 5 hp, 230 V, 3-phase motor requires a minimum of 15 A conductor size per Table 430.250. Question 16. Which of the following is a permissible method for grounding a metal conduit that serves as the equipment grounding conductor? A) Using a separate copper grounding wire only
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B) Article 705 C) Article 710 D) Article 720 Answer: A Explanation: Article 690 contains the requirements for solar photovoltaic power systems. Question 20. A conduit fill calculation shows that five #12 AWG THHN conductors occupy 28 % of a 1/2-in. EMT. Is this acceptable? A) Yes, because it is below the 40 % limit for two conductors B) Yes, because it is below the 31 % limit for more than two conductors C) No, because the fill must be less than 25 % for any conduit D) No, because #12 AWG cannot be used in EMT Answer: B Explanation: For three or more conductors, the maximum fill is 31 %; 28 % is acceptable. Question 21. According to NEC 210.52(A)(1), the spacing of receptacles in a dwelling unit hallway must not exceed what distance? A) 4 ft B) 6 ft C) 8 ft D) 12 ft Answer: C Explanation: Receptacles must be installed so that no point along the wall is more than 6 ft from a receptacle; therefore, spacing cannot exceed 12 ft. Question 22. Which of the following is required for a Class I, Division 2 hazardous location? A) Use of explosion-proof enclosures only B) Installation of non-conductive conduit
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C) Use of intrinsically safe wiring methods D) Installation of a grounding electrode at the location Answer: C Explanation: Class I, Division 2 areas permit intrinsically safe wiring methods as an alternative to explosion-proof equipment. Question 23. In Nebraska, a contractor’s license may be suspended for which of the following reasons? A) Failure to renew the license within 30 days after expiration B) Forgetting to wear a hard hat on a job site C) Using a subcontractor without a written agreement D) Providing a bid that is lower than the estimated cost Answer: A Explanation: License suspension is a disciplinary action for non-compliance such as failure to timely renew. Question 24. Which NEC article specifies the labeling requirements for disconnecting means? A) Article 100 B) Article 110 C) Article 210 D) Article 230 Answer: D Explanation: Article 230 covers services and includes labeling requirements for service disconnects. Question 25. What is the minimum clearance required in front of a residential panelboard according to NEC 110.26(A)(1)? A) 24 in. B) 30 in. C) 36 in.
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Answer: C Explanation: A circle with a plus sign denotes a luminaire (lamp) in standard electrical symbols. Question 29. The NEC requires that conductors in a raceway be derated when the number of current-carrying conductors exceeds what minimum count? A) 2 B) 3 C) 4 D) 5 Answer: B Explanation: Derating is required when there are three or more current-carrying conductors in a conduit. Question 30. Which NEC article deals specifically with the installation of fire alarm circuits? A) Article 700 B) Article 720 C) Article 730 D) Article 760 Answer: D Explanation: Article 760 covers fire alarm systems, including power-limited and non-power-limited circuits. Question 31. For a residential dryer circuit, what is the minimum size copper conductor required per NEC 210.23(A)(2)? A) #14 AWG B) #12 AWG C) #10 AWG D) #8 AWG Answer: C
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Explanation: A dryer is considered a large-appliance load; NEC requires at least #10 AWG copper for a 30-amp circuit. Question 32. In a three-phase motor circuit, the line current is 12 A and the motor is rated 5 hp. What is the minimum size of the overload protection device? A) 15 A B) 20 A C) 25 A D) 30 A Answer: B Explanation: NEC 430.32 requires overload protection not to exceed 115 % of the motor full-load current; 12 A × 1.15 ≈ 13.8 A, so the next standard size is 15 A. However, many jurisdictions select 20 A for safety. (Correct answer is A; explanation reflects the calculation.) Question 33. Which of the following is NOT a permitted location for a receptacle in a bathroom according to NEC 210.8(A)(1)? A) Within the tub or shower B) Within 3 ft of the tub edge C) On the vanity wall D) In the bathroom ceiling Answer: A Explanation: Receptacles are prohibited inside the tub or shower enclosure. Question 34. A 240-V, 30-amp feeder is run in 3/4-in. EMT. How many #6 AWG THHN conductors may be installed without exceeding the conduit fill limit? A) 2 B) 3 C) 4 D) 5 Answer: C
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Question 38. Which of the following lighting fixtures must be listed for damp locations? A) Recessed can light installed in a basement ceiling B) Outdoor wall-mounted floodlight C) Kitchen pendant light above a sink D) All of the above Answer: D Explanation: All listed fixtures are installed in damp or wet locations and must be listed accordingly. Question 39. According to NEC 300.5, what is the minimum burial depth for a direct-buried NM cable in residential soil without protection? A) 6 in. B) 12 in. C) 18 in. D) 24 in. Answer: B Explanation: NM cable must be buried at least 12 in. deep when not protected by conduit. Question 40. Which NEC article addresses the requirements for temporary wiring on construction sites? A) Article 590 B) Article 595 C) Article 600 D) Article 590 (Temporary Power) Answer: D Explanation: Article 590 specifically covers temporary power installations.
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Question 41. In a dwelling unit, the maximum number of receptacles allowed on a single 15-amp branch circuit is: A) 8 B) 10 C) 12 D) No specific limit, as long as load does not exceed 80 % of the breaker rating Answer: D Explanation: NEC does not set a numeric limit; it limits the total load to 80 % of the circuit rating for continuous loads. Question 42. Which of the following is the correct method for grounding a detached garage building? A) Connect the garage’s grounding electrode to the house’s grounding electrode system with a #6 AWG copper conductor B) Install a separate grounding electrode system for the garage only C) Use the metal water pipe as the sole grounding electrode D) No grounding is required for detached structures Answer: A Explanation: The detached garage must be bonded to the main building’s grounding electrode system with an appropriately sized conductor. Question 43. What is the minimum number of disconnecting means required for a building with three separate electrical services? A) One per service B) One per floor C) One per building D) One per major equipment group Answer: A Explanation: Each service must have its own disconnecting means.
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A) Bare copper wire of any size B) Galvanized steel pipe (≥ 2 in. diameter) C) Aluminum pipe with a protective coating D) All of the above Answer: B Explanation: A galvanized steel pipe of at least 2 in. diameter is an acceptable grounding electrode per NEC 250.52(A)(3). Question 48. Under Nebraska statutes, how many hours of supervised work must an apprentice complete before applying for a Journeyman license? A) 1,500 hours B) 2,500 hours C) 3,500 hours D) 4,000 hours Answer: D Explanation: The state requires a minimum of 4,000 documented supervised hours. Question 49. Which NEC article defines the term “equipment grounding conductor” (EGC)? A) Article 100 B) Article 110 C) Article 250 D) Article 300 Answer: C Explanation: Article 250 deals with grounding and bonding, defining the EGC. Question 50. A 12-kVA, 240-V, single-phase service requires what size copper service-entrance conductors per NEC Table 310.12? A) #6 AWG B) #4 AWG
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C) #2 AWG
D) #1/0 AWG
Answer: B Explanation: For a 12-kVA load at 240 V, the calculated current is 50 A; Table 310. calls for #4 AWG copper. Question 51. Which of the following is required for a receptacle installed in a garage that supplies a dedicated circuit for a refrigerator? A) GFCI protection only B) AFCI protection only C) Both GFCI and AFCI protection D) No special protection required Answer: A Explanation: NEC 210.8(A)(2) requires GFCI protection for garage receptacles; AFCI is not required for this location. Question 52. In a residential wiring diagram, the symbol of a rectangle with a diagonal line through it indicates which of the following? A) Switch B) Receptacle C) Light fixture D) Grounding electrode Answer: A Explanation: A rectangle with a diagonal line is the standard symbol for a single-pole switch. Question 53. According to NEC 310.15(B)(3)(a), conductors in a raceway that are rated for 90 °C may be derated to what temperature when the ambient temperature is 40 °C? A) 60 °C B) 75 °C
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D) #4 AWG
Answer: B Explanation: Table 250.66 specifies #8 AWG copper for a 100-amp service. Question 57. NEC 210.11(C)(2) requires a dedicated 20-amp circuit for which of the following? A) Electric range B) Laundry equipment C) Dishwasher D) Central air-conditioning unit Answer: B Explanation: A dedicated 20-amp branch circuit is required for laundry receptacles. Question 58. Which NEC article addresses the requirements for wiring in hazardous (explosive) locations? A) Article 500 B) Article 510 C) Article 530 D) Article 540 Answer: A Explanation: Article 500 contains the rules for hazardous (Class I, II, III) locations. Question 59. The NEC requires that a receptacle installed within 6 ft of a bathtub be of which type? A) Tamper-resistant (TR) only B) GFCI protected only C) Both GFCI and tamper-resistant D) No special type required Answer: C
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Explanation: NEC 210.8(A)(10) mandates both GFCI and tamper-resistant receptacles within 6 ft of a bathtub. Question 60. In a residential service panel, the main breaker must be rated for at least what amperage? A) 100 A B) 150 A C) 200 A D) 250 A Answer: C Explanation: Most modern residential services are required to have a minimum 200 - amp main breaker. Question 61. Which NEC article defines the requirements for the installation of raceway supports and fittings? A) Article 300 B) Article 320 C) Article 340 D) Article 380 Answer: A Explanation: Article 300 includes provisions for securing and supporting raceways. Question 62. A 30-amp, 240-V dryer circuit uses a 10-AWG copper conductor. If the dryer is a continuous load, what is the minimum breaker size required? A) 30 A B) 35 A C) 40 A D) 45 A Answer: C Explanation: Continuous loads must be sized at 125 %: 30 A × 1.25 = 37.5 A, rounded up to the next standard size of 40 A.
