Download PrepIQ City of Tallahassee JOURNEYMAN ELECTRICIAN 2017 ENGLISH OR SPANISH Ultimate Exam and more Exams Technology in PDF only on Docsity!
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Question 1. Which NEC article defines the term “accessible” as used in electrical installations? A) Article 90 B) Article 100 C) Article 110 D) Article 210 Answer: B Explanation: Article 100 provides definitions for terms used throughout the NEC, including “accessible.” Question 2. The “Six-Disconnect Rule” limits the number of service disconnects in a building to how many? A) 4 B) 5 C) 6 D) 8 Answer: C Explanation: NEC 230.71 permits a maximum of six service disconnects in a single enclosure. Question 3. When sizing a service-entrance conductor for a residential dwelling, which factor is NOT considered in the ampacity calculation? A) Ambient temperature B) Conductor material C) Length of the conductor D) Number of breakers downstream
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Answer: D Explanation: The number of downstream breakers does not affect ampacity; temperature, material, and length (voltage drop) are relevant. Question 4. According to NEC 210.52(A), how many receptacle outlets are required in a kitchen’s countertop space? A) 1 B) 2 C) 3 D) 4 Answer: B Explanation: Minimum of two 20-amp receptacles are required for countertop spaces. Question 5. Which of the following is the correct minimum clearance from a service drop to a window opening? A) 3 ft B) 6 ft C) 8 ft D) 10 ft Answer: B Explanation: NEC 230.24 requires a minimum of 6 ft clearance from a service drop to any opening. Question 6. For a feeder supplying a continuous load of 80 A, which overcurrent protective device rating is permitted? A) 80 A
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Question 9. In a raceway, the maximum number of #12 AWG THHN conductors that may be installed in a 3/4-in. EMT is: A) 6 B) 9 C) 12 D) 15 Answer: B Explanation: Using Chapter 9 Table 1, 3/4-in. EMT has a fill area of 0.533 in²; each #12 THHN occupies 0.013 in², allowing up to 9 conductors (≤ 40 % fill). Question 10. Which article governs the installation of luminaires in wet locations? A) Article 300 B) Article 410 C) Article 410 D) Article 410 Answer: B Explanation: Article 410 covers luminaires, including requirements for wet locations. Question 11. A motor-starting circuit requires a thermal overload set at 115 % of full-load amps (FLA). If the motor’s FLA is 20 A, what is the overload setting? A) 22 A B) 23 A C) 24 A D) 25 A
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Answer: C Explanation: 20 A × 1.15 = 23 A; the next standard setting is 24 A. Question 12. For a 120/240-V single-phase dwelling service, the minimum size of the service-entrance grounded conductor (neutral) is: A) Same size as the ungrounded conductors B) One size larger than the ungrounded conductors C) One size smaller than the ungrounded conductors D) No neutral required Answer: A Explanation: NEC 230.42 requires the grounded conductor to be the same size as the ungrounded conductors for single-phase services. Question 13. Which of the following wiring methods is permitted in a residential garage for a 30-A branch circuit? A) NM cable only B) MC cable only C) RMC conduit only D) EMT conduit only Answer: B Explanation: NM cable is not allowed in garages for circuits >20 A; MC cable is permitted. Question 14. The minimum height for a receptacle outlet installed in a bathroom is: A) 12 in. above the floor B) 15 in. above the floor
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Question 17. What is the maximum distance a flexible metal conduit (FMC) can run unsupported? A) 3 ft B) 4 ft C) 6 ft D) 8 ft Answer: B Explanation: NEC 376.30 limits FMC to 4 ft between supports. Question 18. Which of the following is NOT a permissible use for Type NM cable? A) Inside walls of a dwelling B) In a buried underground raceway C) In a finished basement D) In a residential attic Answer: B Explanation: NM cable may not be used in direct burial; it must be in a raceway for underground use. Question 19. For a 3-phase, 4-wire feeder supplying a 30 kVA transformer, what is the minimum size of the grounding electrode conductor (GEC) required? A) 8 AWG copper B) 6 AWG copper C) 4 AWG copper D) 2 AWG copper Answer: C
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Explanation: The feeder’s GEC must be sized per Table 250.66; for a 30 kVA transformer, 4 AWG copper is the minimum. Question 20. The required clearance between a pool pump motor and the pool edge is: A) 3 ft B) 5 ft C) 6 ft D) 8 ft Answer: C Explanation: NEC 680.23 requires a minimum of 6 ft clearance between pool equipment and the pool’s water surface. Question 21. Which NEC article specifically addresses requirements for hazardous (Class I) locations? A) Article 500 B) Article 505 C) Article 510 D) Article 520 Answer: A Explanation: Article 500 covers Class I hazardous (combustible dust) locations. Question 22. A dwelling unit has a total calculated load of 45 kVA. According to the optional method in Article 220, what is the demand factor applied to the first 10 kVA? A) 100 %
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Question 25. In a commercial building, the required number of receptacles per 100 ft² of floor area (excluding kitchen and restroom areas) is: A) 1 B) 2 C) 3 D) 4 Answer: B Explanation: NEC 210.52(A)(3) requires at least one receptacle for each 100 ft² of floor area. Question 26. A 30-A, 240-V dryer circuit must have which type of disconnecting means? A) A fused disconnect B) A 2-pole breaker with a dedicated branch circuit C) A 1-pole breaker with a dedicated branch circuit D) No disconnect required Answer: B Explanation: NEC 422.31 requires a dedicated 2-pole breaker for dryer circuits. Question 27. Which of the following is the correct minimum conduit fill percentage for a raceway containing more than two conductors? A) 20 % B) 30 % C) 40 % D) 50 %
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Answer: C Explanation: NEC Chapter 9 Table 1 states a maximum fill of 40 % for raceways with three or more conductors. Question 28. The purpose of a main bonding jumper (MBJ) is to: A) Connect the neutral to the grounding electrode system B) Provide a backup ground for the service equipment C) Bond the equipment grounding conductor to the grounded conductor D) Connect the service disconnect to the building’s grounding system Answer: A Explanation: The MBJ bonds the service neutral to the grounding electrode system per NEC 250.102(C)(1). Question 29. Which of the following is NOT a permitted location for a receptacle in a laundry room? A) Within 12 in. of the washing machine B) Over a countertop C) On a wall behind the dryer D) At floor level Answer: D Explanation: NEC 210.52(F) does not permit floor-level receptacles in laundry rooms. Question 30. For a 4-wire, 120/240-V feeder, the neutral conductor may be used as a grounding conductor under which condition? A) When the feeder is underground B) When the feeder supplies a single-phase load only
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Question 33. Which of the following devices must be installed on a branch circuit that supplies a bathroom vanity light? A) GFCI receptacle B) AFCI breaker C) No special device required D) Dual-function GFCI/AFCI breaker Answer: C Explanation: NEC does not require GFCI or AFCI protection for a bathroom vanity light, only for receptacles. Question 34. The maximum number of receptacles allowed on a single 20 - A branch circuit in a dwelling unit 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 limits the load to 80 % of the breaker rating (16 A for a 20-A circuit); the number of receptacles is not prescribed. Question 35. Which conduit material is permitted for use in a wet location where the conduit will be exposed to direct sunlight? A) Rigid Metal Conduit (RMC) only B) Electrical Metallic Tubing (EMT) only C) PVC conduit only D) Both RMC and PVC are permitted
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Answer: D Explanation: Both RMC (metallic) and PVC (non-metallic) are approved for wet locations and sunlight exposure. Question 36. The minimum size of a grounding electrode conductor for a 200 - A service is: A) 6 AWG copper B) 4 AWG copper C) 2 AWG copper D) 1/0 AWG copper Answer: B Explanation: Table 250.122 lists 4 AWG copper for a 200-A overcurrent device. Question 37. In a commercial office building, the required spacing between luminaires for a general lighting layout is typically: A) 4 ft × 4 ft B) 6 ft × 6 ft C) 8 ft × 8 ft D) Determined by illumination calculations, not a fixed spacing Answer: D Explanation: NEC does not prescribe fixed spacing; lighting design is based on illumination calculations. Question 38. Which of the following is a required feature of a receptacle installed in a dwelling’s kitchen to serve a countertop? A) Tamper-resistant (TR) type only
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Question 41. A 120-V, 15-A receptacle in a garage must be protected by a GFCI. Which NEC article mandates this? A) 210.8(A)(2) B) 210.8(A)(3) C) 210.8(A)(4) D) 210.8(A)(5) Answer: A Explanation: Article 210.8(A)(2) requires GFCI protection for garage receptacles. Question 42. For a three-wire, 120/240-V feeder to a subpanel, how many neutral conductors are required? A) 0 B) 1 C) 2 D) 3 Answer: B Explanation: A four-wire feeder (two hots, one neutral, one equipment grounding conductor) supplies a subpanel; only one neutral is needed. Question 43. Which of the following is prohibited in a hazardous (Class I) location? A) Explosion-proof enclosures B) Intrinsically safe wiring methods C) Standard NM cable D) Rigid metal conduit with gasketed fittings Answer: C
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Explanation: NM cable is not permitted in hazardous locations; it lacks the required protection. Question 44. The minimum size of a grounding electrode conductor for a 400 - A service is: A) 2 AWG copper B) 1/0 AWG copper C) 2/0 AWG copper D) 4/0 AWG copper Answer: C Explanation: Table 250.122 lists 2/0 AWG copper for a 400-A overcurrent device. Question 45. When installing a receptacle in a bathroom, what is the minimum ampere rating required for the circuit? A) 15 A B) 20 A C) 30 A D) 40 A Answer: B Explanation: NEC 210.11(C)(3) requires a dedicated 20-A circuit for bathroom receptacles. Question 46. A conduit run includes a 90-degree bend. According to NEC, the maximum number of 90-degree bends between supports is: A) 2 B) 3
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Question 49. Which NEC article addresses the installation of electric vehicle (EV) charging equipment? A) Article 625 B) Article 630 C) Article 640 D) Article 650 Answer: A Explanation: Article 625 covers EV charging systems. Question 50. The minimum conductor size for a 100-A feeder using copper THHN in a 75 °C column is: A) #4 AWG B) #3 AWG C) #2 AWG D) #1 AWG Answer: B Explanation: Per Table 310.15(B)(16), #3 AWG copper THHN is rated for 100 A at 75 °C. Question 51. For a 120-V, 10-A lighting circuit, the maximum length of a flexible cord used as a branch-circuit conductor is: A) 25 ft B) 50 ft C) 75 ft D) No length limit if protected by a listed cord set Answer: D
JOURNEYMAN ELECTRICIAN 2017
ENGLISH OR SPANISH Ultimate Exam
Explanation: NEC permits flexible cords of any length when used as a listed cord set, provided protection is adequate. Question 52. Which of the following devices must be installed on a branch circuit supplying a dishwasher? A) GFCI receptacle B) AFCI breaker C) Dedicated 20-A circuit with a GFCI breaker D) No special device required Answer: C Explanation: NEC 210.8(A)(6) requires GFCI protection for dishwashers, and a dedicated 20-A circuit is typical. Question 53. The minimum spacing between a receptacle and a bathtub edge is: A) 3 ft B) 4 ft C) 6 ft D) 8 ft Answer: C Explanation: NEC 210.8(A)(3) requires a minimum of 3 ft; however, for safety, many jurisdictions require 6 ft. The NEC minimum is 3 ft. Question 54. Which of the following is the correct method for calculating box fill for a device box containing a single-pole switch? A) Count the switch as one conductor B) Count the switch as two conductors
