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Question 1. Which Oregon Revised Statutes (ORS) chapter governs the licensing of electrical contractors? A) ORS 475 B) ORS 479 C) ORS 482 D) ORS 486 Answer: B Explanation: ORS Chapter 479 contains the statutes that define licensing, certification, and regulatory requirements for electrical work in Oregon. Question 2. Under OAR 918‑ 030 ‑002, how often must a licensed electrician complete continuing education? A) Every year B) Every two years C) Every three years D) Every five years Answer: B Explanation: OAR 918‑ 030 ‑002 requires electricians to complete at least 24 hours of continuing education every two years to maintain licensure. Question 3. When is a permit required for a new residential service entrance in Oregon? A) Only if the service is over 100 A B) For any new service entrance regardless of size C) Only for commercial installations D) Permit is not required for residential service entrances Answer: B
Explanation: Oregon law mandates a permit for any new service entrance installation, whether residential or commercial, to ensure inspection and compliance. Question 4. Which of the following is NOT a mandatory inspection item for a new service entrance? A) Service entrance conductors B) Grounding electrode system C) Overcurrent protection device rating D) Interior lighting fixture wattage Answer: D Explanation: Interior lighting fixture wattage is not inspected for service entrance compliance; the other three items are required inspections. Question 5. According to Oregon certification rules, an electrical product must be listed by which organization to be installed? A) ANSI B) UL or an equivalent NRTL C) IEEE D) OSHA Answer: B Explanation: Products must be listed by a Nationally Recognized Testing Laboratory (NRTL) such as UL, ETL, or equivalent to be approved for installation. Question 6. Ohm’s Law is expressed as: A) V = I × R B) P = V × I C) R = V / I²
C) To neutralize the system voltage D) To supply power to remote equipment Answer: B Explanation: The GEC connects the grounding electrode to the service equipment, ensuring fault currents have a low‑impedance return path to earth. Question 10. According to NEC Article 110‑14, what is the minimum clearance in front of a panelboard for working space? A) 24 in. B) 30 in. C) 36 in. D) 42 in. Answer: C Explanation: NEC requires a minimum of 36 in. of clear working space in front of panels to allow safe operation and maintenance. Question 11. Which of the following is considered a “grounded conductor” under NEC definitions? A) Equipment grounding conductor B) Neutral conductor C) Grounding electrode D) Service‑entrance conductor Answer: B Explanation: The neutral is the grounded conductor; it is intentionally connected to earth at the service disconnect. Question 12. In a residential dwelling, the required spacing between receptacles along a wall line is:
A) No more than 3 ft apart B) No more than 6 ft apart C) No more than 9 ft apart D) No more than 12 ft apart Answer: B Explanation: NEC 210‑11(C) requires receptacles so that no point on the wall line is more than 6 ft from an outlet. Question 13. Which device provides protection against both ground‑fault and arc‑fault hazards in a bedroom? A) GFCI receptacle only B) AFCI circuit breaker only C) Combination GFCI/AFCI breaker D) Standard circuit breaker with a surge protector Answer: C Explanation: The combination GFCI/AFCI device protects against both types of hazards and is required in bedrooms per NEC 210‑30 and 210‑50. Question 14. For a 120 V, 20 A branch circuit, what is the minimum size copper conductor required per NEC Table 310‑16 (assuming 75 °C rating)? A) 12 AWG B) 10 AWG C) 8 AWG D) 14 AWG Answer: A Explanation: A 20‑A circuit requires at least 12 AWG copper when using the 75 °C column in Table 310 ‑16.
Answer: A Explanation: Article 300 covers general requirements for wiring methods, including raceway installation. Question 18. How many conductors may be placed in a standard 1‑in. × 1 ‑in. (4 in³) metal box for a single‑gang switch, assuming only one device and no internal clamps? A) 2 B) 3 C) 4 D) 5 Answer: C Explanation: Using the box‑fill calculation (each conductor = 1 unit, each device = 2 units), a 4 in³ box can accommodate up to 4 units, allowing three conductors plus the device. Question 19. Which of the following is a permissible use for a flexible metal conduit (FMC) in a residential building? A) Exposed outdoors in direct sunlight B) Within a wet location where it is subject to moisture C) As a permanent wiring method in a finished ceiling D) As a short jump‑lead between a receptacle and a lamp Answer: B Explanation: FMC is allowed in wet locations provided it is properly sealed; it is not permitted for permanent concealed runs in finished ceilings or as a jump‑lead. Question 20. The NEC requires a disconnecting means within sight of the service equipment for a detached garage. What is the maximum distance allowed? A) 25 ft B) 30 ft
C) 50 ft D) 75 ft Answer: B Explanation: NEC 230‑102 requires the disconnect to be within sight of the service equipment, defined as not more than 50 ft and visible without opening a door. However, “within sight” is interpreted as a clear line of sight, not a specific distance; the correct answer aligns with the typical interpretation of 30 ft for practical purposes. Question 21. Which NEC article addresses the requirements for grounding and bonding of electrical systems? A) Article 250 B) Article 300 C) Article 310 D) Article 340 Answer: A Explanation: Article 250 contains the rules for grounding and bonding of electrical installations. Question 22. For a three‑phase, 4‑wire wye system, what is the relationship between line voltage (V_L) and phase voltage (V_P)? A) V_L = V_P × √ B) V_L = V_P × √ C) V_L = V_P ÷ √ D) V_L = V_P × 2 Answer: B Explanation: In a wye system, line voltage equals phase voltage multiplied by √3.
Question 26. A 240 V, 30 A dryer requires a dedicated circuit. What is the minimum conduit size (type PVC) to house three #10 AWG THHN conductors? A) 1/2‑in. B) 3/4‑in. C) 1‑in. D) 1‑1/4‑in. Answer: B Explanation: PVC Schedule 40 3/4‑in. conduit can accommodate three #10 AWG THHN conductors per NEC Chapter 9 Table 1. Question 27. Which type of overcurrent protective device is required for a feeder supplying a motor that has a locked‑rotor current (LRC) of 150 A? A) Standard circuit breaker sized at 150 A B) Motor‑rated circuit breaker sized at 125 % of LRC C) Fuse sized at 200 % of LRC D) No OCPD required for motor feeders Answer: B Explanation: NEC 430‑30 requires OCPD for motors to be sized at 125 % of the LRC, so a breaker of 187.5 A (rounded to next standard size) is required. Question 28. In a commercial office building, receptacles must be installed so that the spacing between them does not exceed: A) 6 ft B) 8 ft C) 10 ft D) 12 ft
Answer: C Explanation: NEC 210‑52(C) requires receptacle spacing of not more than 10 ft in commercial spaces. Question 29. Which NEC article deals with the requirements for fire alarm circuits? A) Article 700 B) Article 720 C) Article 730 D) Article 740 Answer: A Explanation: Article 700 covers emergency systems, including fire alarm circuits. Question 30. A 15‑A GFCI receptacle is installed in a bathroom. Which of the following is true? A) It protects only the downstream wiring, not the receptacle itself B) It must be a duplex receptacle C) It provides both ground‑fault and arc‑fault protection automatically D) It must be installed on a dedicated 20‑A circuit Answer: D Explanation: NEC 210‑411 requires bathroom receptacles to be on a dedicated 20‑A branch circuit. Question 31. Which of the following is the correct method for identifying a grounded (neutral) conductor in a 120/240 V system? A) White or gray insulation B) Green insulation C) Bare copper only D) Red insulation
C) Article 720 D) Article 740 Answer: B Explanation: Article 710 contains requirements for standby and emergency power systems. Question 35. When installing a conduit system in a concrete slab, which of the following is required? A) PVC conduit only B) Rigid metal conduit (RMC) only C) Conduit must be listed for direct burial D) Conduit must be supported every 6 ft only Answer: C Explanation: Conduit in concrete must be listed for direct burial (e.g., Schedule 80 PVC or RMC) per NEC 300 ‑307. Question 36. A 120 V, 12 A lighting circuit uses 12 AWG copper conductors. What is the maximum number of such circuits that can share a single 60 A feeder without exceeding the feeder’s ampacity? A) 3 B) 4 C) 5 D) 6 Answer: B Explanation: Each circuit draws 12 A; 4 circuits × 12 A = 48 A, which is within the 60 A feeder rating. Question 37. Which of the following is NOT a permitted method for grounding a metal water pipe system?
A) Directly bonding to the grounding electrode conductor B) Using a grounding clamp at the point of entry into the building C) Connecting via a separate grounding electrode rod D) Using a listed grounding electrode conductor attached to the pipe Answer: C Explanation: Metal water piping must be bonded directly to the grounding system; a separate grounding rod does not provide the required bond. Question 38. In a hazardous (Class I, Division 2) area, which wiring method is acceptable for power circuits? A) NM‑B cable B) MC cable with aluminum conductors C) Rigid metal conduit (RMC) D) Flexible metal conduit (FMC) without fittings Answer: C Explanation: RMC provides a complete metal enclosure suitable for Class I, Division 2 hazardous locations. Question 39. Which NEC article addresses the installation of communication cables such as CAT‑5/6? A) Article 300 B) Article 800 C) Article 820 D) Article 860 Answer: B Explanation: Article 800 covers the installation of communications circuits, including data and telephone cabling.
Answer: C Explanation: NEC 210‑52(C)(3) requires receptacles to be installed at least 6 ft from the edge of a bathtub. Question 43. Which article of the NEC governs the installation of motor controllers and starters? A) Article 430 B) Article 440 C) Article 450 D) Article 460 Answer: A Explanation: Article 430 contains the requirements for motor circuits, including controllers and starters. Question 44. A conduit run is installed horizontally in a ceiling. What is the maximum spacing between supports for EMT according to NEC? A) 3 ft B) 6 ft C) 8 ft D) 10 ft Answer: B Explanation: NEC 358‑1 requires EMT to be supported at intervals not exceeding 6 ft. Question 45. Which of the following is the correct method for calculating box fill for a device box containing a single‑gang duplex receptacle with three conductors (hot, neutral, ground) and a device strap? A) 2 units for device + 3 units for conductors = 5 units B) 2 units for device + 4 units for conductors = 6 units
C) 1 unit for device + 3 units for conductors = 4 units D) 2 units for device + 2 units for conductors = 4 units Answer: A Explanation: Each conductor that terminates in the box counts as 1 unit, the equipment grounding conductor counts as 1 unit, and the device counts as 2 units. Thus, 3 conductors (hot, neutral, ground) = 3 units + device 2 units = 5 units. Question 46. Under Oregon law, who is authorized to issue a final electrical inspection certificate? A) The electrical contractor B) The building owner C) A certified electrical inspector employed by the state or local authority D) Any licensed electrician on the job site Answer: C Explanation: Only a certified electrical inspector with authority from the state or local jurisdiction can issue the final inspection certificate. Question 47. Which NEC article defines the requirements for arc‑fault circuit interrupters (AFCIs)? A) Article 210‑ 11 B) Article 210‑ 22 C) Article 210‑ 50 D) Article 210‑ 120 Answer: D Explanation: Article 210‑120 outlines the requirements for AFCI protection in dwelling unit branch circuits. Question 49. Which of the following is NOT a permitted method for disposing of shellstock waste on‑site?
Question 52. Which of the following is an acceptable method for cleaning biofouling from off‑bottom gear? A. Using high‑pressure seawater jets while the gear remains submerged B. Scrubbing with abrasive metal brushes while the gear is on land C. Burning the gear to remove organisms D. Soaking the gear in freshwater for 24 hours Answer: A Explanation: High‑pressure seawater jets are effective and comply with environmental regulations. Question 53. Which of the following best describes a “licensed Shellfish Shipper (Class A)” in New York? A. An entity that can only transport shellfish within the state B. A facility that processes shellfish into value‑added products C. A commercial carrier authorized to transport shellfish for sale to retailers or consumers D. A private individual who ships shellfish for personal use Answer: C Explanation: Class A shippers are licensed commercial carriers authorized to move shellfish for market. Question 54. Which of the following is a required component of the “annual DEC report” for a culture permit? A. A summary of all marketing contracts signed during the year B. A detailed inventory of all gear and its condition C. A list of all employees who received GMP training D. A summary of total harvest volume and any violations or closures incurred Answer: D Explanation: The annual report must summarize harvest data, closures, and any compliance issues.
Question 55. Which of the following describes the legal status of “seed” oysters that are less than the minimum size? A. They are considered “unmarketable” and must be destroyed B. They may be sold as seed provided they are properly labeled and tracked C. They can be sold only after being grown to legal size on the buyer’s farm D. They are exempt from all labeling requirements Answer: B Explanation: Seed oysters under the minimum size can be sold if tagged and labeled as seed. Question 56. What is the primary purpose of the “DEC Public Shellfish Mapper” tool? A. To provide real‑time GPS tracking of shellfish vessels B. To display the status (certified or uncertified) of shellfish harvesting areas C. To calculate the economic impact of aquaculture in New York D. To issue permits automatically based on location Answer: B Explanation: The mapper shows which waters are open or closed for shellfish harvesting. Question 57. Which of the following is a prohibited activity within a certified shellfish area without a separate permit? A. Deploying a floating raft for oyster culture B. Conducting a scientific survey using a small boat C. Dredging the seabed for sand extraction D. Installing a navigation buoy with USCG approval Answer: C
