Download [UTRJEME] Utah UT RJEME Residential Journeyman Electrician Licensing Exam Preparation and more Exams Technology in PDF only on Docsity!
Licensing Exam Preparation | Exam Focused MCQs (2026)
Question 1. In a purely resistive DC circuit, if the voltage is doubled while the resistance remains constant, the current will: A) Remain the same B) Double C) Halve D) Quadruple Answer: B Explanation: Ohm’s Law (I = V/R) shows current is directly proportional to voltage when resistance is unchanged. Question 2. The RMS value of a sinusoidal AC voltage that has a peak of 170 V is: A) 120 V B) 85 V C) 170 V D) 240 V Answer: A Explanation: RMS = Peak/√2; 170 V/1.414 ≈ 120 V. Question 3. In a series circuit with three resistors of 2 Ω, 4 Ω, and 6 Ω, the total resistance is: A) 6 Ω B) 8 Ω C) 10 Ω D) 12 Ω Answer: C
Licensing Exam Preparation | Exam Focused MCQs (2026)
Explanation: Series resistances add: 2 + 4 + 6 = 12 Ω (mistake – correct answer should be 12 Ω). Actually total = 12 Ω, so answer D. Correction: Answer: D – total resistance = 12 Ω. Question 4. In a parallel circuit, the voltage across each branch is: A) The same as the source voltage B) Different for each branch C) Determined by the branch resistance only D) Zero if any branch is open Answer: A Explanation: Parallel branches share the same voltage equal to the source voltage. Question 5. A 240 V, 15 A circuit supplying a water heater will have a power rating of: A) 3 kW B) 3.6 kW C) 4 kW D) 5 kW Answer: C Explanation: Power = V × I = 240 × 15 = 3,600 W = 3.6 kW (so answer B). Correction: Answer: B – 3.6 kW. Question 6. The power factor of a purely inductive load is: A) 0 B) 0. C) 1
Licensing Exam Preparation | Exam Focused MCQs (2026)
B) The conductor that carries fault current to earth C) The neutral conductor that is intentionally bonded to ground at the service D) Any conductor that is physically touching earth Answer: C Explanation: The grounded conductor is the neutral, bonded to earth at the service disconnect. Question 10. The minimum clearance required in front of a residential panelboard to provide working space is: A) 24 in. B) 30 in. C) 36 in. D) 42 in. Answer: C Explanation: NEC 110.26 requires a minimum of 36 in. of clear working space in front of equipment. Question 11. When sizing a branch‑circuit conductor for a continuous load, the NEC requires the conductor to be rated at least: A) 80 % of the load B) 100 % of the load C) 125 % of the load D) 150 % of the load Answer: C Explanation: Continuous loads must be multiplied by 125 % per NEC 210.20(A).
Licensing Exam Preparation | Exam Focused MCQs (2026)
Question 12. A 20‑amp double‑pole breaker protecting a 240‑V dryer must have its rating adjusted for a 125 % continuous load. The dryer draws 16 A continuously. What is the minimum breaker size allowed? A) 20 A B) 25 A C) 30 A D) 40 A Answer: B Explanation: 16 A × 125 % = 20 A; the next standard size above 20 A is 25 A. Question 13. Which of the following is the correct method to calculate box fill for a device box containing one single‑pole switch? A) Count the switch as one conductor B) Count the switch as two conductors C) Count the switch as three conductors D) Do not count the switch at all Answer: B Explanation: A device counts as the equivalent of two conductors (one for the hot and one for the neutral/ground return). Question 14. For a 3‑wire NM cable (black, white, bare) entering a junction box, how many conductors are counted toward box fill? A) 1 B) 2 C) 3 D) 4
Licensing Exam Preparation | Exam Focused MCQs (2026)
D) Flexible metal conduit (FMC) Answer: C Explanation: PVC Schedule 40 conduit is listed for direct burial. Question 18. The ampacity of a 10‑AWG copper conductor with 60 °C insulation in a residential branch circuit is: A) 15 A B) 20 A C) 30 A D) 40 A Answer: C Explanation: According to NEC Table 310.15(B)(16), 10‑AWG copper with 60 °C rating is rated for 30 A. Question 19. When installing a receptacle in a bathroom, which protection is required by NEC? A) AFCI only B) GFCI only C) Both AFCI and GFCI D) Neither – standard receptacle is acceptable Answer: B Explanation: NEC 210.8(A)(1) requires GFCI protection for bathroom receptacles. Question 20. A 1500‑W electric baseboard heater is installed on a 120‑V circuit. What is the minimum size of the overcurrent protective device? A) 10 A B) 15 A
Licensing Exam Preparation | Exam Focused MCQs (2026)
C) 20 A
D) 30 A
Answer: B Explanation: Current = 1500 W / 120 V = 12.5 A. Apply 125 % for continuous load → 15.6 A, so a 20‑A breaker is required. However the nearest standard size is 20 A (answer C). Correction: Answer: C – 20 A. Question 21. Which NEC article governs the installation of ground‑fault circuit interrupters? A) 210 B) 210. C) 250 D) 300 Answer: B Explanation: NEC 210.8 specifies locations where GFCI protection is required. Question 22. The purpose of a main bonding jumper (MBJ) is to: A) Connect the neutral to the equipment grounding conductor at the service disconnect B) Provide a backup ground for the feeder C) Bond all metal water piping to the neutral D) Connect the service entrance conductors to the grounding electrode system Answer: A Explanation: The MBJ bonds the grounded (neutral) conductor to the equipment grounding conductor at the service. Question 23. In Utah, the licensing level “Residential Journeyman Electrician” is authorized to:
Licensing Exam Preparation | Exam Focused MCQs (2026)
Question 26. A motor‑operated ceiling fan is installed in a bedroom. Which protection is required by NEC 2020? A) AFCI only B) GFCI only C) Both AFCI and GFCI D) No special protection required Answer: A Explanation: NEC 210.12 requires AFCI protection for bedroom receptacle and branch‑circuit outlets, which includes fan circuits. Question 27. The voltage rating of a standard residential receptacle (NEMA 5‑15) is: A) 120/240 V B) 250 V C) 120 V D) 208 V Answer: C Explanation: NEMA 5‑15 receptacles are rated for 125 V (commonly referred to as 120 V). Question 28. Which of the following is NOT a permitted use for Type NM cable? A) Inside walls of a dwelling unit B) In a wet location underground C) In a concealed ceiling space D) In a finished basement Answer: B
Licensing Exam Preparation | Exam Focused MCQs (2026)
Explanation: Type NM (Romex) is not rated for wet locations such as direct burial. Question 29. The ampacity correction factor for more than three current‑carrying conductors in a raceway is found in: A) NEC Table 310.15(B)(3)(a) B) NEC Table 310. C) NEC Table 210. D) NEC Table 250. Answer: A Explanation: NEC Table 310.15(B)(3)(a) provides adjustment factors for >3 conductors. Question 30. For a 3‑way lighting circuit, the minimum number of travelers required between the two switches is: A) One B) Two C) Three D) Four Answer: B Explanation: A 3‑way circuit uses two traveler conductors to carry the switched leg. Question 31. The NEC requires a minimum of how many disconnecting means for a detached garage that contains a single branch circuit? A) One B) Two C) Three
Licensing Exam Preparation | Exam Focused MCQs (2026)
B) The name of the installer only C) The date of installation only D) No labeling is required Answer: A Explanation: NEC 690.41 requires a label with system voltage, current, and disconnecting means. Question 35. Which article of the NEC covers the installation of swimming pool equipment? A) 210 B) 250 C) 680 D) 690 Answer: C Explanation: NEC Article 680 addresses swimming pools, hot tubs, and related equipment. Question 36. For a residential dryer vented outdoors, the NEC requires a disconnecting means within how many feet of the appliance? A) 3 ft B) 5 ft C) 10 ft D) 25 ft Answer: B Explanation: NEC 422.31 requires a disconnect within 5 ft of the dryer. Question 37. Which of the following is considered a “dead‑front” device? A) A standard toggle switch
Licensing Exam Preparation | Exam Focused MCQs (2026)
B) A receptacle with a protective cover plate C) A circuit breaker with a visible internal mechanism D) An exposed wiring junction box Answer: B Explanation: A dead‑front device has no live parts exposed; a receptacle with a cover plate meets this definition. Question 38. The NEC permits the use of a single‑pole breaker to protect a 240‑V, single‑phase circuit only if: A) The circuit supplies a 120‑V load B) The breaker is a GFCI type C) The circuit uses a 2‑wire (no neutral) configuration and the breaker has a handle‑tie D) The breaker is rated for 120 V only Answer: C Explanation: A 2‑pole breaker or a single‑pole with handle‑tie is required for 240‑V circuits; a single‑pole alone is not permitted. Question 39. When calculating voltage drop, which factor is NOT considered? A) Conductor resistance B) Load current C) Length of the run D) Color of the insulation Answer: D Explanation: Insulation color has no effect on voltage drop.
Licensing Exam Preparation | Exam Focused MCQs (2026)
Explanation: The NEC recommends tightening to at least 75 % of the terminal’s rated torque; 75 lb‑in × 0.75 = 56 lb‑in, so 55 lb‑in is the nearest standard setting. Question 43. A 30‑A, 240‑V circuit supplies a residential electric range. Which NEC article specifically addresses range circuits? A) 210. B) 210. C) 210. D) 210. Answer: C Explanation: NEC 210.23 covers permissible loads for branch circuits, including ranges. Question 44. When wiring a 4‑way switch, the traveler wires are connected to: A) The common terminals of both switches B) The traveler terminals of all four switches C) The traveler terminals of the two 3‑way switches only D) The traveler terminals of the two 4‑way switches only Answer: D Explanation: In a 4‑way configuration, travelers run between the two 4‑way switches, not to the 3‑way switches. Question 45. The minimum size of a copper grounding electrode conductor for a 200‑A service is: A) 4 AWG B) 2 AWG C) 1/0 AWG
Licensing Exam Preparation | Exam Focused MCQs (2026)
D) 2/0 AWG
Answer: C Explanation: NEC Table 250.66 lists 1/0 AWG copper for a 200‑A service. Question 46. Which of the following devices provides both arc‑fault and ground‑fault protection in a single unit? A) Standard circuit breaker B) Dual‑function AFCI/GFCI breaker C) Surge protective device (SPD) D) Ground‑fault relay Answer: B Explanation: Dual‑function AFCI/GFCI breakers combine both protections. Question 47. According to NEC, a “dedicated” circuit is defined as: A) Any circuit that supplies more than one receptacle B) A circuit that supplies only one appliance or equipment and no other loads C) A circuit that is protected by a GFCI device D) A circuit that is 240 V only Answer: B Explanation: A dedicated circuit serves a single piece of equipment. Question 48. When installing a receptacle in a clothes closet, NEC requires that the receptacle be: A) GFCI protected only if the closet is near a wet location B) AFCI protected only if the closet is on a bedroom circuit C) Installed at a height not exceeding 48 in. above the floor
Licensing Exam Preparation | Exam Focused MCQs (2026)
C) Any receptacle in a garage, regardless of location D) Only those serving countertop appliances Answer: C Explanation: NEC 210.8(A)(2) mandates GFCI protection for all garage receptacles. Question 52. A 250‑V, 30‑A circuit feeding a heat pump requires a breaker sized at least: A) 30 A B) 35 A C) 40 A D) 45 A Answer: C Explanation: Continuous loads must be multiplied by 125 %; 30 A × 125 % = 37.5 A, requiring the next standard size, 40 A. Question 53. The NEC permits the use of a “single‑wire branch circuit” (SWBC) for which of the following? A) Lighting a single fixture in a dwelling unit B) Supplying a receptacle in a kitchen C) Feeding a bathroom fan D) Powering a dryer Answer: A Explanation: SWBCs are allowed for lighting a single fixture where no other loads are present. Question 54. When wiring a three‑phase motor in a residential setting, which NEC article provides the grounding requirements?
Licensing Exam Preparation | Exam Focused MCQs (2026)
A) 430
B) 440
C) 250
D) 210
Answer: C Explanation: NEC 250 covers grounding and bonding for all equipment, including motors. Question 55. The minimum clearance between a water heater and a combustible wall is: A) 1 in. B) 3 in. C) 6 in. D) 12 in. Answer: B Explanation: NEC 422.13 requires at least 3 in. clearance for water heaters. Question 56. Which of the following is true regarding the use of aluminum conductors in residential wiring? A) They may be used for any interior wiring without restriction B) They must be installed with an anti‑oxidant compound at terminations C) They are prohibited in NM cable D) They are only allowed for grounding conductors Answer: B Explanation: Aluminum conductors require anti‑oxidant compound at terminals to prevent corrosion. Question 57. A receptacle installed in a wet location must have a cover that:
