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Question 1. Which Virginia statute defines the minimum competence standards for a licensed electrician? A) Virginia Code § 54.1‑ 2600 B) Virginia Administrative Code § 18‑ 101 ‑ 10 C) Virginia Board of Contractors Rule 23‑ 12 ‑ 5 D) Virginia Occupational Safety and Health Act § 20‑ 50 ‑ 1 Answer: B Explanation: The Virginia Administrative Code (VAC) § 18‑ 101 ‑10 sets the competency, diligence, and quality‑of‑work standards for electricians licensed by DPOR. Question 2. Under Virginia law, an electrician who knowingly submits a false work‑order to obtain a permit commits which prohibited act? A) Misrepresentation B) Negligence C) Unlicensed practice D) Fraudulent billing Answer: A Explanation: Misrepresentation includes any false statement made to obtain a permit or license; it is grounds for disciplinary action. Question 3. How many Continuing Professional Education (CPE) hours must a Virginia master electrician complete every two years? A) 4 B) 6 C) 8 D) 10
Answer: C Explanation: The DPOR requires 8 CPE hours for master electricians in each renewal cycle. Question 4. Which of the following is NOT a required element in a Virginia electrician’s license renewal packet? A) Proof of CPE completion B) A copy of the most recent inspection report C) Renewal application fee receipt D) Updated contact information form Answer: B Explanation: Inspection reports are not required for renewal; only CPE proof, fee receipt, and contact updates are needed. Question 5. In Virginia, a journeyman electrician may supervise an apprentice for how many hours per day without additional supervision? A) 6 hours B) 8 hours C) 10 hours D) No limit, provided a master is on‑site Answer: D Explanation: Virginia law requires that a master electrician be on‑site to supervise apprentices; there is no hourly cap for journeyman supervision. Question 6. According to NEC Article 90, the primary purpose of the NEC is to: A) Promote energy efficiency B) Protect public safety from electrical hazards
A) A recommendation B) A mandatory requirement C) An optional guideline D) An industry best practice Answer: B Explanation: “Shall” indicates a mandatory rule that must be followed. Question 10. Ohm’s Law is expressed as: A) V = I × R B) P = V / I C) I = V + R D) R = P × I Answer: A Explanation: Ohm’s Law states voltage equals current times resistance (V = I·R). Question 11. In a three‑phase, four‑wire wye system, the line‑to‑neutral voltage is 120 V. What is the line‑to‑line voltage? A) 120 V B) 208 V C) 240 V D) 277 V Answer: B Explanation: Line‑to‑line = √ 3 × line‑to‑neutral; 120 V × 1.732 ≈ 208 V.
Question 12. Which component stores energy in an electric field? A) Inductor B) Transformer C) Capacitor D) Resistor Answer: C Explanation: Capacitors store energy in an electric field between their plates. Question 13. When calculating load for a dwelling, the NEC requires the general lighting load to be: A) 1 VA per square foot B) 3 VA per square foot C) 5 VA per square foot D) 10 VA per square foot Answer: B Explanation: Article 220.12 specifies 3 VA per square foot for general lighting loads in dwelling units. Question 14. The demand factor for the first 10 kW of a household’s cooking equipment is: A) 100 % B) 80 % C) 60 % D) 40 % Answer: A Explanation: NEC Table 220.55 allows 100 % of the first 10 kW of cooking appliances.
Explanation: NEC 230.24 requires a minimum of 18 in clearance from windows, doors, or other openings. Question 18. Which article of the NEC defines the requirements for grounding electrode systems? A) 250 B) 300 C) 410 D) 500 Answer: A Explanation: Article 250 covers grounding and bonding, including electrode systems. Question 19. A grounding electrode conductor (GEC) made of 4 AWG copper is required for which of the following grounding electrodes? A) Concrete‑encased electrode (Ufer) B) Ground rod of 5 ft length C) Metal water pipe (≤ 1 in diameter) D) All of the above Answer: D Explanation: NEC 250.68(A) permits 4 AWG copper GEC for all listed electrode types. Question 20. The equipment grounding conductor (EGC) size for a 30‑amp branch circuit using 10 AWG copper conductors must be: A) 12 AWG B) 10 AWG C) 8 AWG
D) 6 AWG
Answer: A Explanation: Table 250.122 specifies a 12 AWG copper EGC for a 30 A circuit. Question 21. Which correction factor is applied when three current‑carrying conductors are bundled in a raceway at 40 °C ambient temperature? A) 0. B) 0. C) 1. D) 1. Answer: B Explanation: For 3 conductors, NEC Table 310.15(B)(3)(a) gives a 0.9 temperature correction factor at 40 °C. Question 22. THHN insulation is rated for a maximum temperature of: A) 60 °C B) 75 °C C) 90 °C D) 105 °C Answer: C Explanation: THHN (Thermoplastic High Heat‑resistant Nylon) is rated for 90 °C in dry locations. Question 23. When installing a splice in a junction box, the box must be sized to contain at least how many cubic inches per conductor? A) 2 in³
Question 26. In a health‑care facility, the required voltage for critical branch circuits is: A) 120 V B) 208 V C) 277 V D) 480 V Answer: D Explanation: NEC 517.4 requires critical branch circuits to be supplied from a 480 V system to ensure reliability and reduced voltage drop. Question 27. For an assembly occupancy, the required minimum egress lighting illumination level is: A) 0.5 lux B) 1 lux C) 5 lux D) 10 lux Answer: B Explanation: NEC 410.36(A) mandates a minimum of 1 lux for egress illumination in assembly occupancies. Question 28. The required ampere rating for a motor‑branch‑circuit protective device (MPCB) for a 5 ‑hp, 230‑V, three‑phase motor is: A) 20 A B) 30 A C) 40 A D) 50 A Answer: C
Explanation: Using NEC Table 430.250, a 5‑hp, 230‑V, 3‑phase motor requires a 40‑A MPCB (considering 125 % of full‑load current). Question 29. Which NEC article governs the installation of swimming‑pool equipment? A) 680 B Question 30. A 240‑V, 30‑amp dryer circuit must be protected by a circuit breaker rated at: A) 20 A B) 30 A C) 35 A D) 40 A Answer: B Explanation: The OCPD must not exceed the branch‑circuit rating; a 30‑A breaker matches the dryer’s requirement. Question 31. The minimum size of a grounding electrode conductor for a 100‑amp service using copper is: A) 8 AWG B) 6 AWG C) 4 AWG D) 2 AWG Answer: C Explanation: Table 250.122 specifies 4 AWG copper for a 100‑A service.
Explanation: Article 760 covers fire alarm systems, including wiring methods and power sources. Question 35. A conduit fill of 53 % is permissible for which type of raceway? A) Rigid metal conduit (RMC) B) Electrical metallic tubing (EMT) C) Flexible metal conduit (FMC) D) All of the above Answer: A Explanation: Rigid metal conduit allows up to 53 % fill for one or two conductors; EMT and FMC are limited to 40 % and 40 % respectively. Question 36. The required minimum clearance between a suspended ceiling light fixture and the ceiling surface is: A) 1 in B) 2 in C) 3 in D) 4 in Answer: B Explanation: NEC 410.10(A) requires a minimum of 2 in clearance for suspended ceiling luminaires. Question 37. For a 120/240‑V, single‑phase residential service, the neutral conductor must be sized at least: A) Same size as the ungrounded conductors B) One size larger than the ungrounded conductors C) Half the size of the ungrounded conductors
D) No neutral is required Answer: A Explanation: NEC 230.42 requires the neutral to be at least the same size as the largest ungrounded conductor. Question 38. Which of the following is a permissible method for grounding a metal conduit that serves as the equipment grounding conductor? A) Using a separate grounding wire only B) Relying on the conduit’s continuity alone C) Installing a grounding clamp at each box D) Both B and C are acceptable Answer: D Explanation: Metal conduit can serve as an equipment grounding conductor if it is continuous and properly bonded with clamps at each enclosure. Question 39. The maximum length of a flexible cord used for a portable electric heater is: A) 25 ft B) 50 ft C) 75 ft D) No specific limit, but must be protected from damage Answer: D Explanation: NEC 400.7 does not set a length limit for flexible cords; they must be protected from physical damage and used within their ampacity limits. Question 40. In a Class II, Division 1 hazardous location, which type of conduit is required? A) Rigid metal conduit (RMC)
Question 43. A 15‑amp receptacle in a dwelling unit must be supplied from a branch circuit protected at: A) 10 A B) 15 A C) 20 A D) 30 A Answer: C Explanation: NEC 210.21(B)(3) permits 15‑amp receptacles on a 20‑amp branch circuit. Question 44. Which of the following is the correct method to size a feeder for a 30‑kW commercial load at 480 V, three‑phase? A) Use 4 AWG copper B) Use 2 AWG aluminum C) Use 1/0 AWG copper D) Use 3/0 AWG aluminum Answer: C Explanation: 30 kW / (√3 × 480 V) = 36 A. 1/0 AWG copper (rated 125 A) comfortably exceeds the required ampacity after derating. Question 45. The NEC requires that a disconnecting means for a motor be located: A) Within 6 ft of the motor B) Within sight of the motor C) Within 30 ft of the motor D) Anywhere in the building Answer: B
Explanation: Article 430.102 requires the disconnect to be “within sight” of the motor, meaning visible and readily accessible without passing through a door. Question 46. Which of the following is a permissible grounding electrode for a new residential building? A) A 4‑ft copper rod driven 6 ft into the earth B) The building’s steel frame alone C) A 2‑ft stainless‑steel rod D) A plastic pipe buried underground Answer: A Explanation: A copper grounding electrode rod of at least 4 ft in length is acceptable per NEC 250.52(A)(5). Question 47. In a residential kitchen, the required number of 20‑amp small‑appliance branch circuits is: A) One B) Two C) Three D) Four Answer: B Explanation: NEC 210.11(C)(1) requires at least two 20‑amp small‑appliance circuits for the kitchen countertop receptacles. Question 48. The minimum height for a receptacle installed in a garage is: A) 12 in above the floor B) 18 in above the floor
Question 51. A 30‑amp, 240‑V dryer requires a neutral conductor for which of the following reasons? A) To balance the load B) To supply the dryer’s 120‑V controls C) To provide a grounding path D) No neutral is required Answer: B Explanation: Electric dryers often have 120‑V control circuits that require a neutral. Question 52. Which of the following is the correct voltage rating for a Class II, Division 2 hazardous‑location conduit? A) 300 V B) 600 V C) 1000 V D) 1500 V Answer: B Explanation: NEC 500.10 limits hazardous‑location conductors and raceways to 600 V. Question 53. The minimum clearance between a service entrance conductor and a swimming‑pool water surface is: A) 6 ft B) 8 ft C) 10 ft D) 12 ft Answer: C
Explanation: NEC 680.26 requires a minimum of 10 ft clearance from the pool water surface to service conductors. Question 54. In a data center, the recommended maximum voltage drop for feeder conductors is: A) 1 % B) 2 % C) 3 % D) 5 % Answer: B Explanation: NEC 210.19(A)(1) recommends limiting voltage drop to 2 % for feeders to critical loads. Question 55. Which of the following is NOT a permitted use for NM‑B cable? A) Residential interior wiring B) Underground conduit C) Commercial office building interior D) Garage attached to a dwelling Answer: B Explanation: NM‑B (Romex) is not rated for direct burial; it must be protected in conduit if installed underground. Question 56. The required ampacity for a 3‑wire, 120/240‑V feeder supplying a 30‑amp dryer and a 20 ‑amp range is: A) 30 A B) 40 A C) 50 A
