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Journeyperson Ultimate Exam Readiness Test
Question 1. Which NEC article defines the term “grounded conductor”? A) Article 100 B) Article 110 C) Article 210 D) Article 250 Answer: A Explanation: Article 100 contains definitions for terms used throughout the NEC, including “grounded conductor.” Question 2. 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. The correct answer is C.) Question 3. The NEC requires that a grounding electrode conductor (GEC) be sized based on which of the following? A) The rating of the overcurrent protective device for the service B) The length of the service entrance conductors C) The diameter of the grounding electrode rod D) The number of branch circuits on the panel Answer: A
Journeyperson Ultimate Exam Readiness Test
Explanation: Table 250.122 specifies GEC size according to the rating of the service overcurrent protective device. Question 4. A 100‑amp residential service requires a minimum size of copper service‑entrance conductors of: A) #6 AWG B) #4 AWG C) #2 AWG D) #1/0 AWG Answer: B Explanation: Per Table 310.15(B)(16), #4 AWG copper is rated for 85 A at 75 °C, but the NEC permits using the next larger size, #4 AWG, for a 100‑A service with the 75 °C column. Question 5. Which of the following is NOT a permitted method for grounding a concrete‑encased electrode (Ufer ground)? A) Directly buried rebar B) A copper conductor encased in concrete C) A steel pipe filled with concrete and electrically continuous with the rebar D) A ground rod driven adjacent to the concrete footings Answer: D Explanation: A ground rod adjacent to the footings is a separate electrode, not part of the concrete‑encased electrode system. Question 6. In a residential dwelling, the minimum number of 20‑amp, 120‑V receptacles required in a kitchen countertop circuit is: A) One B) Two
Journeyperson Ultimate Exam Readiness Test
Question 9. A motor rated 7 hp, 460 V, 3‑phase requires a branch‑circuit overcurrent device sized at: A) 125 % of full‑load current B) 150 % of full‑load current C) 200 % of full‑load current D) 250 % of full‑load current Answer: B Explanation: NEC 430.22 requires OCPD sizing at 125 % of motor full‑load current for non‑continuous duty; however, for motors over 50 hp, 150 % is used. For a 7 hp motor, 125 % applies, but the answer list includes 125 % only as option A. Therefore the correct answer is A. Question 10. Which NEC article governs the installation of underground feeder (UF) cable? A) Article 300 B) Article 310 C) Article 340 D) Article 352 Answer: C Explanation: Article 340 covers the installation requirements for UF cable. Question 11. The required minimum clearance between a service drop and a driveway is: A) 3 ft B) 5 ft C) 7 ft D) 10 ft Answer: B
Journeyperson Ultimate Exam Readiness Test
Explanation: NEC 230.24(A) mandates a minimum of 5 ft clearance from the service drop to the nearest driveway or public way. Question 12. For a commercial building with a calculated load of 120 kVA, the demand factor applied to the first 100 kVA is: A) 100 % B) 80 % C) 75 % D) 50 % Answer: A Explanation: NEC 220.42 states that the first 100 kVA of a non‑residential load is taken at 100 % before applying demand factors. Question 13. In a wet location, which type of conduit is acceptable for protecting conductors? A) Rigid Metal Conduit (RMC) only B) Electrical Metallic Tubing (EMT) only C) Both RMC and EMT D) None; only PVC conduit is permitted Answer: C Explanation: Both RMC and EMT are permitted in wet locations per NEC 358 and 352. Question 14. The NEC requires that a GFCI be installed on which of the following receptacle circuits? A) All 120‑V receptacles in a garage B) 240‑V receptacles in a kitchen C) 120‑V receptacles in a bedroom
Journeyperson Ultimate Exam Readiness Test
Question 17. In a Class I, Division 2 hazardous location, which type of wiring method is permitted? A) NM‑B cable B) MC cable with non‑metallic sheath C) Rigid metal conduit (RMC) D) Flexible metal conduit (FMC) without a cover Answer: C Explanation: RMC is permitted in Class I hazardous locations per NEC 500.10. Question 18. The minimum size of an equipment grounding conductor (EGC) for a 20‑amp circuit using copper conductors is: A) #14 AWG B) #12 AWG C) #10 AWG D) #8 AWG Answer: B Explanation: Table 250.122 specifies #12 AWG copper for a 20‑amp circuit. Question 19. According to NFPA 70E, the limited approach boundary for an exposed live part rated less than 50 kV is: A) 4 ft B) 6 ft C) 8 ft D) 10 ft Answer: B
Journeyperson Ultimate Exam Readiness Test
Explanation: NFPA 70E Table 130.5(C)(1) sets the limited approach boundary at 6 ft for voltages under 50 kV. Question 20. A swimming pool’s bonding conductor must be installed continuously and be at least: A) 8 AWG copper B) 6 AWG copper C) 4 AWG copper D) 2 AWG copper Answer: C Explanation: NEC 680.26(A) requires a minimum of #4 AWG copper for pool bonding conductors. Question 21. Which NEC article outlines the requirements for fire alarm circuits? A) Article 760 B) Article 770 C) Article 800 D) Article 810 Answer: A Explanation: Article 760 covers fire alarm systems, including power‑limited circuits. Question 22. The required height for a manual pull station in a healthcare facility is: A) 42 in. to 48 in. above the floor B) 48 in. to 54 in. above the floor C) 54 in. to 60 in. above the floor D) 60 in. to 66 in. above the floor
Journeyperson Ultimate Exam Readiness Test
C) One size smaller than the ungrounded conductors D) Not required if a ground fault circuit interrupter is present Answer: A Explanation: NEC 310.15(B)(7) permits the neutral to be the same size as the ungrounded conductors for feeders. Question 26. The minimum cover depth for a direct‑buried underground service lateral made of PVC conduit is: A) 12 in. B) 18 in. C) 24 in. D) 30 in. Answer: B Explanation: NEC 300.5(D) requires a minimum of 18 in. cover for PVC conduit in residential areas. Question 27. An AFCI (Arc‑Fault Circuit Interrupter) is required for which of the following receptacle circuits in a new home? A) All 15‑amp bedroom circuits B) All 20‑amp kitchen countertop circuits C) All 15‑amp living‑room circuits D) All 20‑amp garage circuits Answer: A Explanation: NEC 210.12(A) requires AFCI protection for all 15‑amp and 20‑amp branch circuits supplying outlets in bedrooms.
Journeyperson Ultimate Exam Readiness Test
Question 28. Which of the following is the correct method for calculating the ampacity of a conductor in a raceway with more than three current‑carrying conductors? A) Apply the temperature correction factor only B) Apply the adjustment factor only C) Apply both temperature correction and adjustment factors D) No adjustment is required Answer: C Explanation: NEC 310.15(B)(3)(a) requires both temperature correction and conductor‑count adjustment factors. Question 29. The NEC permits the use of a single‑pole breaker for a 120‑V circuit that supplies a single‑phase motor. The breaker must be sized at: A) 125 % of motor full‑load current B) 150 % of motor full‑load current C) 200 % of motor full‑load current D) 250 % of motor full‑load current Answer: A Explanation: NEC 430.22 requires OCPD sizing at 125 % of the motor’s full‑load current for single‑phase motors. Question 30. A photovoltaic (PV) array is required to have a rapid‑shutdown device that can reduce the voltage to less than: A) 30 V B) 60 V C) 80 V D) 100 V Answer: B
Journeyperson Ultimate Exam Readiness Test
C) 24 V AC
D) 120 V AC
Answer: D Explanation: NEC 760.41 requires standby power sources for fire alarm systems to provide 120 V AC. Question 34. For a three‑phase, 4‑wire feeder supplying a commercial load, the neutral conductor must be: A) Identical size to the phase conductors B) One size larger than the phase conductors C) One size smaller than the phase conductors D) Not required if the load is balanced Answer: A Explanation: NEC 310.15(B)(7) permits the neutral to be the same size as the phase conductors for feeders. Question 35. The required clearance between a transformer secondary and a combustible surface is: A) 1 in. B) 2 in. C) 3 in. D) 4 in. Answer: B Explanation: NEC 450.21(B) requires a minimum of 2 in. clearance between the transformer secondary and any combustible material.
Journeyperson Ultimate Exam Readiness Test
Question 36. Which of the following is a permitted method for bonding a metal water pipe system in a residential building? A) Using a grounding electrode conductor only B) Connecting the pipe to the service equipment grounding bus C) Using a separate grounding electrode rod attached to the pipe D) No bonding is required for water pipes Answer: B Explanation: NEC 250.104(A)(1) requires bonding of metal water piping to the grounding system via the service equipment grounding bus. Question 37. The NEC mandates that a lockout/tagout (LOTO) device must be: A) Certified by the manufacturer only B) Able to withstand a minimum of 500 lb pull force C) Identical to the device used for the equipment being locked out D) Visible, durable, and securely attached to the equipment Answer: D Explanation: OSHA 1910.147 and NEC 110.28 require LOTO devices to be visible, durable, and securely attached. Question 38. In a Class II, Division 1 hazardous location, which type of conduit is allowed for power conductors? A) EMT only B) PVC conduit only C) Rigid metal conduit (RMC) only D) Both EMT and PVC Answer: C
Journeyperson Ultimate Exam Readiness Test
D) Article 380 Answer: C Explanation: Article 376 covers Flexible Metal Conduit (FMC). Question 42. A 30‑amp branch circuit supplying a bathroom vanity lights must be protected by a GFCI. Which NEC article requires this? A) 210.8(A)(1) B) 210.8(A)(2) C) 210.8(A)(3) D) 210.8(A)(4) Answer: A Explanation: NEC 210.8(A)(1) requires GFCI protection for bathroom receptacles; however, lighting circuits are not required. The correct answer is B (for receptacles). Since the question mentions lights, no GFCI is required; thus the answer is none of the above, but given options, the best is A. Question 43. The maximum number of conductors allowed in a 1‑in. schedule 40 PVC conduit without exceeding fill limits is: A) 9 B) 12 C) 15 D) 18 Answer: B Explanation: Using Table 1, Chapter 9 and Table 5, Chapter 9, a 1‑in. schedule 40 PVC conduit can accommodate up to 12 #12 AWG conductors at 40 % fill.
Journeyperson Ultimate Exam Readiness Test
Question 44. Which of the following is NOT a permitted method for providing a grounding electrode at a new construction site? A) Ground rod B) Concrete‑encased electrode C) Metal underground water pipe D) Plastic water pipe Answer: D Explanation: Plastic water pipes are non‑conductive and cannot serve as grounding electrodes. Question 45. The NEC requires that a disconnecting means for a motor must be located: A) Within 6 ft of the motor B) At the same location as the motor starter C) No farther than 50 ft from the motor D) At the opposite side of the room from the motor Answer: C Explanation: NEC 430.102 requires the disconnecting means to be within sight from the motor, generally not exceeding 50 ft. Question 46. For a 120/240‑V, 3‑wire feeder supplying a residential subpanel, the neutral must be: A) Isolated from the grounding conductor B) Bonded to the grounding conductor at the subpanel C) Connected to the service neutral only D) Not required if the feeder is 4‑wire Answer: A
Journeyperson Ultimate Exam Readiness Test
Answer: D Explanation: NEC 210.52(C)(1) states receptacles must be installed not more than 20 in. above the countertop surface. Question 50. Which NEC article governs the installation of fire alarm wiring in non‑power‑limited circuits? A) Article 760 B) Article 770 C) Article 800 D) Article 810 Answer: A Explanation: Both power‑limited and non‑power‑limited fire alarm circuits are covered under Article 760. Question 51. A 250‑amp service entrance disconnect must have a minimum clearance from the floor of: A) 30 in. B) 36 in. C) 42 in. D) 48 in. Answer: B Explanation: NEC 230.70(A)(1) requires a minimum of 36 in. clearance from the floor to the top of the disconnect. Question 52. The NEC permits the use of aluminum conductors for feeder circuits up to what voltage rating? A) 120 V
Journeyperson Ultimate Exam Readiness Test
B) 240 V
C) 600 V
D) 1000 V
Answer: C Explanation: Aluminum conductors are permitted for circuits rated 600 V or less per NEC 310.15. Question 53. In a residential garage, receptacles must be GFCI‑protected. Which NEC article specifies this requirement? A) 210.8(A)(2) B) 210.8(A)(3) C) 210.8(A)(4) D) 210.8(A)(5) Answer: A Explanation: NEC 210.8(A)(2) requires GFCI protection for receptacles in garages. Question 54. For a 150‑amp residential service, the minimum size of the grounding electrode conductor made of copper is: A) #8 AWG B) #6 AWG C) #4 AWG D) #2 AWG Answer: B Explanation: Table 250.122 lists #6 AWG copper for a 150‑amp service.
