Download Hawaii HI Journey Worker Specialty Electrician Learning Course Exam and more Exams Technology in PDF only on Docsity!
Learning Course Exam
Question 1. Which law states that the sum of currents entering a junction equals the sum of currents leaving the junction? A) Ohm’s Law B) Kirchhoff’s Current Law C) Faraday’s Law D) Lenz’s Law Answer: B Explanation: Kirchhoff’s Current Law (KCL) governs the conservation of charge at a node, requiring that the algebraic sum of currents be zero. Question 2. In a purely resistive AC circuit, the power factor is: A) 0 B) 0. C) 1 D) - 1 Answer: C Explanation: For resistive loads, voltage and current are in phase, giving a power factor of unity (1). Question 3. The NEC article that defines the purpose and scope of the code is: A) Article 90 B) Article 100 C) Article 110 D) Article 210 Answer: A Explanation: Article 90 provides the introduction, purpose, and scope of the National Electrical Code. Question 4. When selecting a conduit size for three #6 AWG THHN conductors, you must consult which NEC table?
Learning Course Exam
A) Table 310.15(B)(16) B) Table 1, Chapter 9 C) Table 300. D) Table 330. Answer: B Explanation: Table 1 in Chapter 9 lists conduit fill percentages and allowable numbers of conductors for each conduit size. Question 5. The ampacity of a #12 copper conductor with 75°C insulation in a raceway is: A) 15 A B) 20 A C) 25 A D) 30 A Answer: B Explanation: According to Table 310.15(B)(16), a #12 copper conductor with 75°C rating has an ampacity of 20 A. Question 6. Which of the following is NOT a permitted use for NM‑B cable in Hawaii? A) Residential interior wiring B) Underground feeder in a wet location C) Lighting circuits in a dwelling D) Branch circuits in a garage Answer: B Explanation: NM‑B cable is not rated for wet locations; it cannot be used underground. Question 7. The minimum size of an equipment grounding conductor for a 60 A circuit using copper conductors is: A) #10 AWG B) #12 AWG
Learning Course Exam
Answer: C Explanation: Article 376 specifically addresses Flexible Metal Conduit (FMC) requirements. Question 11. The voltage drop limit recommended for feeder circuits supplying sensitive electronic equipment is: A) 1% B) 2% C) 3% D) 5% Answer: B Explanation: NEC recommends limiting voltage drop to 2% for feeders feeding sensitive equipment to maintain performance. Question 12. For a 120/240‑V single‑phase residential service, the minimum size of the service entrance conductors (copper) is: A) #6 AWG B) #4 AWG C) #2 AWG D) #8 AWG Answer: B Explanation: Per NEC Table 310.12, a 100‑A service requires minimum #4 AWG copper conductors. Question 13. Which of the following devices must be GFCI‑protected in a Hawaiian hotel’s pool area? A) Above‑ground pool pump motor B) Underwater lighting fixtures C) Outdoor wall‑mounted receptacle within 6 ft of the pool edge D) Interior hallway lighting Answer: C
Learning Course Exam
Explanation: NEC 210.8(A) requires GFCI protection for receptacles within 6 ft of a pool. Question 14. The NEC definition of a “raceway” includes all of the following EXCEPT: A) Electrical metallic tubing (EMT) B) Rigid metal conduit (RMC) C) Cable tray D) Flexible non‑metallic conduit (FNC) Answer: D Explanation: Flexible non‑metallic conduit (e.g., NM‑B) is classified as a cable, not a raceway. Question 15. The required working clearance in front of a panelboard rated 600 V or less is: A) 24 in. wide, 30 in. deep, 36 in. high B) 30 in. wide, 36 in. deep, 42 in. high C) 36 in. wide, 42 in. deep, 48 in. high D) No clearance required if the panel is locked Answer: A Explanation: NEC 110.26(A)(1) specifies a minimum of 30 in. in front of the panel and a width equal to the panel’s width, with a minimum depth of 36 in. Question 16. Which of the following is the correct method for calculating box fill for a device that requires two conductors, one equipment grounding conductor, and one internal clamp? A) Count each conductor as one volume unit, ground as half, clamp as one B) Count each conductor as one, ground as one, clamp as one C) Count each conductor as one, ground as one, clamp as one/ D) Count each conductor as one, ground as one/2, clamp as one/ Answer: B Explanation: NEC 314.16(B) requires counting each conductor that terminates in the box, the equipment grounding conductor, and each internal clamp as one conductor volume.
Learning Course Exam
A) 6 ft B) 8 ft C) 10 ft D) No specific height, only front clearance applies Answer: D Explanation: NEC requires front working clearance but does not specify a minimum height above the panelboard. Question 21. Which of the following is the correct size of a grounding electrode conductor (GEC) for a 200 A service using copper? A) #8 AWG B) #6 AWG C) #4 AWG D) #2 AWG Answer: C Explanation: Table 250.122 specifies #4 AWG copper for a 200 A service. Question 22. The NEC permits the use of a 15‑A GFCI receptacle in a bathroom for which of the following loads? A) Hair dryer only B) Electric shaver only C) Any combination of bathroom appliances up to 15 A total D) None; a 20‑A GFCI is required Answer: C Explanation: NEC 210.8(A)(1) requires at least one 20‑A GFCI receptacle in a bathroom, but a 15‑A GFCI can serve a single appliance load as long as the total does not exceed its rating. Question 23. When installing a feeder to a detached garage, the grounding electrode system must be: A) Connected to the main building’s grounding electrode only
Learning Course Exam
B) Separate and installed at the garage structure C) Omitted if the feeder has a grounding conductor D) Shared with the service entrance conductors of the main building Answer: B Explanation: NEC 250.32(A) requires a grounding electrode at each detached structure. Question 24. Which type of conduit is most appropriate for a corrosive marine environment on a Hawaiian beachfront? A) EMT B) PVC Schedule 40 C) Rigid Metal Conduit (RMC) with a zinc coating D) Flexible Metal Conduit (FMC) Answer: B Explanation: PVC conduit is non‑metallic and resists corrosion, making it suitable for marine environments. Question 25. The NEC definition of “service” includes which of the following? A) The wiring inside a building that distributes power to branch circuits B) The point at which the utility’s wiring connects to the building’s wiring C) Only the utility transformer D) The main disconnecting means only Answer: B Explanation: “Service” is defined as the point of connection between the utility system and the building’s wiring. Question 26. For a three‑phase, 4‑wire, 120/208‑V feeder, the neutral conductor must be sized at least: A) Same size as the phase conductors B) One size larger than the phase conductors
Learning Course Exam
Answer: C Explanation: Permanent wiring is not temporary; NEC 590 applies to temporary installations only. Question 30. The correct color coding for a grounded (neutral) conductor in a 2020 NEC‑compliant installation is: A) White or gray B) Green C) Black D) Red Answer: A Explanation: NEC 200.6 designates white or gray for grounded (neutral) conductors. Question 31. A “dedicated circuit” is defined as a circuit that supplies: A) Multiple lighting loads only B) One specific appliance or equipment only C) All receptacles on a floor D) Both lighting and receptacles in a room Answer: B Explanation: A dedicated circuit supplies only one piece of equipment, such as a refrigerator or HVAC unit. Question 32. Which NEC article governs the installation of fire alarm systems? A) Article 300 B) Article 760 C) Article 700 D) Article 800 Answer: C Explanation: Article 700 covers emergency systems, including fire alarm wiring.
Learning Course Exam
Question 33. The minimum size of a grounding electrode conductor for a 100 A service using aluminum is: A) #8 AWG B) #6 AWG C) #4 AWG D) #2 AWG Answer: B Explanation: Table 250.122 lists #6 AWG aluminum for a 100 A service. Question 34. When using a conduit body (LB) for a 90° bend, the NEC requires that the conduit body be: A) Listed for use with more than one conductor B) Filled to 100% of its internal volume C) Equipped with a pull string if more than 2 conductors are present D) Not used with more than 2 conductors of any size Answer: C Explanation: NEC 314.28 requires a pull string in conduit bodies when more than two conductors are present. Question 35. The term “overcurrent device” includes which of the following? A) Fuses only B) Circuit breakers only C) Both fuses and circuit breakers D) Only protective relays Answer: C Explanation: An overcurrent device is any device that protects a circuit by interrupting excessive current, including fuses and circuit breakers. Question 36. For a 120‑V, 20‑A lighting circuit, the minimum wire size required (copper, THHN) is:
Learning Course Exam
C) A hard hat only D) Steel‑toe boots only Answer: B Explanation: PPE includes insulated gloves, flame‑resistant clothing, safety glasses, hard hats, and appropriate footwear. Question 40. When reading a wiring diagram, the symbol “∩” typically represents: A) A ground connection B) A neutral conductor C) A line (hot) conductor D) A switch Answer: D Explanation: In most wiring symbols, “∩” denotes a single‑pole switch. Question 41. Which NEC article specifies the requirements for “lockout/tagout” procedures? A) Article 110. B) Article 210. C) Article 300. D) Article 500. Answer: A Explanation: Article 110.28 outlines the requirements for lockout/tagout of electrical equipment. Question 42. The NEC requires that a grounding electrode be installed within how many feet of the building’s service entrance? A) 5 ft B) 10 ft C) 20 ft D) No specific distance, but it must be accessible Answer: D
Learning Course Exam
Explanation: NEC 250.53(A)(1) requires the grounding electrode to be accessible; no specific distance from the service entrance is mandated. Question 43. In a commercial building, a “dedicated lighting circuit” must be sized for: A) 15 A only B) 20 A only C) 30 A only D) The calculated load per NEC Table 220. Answer: D Explanation: NEC Table 220.42 provides the lighting load calculation, which determines the required circuit size. Question 44. Which of the following is the correct method for grounding a metal conduit system? A) Ground only at the service equipment B) Ground at each outlet box C) Use a grounding conductor sized per Table 250.122 and bond at each junction box D) No grounding is required for metal conduit Answer: C Explanation: Metal conduit must be bonded with an equipment grounding conductor sized per Table 250.122 at each junction. Question 45. The NEC permits the use of a 15‑A receptacle on a 20‑A branch circuit provided that: A) The receptacle is GFCI protected B) No more than two receptacles are installed on that circuit C) The circuit supplies only lighting loads D) The receptacle is part of a multi‑outlet assembly Answer: D Explanation: NEC 210.21(B)(3) allows 15‑A receptacles on a 20‑A circuit when they are part of a multi‑outlet device.
Learning Course Exam
B) #10 AWG
C) #8 AWG
D) #6 AWG
Answer: B Explanation: NEC Table 310.15(B)(16) indicates #10 AWG copper is suitable for 30 A at 75°C. Question 50. Which NEC article governs the installation of “low‑voltage” (≤ 30 V) lighting systems? A) Article 210 B) Article 410 C) Article 725 D) Article 800 Answer: C Explanation: Article 725 addresses Class 2 and Class 3 circuits, which include low‑voltage lighting. Question 51. A “circuit conductor” in the NEC is defined as: A) Only the ungrounded (hot) conductor B) The combination of ungrounded, grounded, and equipment grounding conductors C) Any insulated or bare conductor that carries current D) Only the grounded (neutral) conductor Answer: C Explanation: NEC 100 defines a circuit conductor as any insulated or bare conductor that carries current. Question 52. The NEC requires that a receptacle in a hallway be installed at a maximum height of: A) 48 in. above the finished floor B) 54 in. above the finished floor C) 72 in. above the finished floor D) No height limit is specified for hallway receptacles Answer: D
Learning Course Exam
Explanation: NEC does not set a specific height for hallway receptacles; placement follows practical considerations. Question 53. Which of the following is the correct grounding method for a metal water pipe that is not in direct contact with the earth for at least 5 ft? A) No grounding required B) Bond to the grounding electrode system using a #6 copper conductor C) Use a #12 copper grounding electrode conductor attached to the pipe D) Connect to the nearest neutral conductor Answer: C Explanation: NEC 250.52(A)(1) requires bonding to metal water piping using a grounding electrode conductor sized per Table 250.122; #12 copper is typical for many installations. Question 54. The NEC permits the use of “metallic raceways” as a grounding means only when: A) The raceway is continuous and bonded at each end B) The raceway is less than 50 ft long C) The raceway is PVC‑coated D) The raceway is used for low‑voltage circuits only Answer: A Explanation: Continuous metal raceways provide an effective grounding path when bonded at each termination. Question 55. Which of the following is a requirement for a “temporary power distribution” panel used on a construction site? A) Must be rated for outdoor use only B) Must be listed as a “portable” panelboard C) Must be installed in a permanent location D) Must have a built‑in GFCI for each circuit Answer: B Explanation: NEC 590.4 requires temporary panels to be listed as portable or temporary use equipment.
Learning Course Exam
Question 59. Which of the following is the correct voltage rating for a receptacle installed in a Hawaiian hotel’s guest room? A) 120 V only B) 240 V only C) 120/240 V (dual) D) Either 120 V or 120/240 V depending on the design Answer: D Explanation: Guest rooms may have either 120‑V or 120/240‑V receptacles based on the building’s design and load requirements. Question 60. In a conduit system, the “fill percentage” for more than two conductors must not exceed: A) 10% B) 20% C) 30% D) 40% Answer: C Explanation: NEC 310.15(C)(1) limits conduit fill to 40% for one or two conductors, but for three or more conductors the limit is 40% of the conduit’s cross‑sectional area; however, the allowable fill is limited to 40% of the conduit’s internal area, which translates to 30% for more than two conductors in most tables. (The standard rule is 40% for one or two, 31% for three or more; the exam typically expects 40% for two or fewer and 31% for three or more.) Question 61. Which NEC article deals with “signs and outline lighting”? A) Article 410 B) Article 590 C) Article 600 D) Article 720 Answer: B
Learning Course Exam
Explanation: Article 590 covers temporary installations, but “signs and outline lighting” are addressed in Article 590.3 (temporary) and Article 590.4 (permanent). However, the primary article for signs is Article
Question 62. The required grounding conductor size for a 400 A service using copper is: A) #2 AWG B) #1/0 AWG C) #4/0 AWG D) #3/0 AWG Answer: C Explanation: Table 250.122 specifies #4/0 AWG copper for a 400 A service. Question 63. Which of the following devices must be installed in a “wet location” as defined by NEC? A) Standard duplex receptacle B) GFCI receptacle rated for indoor use only C) Outdoor-rated GFCI receptacle with a weatherproof cover D) Standard toggle switch Answer: C Explanation: Outdoor GFCI receptacles in wet locations must be weatherproof and listed for wet locations. Question 64. When installing a receptacle in a “restricted access” area, the NEC requires that the receptacle be: A) Locked in the “on” position B) Equipped with a tamper‑resistant (TR) design C) Mounted at least 6 ft above the floor D) Covered with a metal plate Answer: B
