Download PrepIQ Utah UT JEME Journeyman Electrician Ultimate Exam and more Exams Technology in PDF only on Docsity!
Electrician Ultimate Exam
Question 1. Which formula correctly expresses Ohm’s Law for a DC circuit? A) P = V × I B) V = I × R C) I = V ÷ P D) R = P ÷ I Answer: B Explanation: Ohm’s Law states that voltage (V) equals current (I) multiplied by resistance (R), so V = I × R. Question 2. A 120 V branch circuit supplies a 1.5 kW electric heater. What is the current drawn by the heater? A) 8 A B) 12.5 A C) 15 A D) 18 A Answer: B Explanation: I = P ÷ V = 1500 W ÷ 120 V = 12.5 A. Question 3. In a series circuit with three resistors of 10 Ω, 20 Ω, and 30 Ω, what is the total resistance? A) 10 Ω B) 20 Ω C) 30 Ω D) 60 Ω Answer: D Explanation: Resistances in series add directly: 10 + 20 + 30 = 60 Ω. Question 4. Two 120 V loads, each drawing 10 A, are connected in parallel. What is the total current supplied by the source? A) 10 A
Electrician Ultimate Exam
B) 15 A
C) 20 A
D) 30 A
Answer: C Explanation: Parallel currents add: 10 A + 10 A = 20 A. Question 5. According to NEC Chapter 3, what is the minimum conduit fill for a single 1/2-in. EMT conduit when pulling three #12 THHN conductors? A) 20 % B) 30 % C) 40 % D) 53 % Answer: B Explanation: Annex C of the NEC limits conduit fill to 30 % for more than two conductors in a single conduit. Question 6. What is the allowable ampacity of a 3-wire #6 AWG copper conductor in a 75 °C raceway, per NEC Table 310.16? A) 40 A B) 55 A C) 65 A D) 75 A Answer: C Explanation: Table 310.16 lists 65 A for #6 AWG copper at 75 °C. Question 7. When installing NM-B (Romex) cable in a finished basement, the cable must be protected from physical damage by: A) Running it through PVC conduit the entire length. B) Securing it within 8 in. of each box and every 4½ ft thereafter. C) Leaving it exposed on the surface of the joists.
Electrician Ultimate Exam
D) Dual-function GFCI/AFCI breaker Answer: D Explanation: Dual-function breakers combine GFCI and AFCI protection in one device. Question 11. A 12-kVA electric water heater is installed in a dwelling. Using NEC demand factor for a single appliance, what is the design load (kVA) for the service? A) 12 kVA B) 9 kVA C) 6 kVA D) 3 kVA Answer: B Explanation: NEC Table 220.54 applies a 75 % demand factor for the first 10 kVA and 100 % for the remainder. 12 kVA × 0.75 = 9 kVA. Question 12. For a residential service, the “83 % rule” applies to which calculation? A) Voltage drop in feeders. B) Sizing of the service entrance conductors. C) Ground-fault protection coordination. D) Load-calculation demand factors. Answer: B Explanation: The 83 % rule (NEC 230.42) states that the service conductors must be sized to carry 83 % of the calculated load. Question 13. Which of the following is the correct size of an Equipment Grounding Conductor (EGC) for a 20-A circuit protected by a 20-A breaker, per NEC Table 250.122? A) #14 AWG copper B) #12 AWG copper
Electrician Ultimate Exam
C) #10 AWG copper D) #8 AWG copper Answer: B Explanation: Table 250.122 specifies #12 AWG copper for a 20-A overcurrent device. Question 14. When bonding a metal swimming pool shell, which NEC article governs the required bonding jumper size? A) Article 250 B) Article 300 C) Article 680 D) Article 430 Answer: C Explanation: Article 680 deals with swimming pools, spas, and hot tubs, including bonding requirements. Question 15. A photovoltaic (PV) system on a residential roof must have a rapid-shutdown function that disconnects the DC conductors within what distance from the array? A) 3 ft B) 6 ft C) 10 ft D) 30 ft Answer: B Explanation: NEC 2020 690.12 requires the rapid-shutdown to be effective within 6 ft of the array. Question 16. Under Utah Construction Trades Licensing Act, how often must a Journeyman Electrician renew their license? A) Every 1 year B) Every 2 years
Electrician Ultimate Exam
C) Three D) Four Answer: B Explanation: A 4-way switch uses two traveler wires connecting it to the adjacent 3 - way switches. Question 20. The minimum clearance between a service drop and a grounded metal water pipe in a residential yard is: A) 3 ft B) 4 ft C) 5 ft D) 6 ft Answer: B Explanation: NEC 230.24 requires a minimum 4-ft clearance from the service drop to grounded metal water piping. Question 21. Which of the following is the correct torque setting for a #12 AWG copper conductor termination on a listed terminal rated for 60 °C? A) 30 in-lb B) 45 in-lb C) 60 in-lb D) 80 in-lb Answer: B Explanation: NEC 110.14(C)(1) and manufacturer data typically call for 45 in-lb torque for #12 AWG at 60 °C. Question 22. For a 120/240-V single-phase residential service, the neutral conductor must be sized at least: A) Same size as the largest ungrounded conductor. B) One size smaller than the largest ungrounded conductor.
Electrician Ultimate Exam
C) Half the size of the largest ungrounded conductor. D) Not required if a 4-wire feeder is used. Answer: A Explanation: NEC 230.42 requires the neutral to be at least the same ampacity as the largest ungrounded conductor. Question 23. Which NEC article governs the installation of receptacles in damp locations such as unfinished basements? A) Article 210 B) Article 300 C) Article 410 D) Article 410 Answer: A Explanation: Article 210 includes requirements for receptacle placement in damp locations. Question 24. When calculating voltage drop, which of the following is the most common allowable percentage for a branch circuit? A) 1 % B) 2 % C) 3 % D) 5 % Answer: C Explanation: NEC recommends a maximum of 3 % voltage drop for branch circuits to maintain efficiency. Question 25. A residential feeder supplies a 150-A service. Using the standard method, which of the following conductor sizes is minimum for the feeder’s ungrounded conductors? A) #2 AWG copper B) #4 AWG copper
Electrician Ultimate Exam
B) 20
C) 30
D) No limit Answer: B Explanation: NEC 408.54 limits a panelboard to 42 circuit spaces; rows are typically limited to 20 devices per row for practical reasons, but the code does not set a strict per-row limit. The most common practice is 20 per row, making B the best answer. Question 29. Which type of conduit is permitted for direct burial without a separate raceway? A) EMT B) RMC C) PVC (Schedule 40) D) Flexible metal conduit (FMC) Answer: C Explanation: PVC Schedule 40 conduit is rated for direct burial per NEC 352.10. Question 30. A three-wire NM cable is run from a panel to a kitchen countertop receptacle. How many grounding conductors are required within the cable? A) None – the cable’s sheath is sufficient. B) One bare or green insulated conductor. C) Two bare or green insulated conductors. D) One copper and one aluminum conductor. Answer: B Explanation: NM cable must contain a single equipment grounding conductor (bare or green). Question 31. Which of the following is the correct NEC reference for the requirement of AFCI protection in bedrooms?
Electrician Ultimate Exam
A) 210.8(A)(1)
B) 210.12(A)
C) 210.12(B)
D) 210.8(A)(2)
Answer: B Explanation: NEC 210.12(A) requires AFCI protection for all 120-V, 15- and 20-A branch circuits supplying outlets in bedrooms. Question 32. When installing a recessed luminaire in a ceiling of a residential bathroom, what is the minimum clearance required between the fixture and the ceiling surface? A) ¼ in. B) ½ in. C) ¾ in. D) 1 in. Answer: B Explanation: NEC 410.116 requires a minimum ½-in. clearance for recessed fixtures to allow for heat dissipation. Question 33. Which of the following is the proper method for grounding a metal conduit that serves as the equipment grounding conductor? A) No grounding is required if the conduit is metallic. B) Install a grounding clamp at each box. C) Use a grounding screw at the service panel only. D) Attach a bonding jumper at each conduit splice. Answer: B Explanation: NEC 250.118 requires grounding clamps at each enclosure where the conduit enters a box. Question 34. A 20-A branch circuit supplies a bathroom receptacle. Which device provides the required GFCI protection?
Electrician Ultimate Exam
A) Only AFCI. B) Only GFCI. C) Both AFCI and GFCI. D) Neither AFCI nor GFCI. Answer: B Explanation: NEC 210.8(A)(2) requires GFCI protection for all garage receptacles; AFCI is not required. Question 38. Which of the following is the correct size for a grounding electrode conductor attached to a 100-A service? A) #12 AWG copper B) #10 AWG copper C) #8 AWG copper D) #6 AWG copper Answer: C Explanation: Table 250.122 lists #8 AWG copper for a 100-A overcurrent device. Question 39. In a residential panel, a double-pole breaker supplies a 240-V water heater. How many spaces does this breaker occupy? A) 1 B) 2 C) 3 D) 4 Answer: B Explanation: A double-pole breaker occupies two adjacent spaces in the panel. Question 40. Which NEC article governs the installation of luminaires in damp locations such as unfinished basements? A) Article 410 B) Article 300
Electrician Ultimate Exam
C) Article 210 D) Article 430 Answer: A Explanation: Article 410 deals with luminaires, including requirements for damp and wet locations. Question 41. A residential feeder is rated for 125 A. Using the 75 °C column of Table 310.16, what is the minimum copper conductor size? A) #3 AWG B) #2 AWG C) #1 AWG D) #1/0 AWG Answer: B Explanation: At 75 °C, #2 AWG copper is rated for 115 A, which is insufficient. The next size up, #1 AWG copper, is rated for 130 A, meeting the 125-A requirement. Since #1 AWG is the correct size, the answer should be C. (Correct answer based on options: C.) Question 42. What is the minimum height above the floor for a receptacle installed in a residential kitchen countertop? A) 12 in. B) 15 in. C) 18 in. D) No height requirement Answer: D Explanation: NEC does not specify a minimum height for countertop receptacles; they must be installed “not more than 20 in. above the countertop” (210.52(C) (5)) but there is no minimum. Question 43. For a 240-V, 20-A dryer circuit, what is the required size of the equipment grounding conductor?
Electrician Ultimate Exam
A) Article 210 B) Article 300 C) Article 410 D) Article 430 Answer: A Explanation: NEC 210.11(C)(2) mandates a minimum 20-A branch circuit for laundry receptacles. Question 47. When performing a box-fill calculation, a device (switch or receptacle) counts as how many volume units? A) One unit per conductor entering the box. B) Two units per device. C) Four units per device. D) Six units per device. Answer: C Explanation: NEC 314.16(B) states that each yoke-mounted device counts as 4 volume units. Question 48. The maximum allowable temperature rise for a conductor protected by a 60 °C rated termination is: A) 30 °C B) 45 °C C) 60 °C D) 75 °C Answer: B Explanation: Conductors must not exceed the temperature rating of the termination; a 60 °C termination allows a 45 °C temperature rise above ambient (typically 30 °C ambient), resulting in a maximum of 75 °C conductor temperature.
Electrician Ultimate Exam
Question 49. Which of the following is the correct method to identify a 12-kV underground service laterals? A) Color-code the conduit with orange tape. B) Install a warning marker at least 2 ft above ground. C) Use a metal raceway only. D) No identification is required. Answer: B Explanation: NEC 230.52 requires warning markers for underground service laterals. Question 50. In a residential panel, a 15-A AFCI breaker is installed on a circuit supplying a bedroom. Which of the following devices is NOT required on this circuit? A) GFCI receptacle. B) Standard receptacle. C) AFCI breaker. D) None of the above; all are required. Answer: A Explanation: AFCI protection satisfies the code for bedrooms; GFCI is not required unless the circuit also supplies a bathroom or other GFCI-required area. Question 51. A 150-ft run of #12 AWG copper conductors supplies a 120-V load drawing 20 A. What is the approximate voltage drop? (Use 2 Ω per 1000 ft for #12 AWG.) A) 0.6 V B) 1.2 V C) 3.0 V D) 6.0 V Answer: C Explanation: Resistance = (2 Ω/1000 ft) × 150 ft = 0.3 Ω. Voltage drop = I × R = 20 A × 0.3 Ω = 6 V for one-way; round-trip doubles to 12 V. However, the
Electrician Ultimate Exam
Explanation: OSHA recommends a 75-degree angle for ladders; however, the most common safe practice for a portable ladder is a 60-degree angle to ensure stability. (Answer: C.) Question 55. Which of the following is the correct NEC reference for the requirement that a service disconnect be installed within sight of the service entrance? A) 230. B) 230. C) 230. D) 230.71(A) Answer: A Explanation: NEC 230.71 requires the service disconnect to be installed "within sight" of the service equipment. Question 56. A 20-A GFCI breaker is installed in a panel to protect a bathroom circuit. Which of the following statements is true? A) The breaker provides both GFCI and AFCI protection. B) The breaker must be a two-pole device. C) The breaker will protect all downstream receptacles on that circuit. D) The breaker must be installed on a dedicated circuit only. Answer: C Explanation: A GFCI breaker protects the entire branch circuit downstream of the breaker. Question 57. For a residential feeder supplying a second-floor panel, the maximum allowable length of the feeder without a voltage-drop correction is: A) 50 ft B) 75 ft C) 100 ft D) No specific limit; calculation required.
Electrician Ultimate Exam
Answer: D Explanation: NEC does not set a fixed length limit; voltage-drop calculations must be performed for any length. Question 58. Which of the following is the correct method for grounding a metal water pipe that is not in direct contact with the earth? A) Connect a grounding electrode to the pipe. B) Bond the pipe to the service grounding electrode conductor. C) No grounding is required for metal water pipe. D) Use a separate grounding rod placed near the pipe. Answer: B Explanation: NEC 250.104(A) requires bonding of metal water piping to the grounding electrode system. Question 59. When installing a conduit system in a fire-rated wall, the conduit must be: A) PVC only. B) Listed for fire-rated assemblies. C) Uncoated steel. D) No special requirements. Answer: B Explanation: NEC 300.21 requires that penetrations through fire-rated assemblies be made with listed fire-rated fittings and conduits. Question 60. In Utah, the minimum age to obtain a Journeyman Electrician license is: A) 16 years B) 18 years C) 21 years D) 25 years
