Download [KS554] 554 Kansas Standard Master Electrician Licensing Exam Guide and more Exams Technology in PDF only on Docsity!
Electrician Licensing Exam Guide
Question 1. Which law states that the total voltage around any closed loop in a circuit is zero? A) Ohm’s Law B) Kirchhoff’s Voltage Law C) Faraday’s Law D) Thevenin’s Theorem Answer: B Explanation: Kirchhoff’s Voltage Law (KVL) states that the algebraic sum of all voltages in a closed loop equals zero. Question 2. In NEC Article 100, the term “grounded conductor” refers to which of the following? A) The service neutral B) The equipment grounding conductor C) The ungrounded (hot) conductor D) The bonding jumper Answer: A Explanation: The grounded conductor is the neutral that is intentionally connected to ground at the service point. Question 3. When reading a construction blueprint, a solid line with a solid circle represents which electrical device? A) Receptacle B) Switch C) Light fixture D) Panelboard Answer: C
Electrician Licensing Exam Guide
Explanation: In NEC-standard symbols, a solid circle denotes a luminaire or light fixture. Question 4. The NEC requires a minimum of how many general-purpose receptacles in a living-room area of 300 ft²? A) 2 B) 3 C) 4 D) 5 Answer: B Explanation: NEC 210.52(A)(1) requires at least one receptacle for each 30 ft of wall space, yielding a minimum of three in a 300 ft² room. Question 5. For a single-family residence with a 200-A service, the minimum size of the service-entrance conductors (copper) is: A) 3 AWG B) 2/0 AWG C) 4/0 AWG D) 250 kcmil Answer: C Explanation: Per NEC 310.15(B)(7), a 200-A residential service requires 4/0 AWG copper conductors. Question 6. Which of the following grounding electrode types is NOT permitted for a building’s grounding system? A) Ground-ring electrode B) Concrete-encased electrode (Ufer) C) Metal water pipe not bonded within 5 ft of the service
Electrician Licensing Exam Guide
Question 9. A branch circuit feeding kitchen countertop receptacles must be protected by a GFCI. Which of the following is the correct protection method? A) 20-A GFCI breaker in the panel B) 15-A standard breaker with a receptacle-type GFCI C) Either A or B is acceptable D) No GFCI required if the circuit is 20 A Answer: C Explanation: NEC 210.8(A)(6) permits GFCI protection either at the breaker or at the first receptacle. Question 10. The maximum allowable voltage drop for feeder circuits serving sensitive electronic equipment is: A) 1 % B) 2 % C) 3 % D) 5 % Answer: B Explanation: NEC 210.19(A)(1) recommends a maximum of 3 % total voltage drop, with 2 % for the feeder portion when feeding sensitive equipment. Question 11. Which conduit type is permitted for direct burial without a protective raceway? A) EMT B) RMC C) PVC Schedule 40 D) Flexible metal conduit (FMC) Answer: C
Electrician Licensing Exam Guide
Explanation: PVC Schedule 40 conduit is rated for underground installation without additional protection. Question 12. According to NEC Table 1, the maximum number of 12-AWG THHN conductors that may be installed in a 3/4-in. EMT conduit is: A) 10 B) 13 C) 15 D) 18 Answer: B Explanation: Using the conduit fill tables, a 3/4-in. EMT can accommodate 13 conductors of 12-AWG THHN (40 % fill). Question 13. The required depth for a 4-in. Schedule 80 PVC conduit containing a single 6 AWG THHN circuit, buried under a driveway, is: A) 12 in. B) 18 in. C) 24 in. D) 30 in. Answer: C Explanation: NEC 300.5(D) requires a minimum of 24 in. cover for PVC conduit under a concrete slab or driveway. Question 14. Which cable type is suitable for use in a residential attic without a fire-blocking barrier? A) NM-B (Romex) B) AC (Armored Cable) C) MC (Metal-Clad)
Electrician Licensing Exam Guide
A) 80 %
B) 115 %
C) 125 %
D) 150 %
Answer: B Explanation: NEC 430.32 requires overload protection to be set between 115 % and 125 % of the motor’s FLC; the minimum is 115 %. Question 18. When installing a grounding electrode conductor (GEC) to a concrete-encased electrode, the minimum size of copper GEC required for a 200 - A service is: A) 6 AWG B) 4 AWG C) 2 AWG D) 1/0 AWG Answer: B Explanation: NEC 250.66 specifies a minimum of 4 AWG copper for a 200-A service grounding electrode conductor. Question 19. The NEC permits the use of a single-pole breaker as a disconnecting means for a 120-V branch circuit supplying only one receptacle. This is true or false? Answer: True Explanation: NEC 240.15(B) allows a single-pole breaker to serve as the disconnect for a single-receptacle branch circuit. Question 20. Which of the following is the correct minimum spacing between a receptacle and a countertop edge in a kitchen? A) 6 in.
Electrician Licensing Exam Guide
B) 12 in. C) 18 in. D) No minimum spacing required Answer: B Explanation: NEC 210.52(C)(1) requires at least one receptacle within 12 in. of any countertop edge. Question 21. In a commercial building, the required minimum number of lighting outlets per 100 ft² of floor area is: A) 1 B) 2 C) 3 D) 4 Answer: B Explanation: NEC 220.12 requires 3 VA per square foot for general lighting; assuming 120-V luminaires of 60 VA each, roughly two outlets per 100 ft² are needed. Question 22. Which of the following is NOT a permissible method for bonding the metal raceway that serves as a grounding conductor? A) Using a bonding jumper inside the conduit B) Using a bonding screw at each outlet box C) Relying on the conduit’s continuity alone D) Installing a listed grounding clamp at each connection point Answer: C Explanation: NEC 250.118 requires bonding devices; relying solely on conduit continuity is not acceptable unless the conduit is listed for bonding (e.g., EMT with proper fittings). However, for most raceways, a bonding jumper or clamp is required.
Electrician Licensing Exam Guide
Explanation: NEC 250.66 permits 6 AWG aluminum for a 100-A service. Question 26. The NEC defines “hazardous (Class I) locations” based on the presence of what? A) Flammable gases only B) Combustible dust only C) Flammable vapors, gases, or liquids D) Any combustible material, including dust, gases, or fibers Answer: D Explanation: Class I locations are those where flammable gases, vapors, liquids, or combustible dust may be present. Question 27. In a swimming pool area, the required bonding of all metallic parts must be achieved using a conductor of at least what size? A) 14 AWG copper B) 12 AWG copper C) 10 AWG copper D) 8 AWG copper Answer: C Explanation: NEC 680.26(A)(1) requires a minimum of 10 AWG copper bonding jumper for pool bonding. Question 28. Which of the following devices must be installed in a health-care facility’s patient-care area to provide emergency power? A) Standby generator with automatic transfer switch B) Uninterruptible power supply (UPS) only C) Battery-backed emergency lighting only D) None, as patient-care areas are not required to have emergency power
Electrician Licensing Exam Guide
Answer: A Explanation: NEC 517 requires health-care patient-care areas to be supplied by emergency power, typically via a standby generator with an automatic transfer switch. Question 29. For a 3-phase, 4-wire, 480-V motor circuit, the neutral conductor is required when: A) The motor is a 3-phase, 4-pole motor B) The motor is a 3-phase, 3-wire motor C) The motor is a single-phase, 2-wire motor D) The motor is a 3-phase, 4-wire motor with a 120-V control circuit Answer: D Explanation: A 4-wire system includes a neutral for supplying 120-V control circuits to the motor. Question 30. When a feeder is installed in a raceway that also contains power conductors, the conduit must be sized to accommodate at least what percentage of its cross-sectional area? A) 20 % B) 30 % C) 40 % D) 50 % Answer: C Explanation: NEC Table 1 allows a maximum conduit fill of 40 % for more than two conductors. Question 31. The NEC permits the use of a 15-A GFCI receptacle to protect a 20 - A branch circuit that serves a bathroom vanity. This is:
Electrician Licensing Exam Guide
Question 34. The minimum number of disconnecting means required for a building that has two separate service disconnects located on opposite sides of the building is: A) 1 B) 2 C) 3 D) 4 Answer: B Explanation: NEC 230.71 requires each service disconnect to be readily accessible; two separate disconnects mean two required disconnecting means. Question 35. In a commercial kitchen, the minimum required ampacity for a dedicated 120-V circuit feeding a dishwasher is: A) 15 A B) 20 A C) 30 A D) 40 A Answer: B Explanation: NEC 210.23(A)(2) requires a dedicated 20-A circuit for a dishwasher. Question 36. Which of the following is the correct minimum burial depth for a 6 - in. schedule 80 PVC conduit carrying a 120/240-V feeder under a residential driveway? A) 12 in. B) 18 in. C) 24 in.
Electrician Licensing Exam Guide
D) 30 in. Answer: C Explanation: NEC 300.5(D) requires a minimum of 24 in. cover for PVC conduit under a driveway. Question 37. When a transformer secondary is grounded, the grounding must be performed at which point? A) At the primary side only B) At the secondary side only C) At both primary and secondary sides D) Grounding is optional for transformer secondary Answer: B Explanation: NEC 250.30(A)(1) requires grounding of the transformer secondary at the secondary side. Question 38. Which of the following devices is required to be installed on a 120 - V, 20-A circuit that supplies a garage door opener? A) GFCI breaker B) AFCI breaker C) Both GFCI and AFCI D) Neither GFCI nor AFCI is required Answer: A Explanation: NEC 210.8(A)(2) requires GFCI protection for garage receptacles; garage door openers are considered receptacle loads. Question 39. The NEC permits the use of a 250-V, 30-A receptacle in a residential kitchen. This receptacle must be protected by which type of overcurrent device?
Electrician Licensing Exam Guide
Question 42. Which of the following is the correct minimum rating for a receptacle installed in a laundry room? A) 15 A, 125 V B) 20 A, 125 V C) 15 A, 250 V D) 20 A, 250 V Answer: B Explanation: NEC 210.52(F) requires at least one 20-A, 125-V receptacle in a laundry area. Question 43. The NEC requires that a grounding electrode conductor (GEC) be protected from physical damage. Which of the following methods satisfies that requirement? A) Running the GEC in a raceway underground B) Burying the GEC directly in the earth C) Using a bare copper conductor placed on the surface of a concrete slab D) None of the above Answer: A Explanation: NEC 250.68(A) allows protection of the GEC by placing it in a raceway. Question 44. In an industrial plant, a motor control center (MCC) must have a minimum rating of: A) 100 A B) 200 A C) 400 A D) No minimum rating; it depends on the load Answer: D
Electrician Licensing Exam Guide
Explanation: NEC does not prescribe a minimum MCC rating; it must be sized to the connected load. Question 45. The required spacing between a receptacle and the edge of a bathtub is: A) 12 in. B) 18 in. C) 24 in. D) No spacing required if GFCI protected Answer: C Explanation: NEC 210.8(A)(10) requires bathroom receptacles to be at least 24 in. from the edge of the bathtub. Question 46. Which of the following is the correct minimum size for a copper grounding electrode conductor (GEC) connecting to a 4-inch diameter ground rod? A) 12 AWG B) 10 AWG C) 8 AWG D) 6 AWG Answer: B Explanation: NEC 250.66 requires a minimum of 10 AWG copper for a ground rod of any size. Question 47. An outdoor receptacle that is installed within 6 ft of a swimming pool must be protected by: A) A GFCI breaker only B) A GFCI receptacle only
Electrician Licensing Exam Guide
Question 50. The NEC allows a single receptacle to serve a dedicated circuit for a residential electric range. This statement is: A) True B) False Answer: A Explanation: NEC 210.23(A)(2) permits a single receptacle to serve a dedicated appliance circuit such as an electric range. Question 51. When using MC cable for a feeder, the cable must be supported at intervals not exceeding: A) 4 ft. B) 6 ft. C) 8 ft. D) 10 ft. Answer: B Explanation: NEC 334.30 requires MC cable to be supported at intervals not exceeding 6 ft. Question 52. The minimum conduit size required for a 4-wire, 100-A feeder using 2/0 AWG copper conductors is: A) 1-in. EMT B) 3/4-in. EMT C) 1-in. RMC D) 1-in. PVC Answer: A Explanation: Using conduit fill tables, 2/0 AWG copper requires at least a 1-in. EMT for four conductors.
Electrician Licensing Exam Guide
Question 53. Which NEC article governs the installation of fire alarm systems? A) Article 210 B) Article 300 C) Article 700 D) Article 800 Answer: C Explanation: NEC Article 700 covers emergency systems, including fire alarm circuits. Question 54. A 120/240-V, 30-A dryer circuit must be protected by a breaker with a maximum rating of: A) 30 A B) 35 A C) 40 A D) 45 A Answer: C Explanation: NEC 210.23(B) requires a 125 % rating; 30 A × 1.25 = 37.5 A, so the next standard size is 40 A. Question 55. The NEC permits the use of a 12-AWG copper grounding electrode conductor (GEC) for a 100-A service when the grounding electrode is a concrete-encased electrode. This is: A) Allowed B) Not allowed Answer: B Explanation: NEC 250.66 requires a minimum of 4 AWG copper for a 100-A service, regardless of electrode type.
