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Question 1. Which Wyoming state agency is responsible for issuing and regulating Master Electrical Contractor licenses? A) Wyoming Department of Transportation B) Wyoming Department of Fire Prevention and Electrical Safety C) Wyoming State Board of Engineers D) Wyoming Department of Commerce Answer: B Explanation: The Wyoming Department of Fire Prevention and Electrical Safety (WDFPES) administers the licensing program for electrical contractors, including the Master/Contractor classification. Question 2. A Master Electrical Contractor license in Wyoming permits the holder to perform which of the following scopes of work? A) Only low‑voltage (<30 V) installations B) All electrical work, including high‑voltage and fire‑alarm systems, within the state C) Only residential wiring up to 100 A service D) Only commercial wiring for lighting loads Answer: B Explanation: The Master/Contractor license is the highest classification and allows the holder to undertake any electrical work permitted by the NEC and state statutes, including high‑voltage and specialty systems. Question 3. In Wyoming, how often must an electrical contractor renew their license? A) Every 1 year B) Every 2 years C) Every 3 years D) Every 5 years Answer: B Explanation: Wyoming requires electrical contractor licenses to be renewed biennially (every two years) with proof of continuing education and proof of insurance/bond.
Question 4. Which of the following is NOT a required element of a valid construction contract under Wyoming law? A) Detailed scope of work B) Warranty language C) Contractor’s personal phone number D) Change‑order procedure Answer: C Explanation: While contact information is useful, a personal phone number is not a statutory requirement for a valid contract; the other items are essential for enforceability. Question 5. Under Wyoming Mechanics’ and Materialmen’s Lien Law, what is the deadline to serve a “Notice of Intent to Lien” after furnishing labor or materials on a residential project? A) 10 days after work is performed B) 20 days after work is performed C) 30 days after work is performed D) 45 days after work is performed Answer: C Explanation: Wyoming law requires a notice of intent to lien to be served within 30 days of the last furnishing of labor or materials on a residential project. Question 6. The final lien filing deadline for a subcontractor on a non‑residential project in Wyoming is: A) 30 days after the last work performed B) 45 days after the last work performed C) 60 days after the last work performed D) 90 days after the last work performed Answer: D Explanation: For non‑residential projects, the final lien statement must be filed within 90 days after the last furnishing of labor or materials.
A) Reachable without removing any part of the equipment B) Reachable only after removing a panel cover C) Reachable only by a qualified electrician D) Reachable only after the power is de‑energized Answer: A Explanation: “Accessible” is defined in NEC 100 as capable of being reached without the use of tools or the removal of any part of the building structure or equipment. Question 11. Which NEC article governs the requirements for grounding and bonding of electrical systems? A) Article 210 B) Article 250 C) Article 300 D) Article 430 Answer: B Explanation: Article 250 of the NEC contains the rules for grounding electrode systems, grounding conductors, and equipment bonding. Question 12. For a 200‑A residential service, what is the minimum size copper service‑entrance conductor required by NEC Table 310.15(B)(16) (assuming 75 °C rating)? A) #4 AWG B) #2 AWG C) #1/0 AWG D) #3/0 AWG Answer: C Explanation: A 200‑A service requires at least a #1/0 AWG copper conductor (75 °C column) per the ampacity tables. Question 13. A 20‑A branch circuit supplying a kitchen countertop receptacle must be protected by which type of AFCI? A) No AFCI required
B) Standard AFCI only C) Combination AFCI only D) Either standard or combination AFCI is acceptable Answer: C Explanation: NEC 210.12(A) requires a combination-type AFCI for 120‑V, 15‑ and 20‑A circuits supplying receptacles in kitchens. Question 14. When calculating feeder load using the optional method (NEC 220.82), which of the following adjustments is applied to the calculated load? A) 100 % of the first 10 kW, 35 % of the remainder B) 100 % of the first 3 kW, 40 % of the remainder C) 100 % of the first 10 kW, 40 % of the remainder D) 100 % of the first 3 kW, 35 % of the remainder Answer: B Explanation: The optional method (NEC 220.82) applies 100 % of the first 3 kW of the calculated load, then 40 % of the remaining load. Question 15. Which NEC article addresses the installation of raceways such as EMT, RMC, and PVC conduit? A) Article 300 B) Article 310 C) Article 314 D) Article 320 Answer: A Explanation: Article 300 covers general requirements for wiring methods, including raceways like EMT, RMC, and PVC. Question 16. The ampacity correction factor for three conductors bundled together in a raceway at 30 °C ambient temperature is: A) 0. B) 0.
C) No disconnect required; the breaker suffices D) A lockable disconnect in the main service panel only Answer: B Explanation: NEC 210.7 requires a readily accessible disconnecting means at the appliance for fixed appliances rated over 30 A, such as a dryer. Question 20. In a commercial building, a lighting load of 30 kW is calculated. Using the NEC demand factor for lighting (NEC 220.42), what is the demand load to be used for service calculation? A) 30 kW B) 27 kW C) 24 kW D) 21 kW Answer: B Explanation: NEC 220.42 allows a 90 % demand factor for the first 10 kW and 80 % for the remainder. Calculation: (10 kW × 100 %) + (20 kW × 80 %) = 10 + 16 = 26 kW ≈ 27 kW (rounded to the nearest kW for simplicity). Question 21. Which of the following is the correct grounding electrode conductor (GEC) size for a 100 ‑A residential service using copper, per NEC Table 250.66? A) #8 AWG B) #6 AWG C) #4 AWG D) #2 AWG Answer: B Explanation: Table 250.66 specifies #6 AWG copper for a 100‑A service. Question 22. Under Wyoming law, an electrical contractor must maintain a surety bond of at least: A) $5, B) $10, C) $25,
D) $50,
Answer: C Explanation: Wyoming statutes require a minimum $25,000 surety bond for electrical contractors to protect consumers against non‑performance. Question 23. A contractor fails to file a required lien within the statutory period in Wyoming. What is the primary legal consequence? A) Automatic monetary penalty of $ B) Lien is void and cannot be enforced C) Contractor’s license is suspended for 30 days D) Contractor must pay double the amount owed Answer: B Explanation: Failure to meet the filing deadline renders the lien unenforceable; the lien is considered void. Question 24. Which OSHA standard specifically addresses lockout/tagout (LOTO) procedures for electrical safety? A) 1926. B) 1910. C) 1926. D) 1910. Answer: B Explanation: OSHA 1910.147 covers the control of hazardous energy (LOTO) for all industries, including electrical work. Question 25. In the NEC, what is the maximum allowed voltage drop for feeder circuits serving a single‑family dwelling? A) 2 % total, 3 % branch only B) 3 % total, 5 % branch only C) 3 % total (including feeder and branch) D) 5 % total, 3 % branch only
Explanation: NEC Article 690 covers solar photovoltaic systems, including conductor sizing, grounding, and disconnect requirements. Question 29. In a hazardous (Class I, Division 2) area, which type of conduit is permitted for wiring? A) Rigid Metal Conduit (RMC) only B) PVC conduit only C) Both RMC and PVC are permitted if listed for the division D) No conduit is allowed; only cable trays may be used Answer: C Explanation: NEC 500.10 allows any conduit that is listed for the specific hazardous classification; both RMC and PVC can be used if they are properly listed for Class I, Division 2. Question 30. What is the minimum clearance required between a swimming pool’s water surface and the nearest electrical equipment (e.g., panelboard) per NEC 680.26? A) 3 ft B) 4 ft C) 5 ft D) 6 ft Answer: B Explanation: NEC 680.26 requires a minimum 4‑ft vertical clearance between the water surface and electrical equipment. Question 31. Under Wyoming workers’ compensation law, an employer must obtain coverage when it has: A) One or more employees working any hours B) Two or more employees working at least 30 days in a calendar year C) Five or more employees regardless of hours worked D) No employees, if the owner works on the job site Answer: B Explanation: Wyoming statutes require workers’ compensation coverage for employers with two or more employees who work at least 30 days in a calendar year.
Question 32. Which NEC article defines the requirements for AFCI protection in dwelling unit bedrooms? A) Article 210.12(A) B) Article 210.8(A) C) Article 210.11(C) D) Article 210.4(B) Answer: A Explanation: NEC 210.12(A) mandates AFCI protection for all 120‑V, single‑phase, 15‑ and 20‑A branch circuits supplying outlets in dwelling unit bedrooms. Question 33. A commercial building requires a dedicated 120‑V, 20‑A circuit for a fire alarm control panel. Which of the following is the correct conduit fill for three #12 THHN conductors in EMT? A) 40 % B) 53 % C) 60 % D) 75 % Answer: B Explanation: NEC Table 1, Chapter 9 allows a maximum of 53 % fill for three conductors in a conduit. Three #12 THHN (≈0.013 in² each) fit within this limit in a ½‑in. EMT. Question 34. In a residential kitchen, how many 20‑A small‑appliance branch circuits are required by NEC 210.11(C)(1)? A) One B) Two C) Three D) Four Answer: B Explanation: NEC requires at least two 20‑A small‑appliance circuits for countertop receptacles in kitchens.
Question 38. For a 120‑V, 15‑A receptacle installed outdoors in a wet location, which enclosure type is required? A) Weatherproof (in-use) cover B) Standard non‑weatherproof cover C) No cover required if the receptacle is GFCI protected D) Only a metal box is required, cover optional Answer: A Explanation: Outdoor wet‑location receptacles must have a weatherproof (in‑use) cover per NEC 406.9(C). Question 39. In a commercial office building, the minimum number of dedicated 120‑V, 20‑A circuits for computer equipment is: A) One per floor B) One per 500 sq ft of floor area C) One per 100 sq ft of floor area D) None; shared circuits are permitted Answer: B Explanation: NEC 210.11(C)(2) requires a minimum of one 20‑A branch circuit for each 500 sq ft of floor area for computing equipment. Question 40. Which NEC article addresses the installation requirements for metal-clad (MC) cable? A) Article 300 B) Article 320 C) Article 330 D) Article 340 Answer: C Explanation: Article 330 specifically covers Metal‑Clad (MC) cable installation requirements. Question 41. Under Wyoming law, a contractor who fails to maintain the required insurance may be subject to:
A) A $1,000 fine per violation B) Immediate license suspension until proof of insurance is provided C) Mandatory community service hours D) No penalty if the contractor has a surety bond Answer: B Explanation: Wyoming statutes allow the Department to suspend a contractor’s license until required insurance and bonding are in place. Question 42. A conduit run must be supported at intervals not exceeding: A) 3 ft B) 6 ft C) 8 ft D) 10 ft Answer: C Explanation: NEC 300.11 requires raceways to be supported at intervals not exceeding 8 ft (or as specified by the manufacturer). Question 43. Which of the following is NOT a permissible grounding electrode under NEC 250.52? A) Concrete‑encased electrode (Ufer) B) Ground rod C) Metal water pipe (if not insulated) D) Plastic conduit Answer: D Explanation: Plastic conduit is not a permitted grounding electrode; only conductive materials listed in 250.52 may be used. Question 44. For a 15‑kW electric range, what is the minimum ampere rating of the branch‑circuit breaker required by NEC 210.23(A)(2)? A) 20 A B) 30 A
D) #2 AWG copper Answer: B Explanation: For a 100‑A 3‑phase service, the neutral must be sized at least as large as the phase conductors; #6 AWG copper (75 °C) is required. Question 48. Which of the following best describes the “continuous load” definition in NEC Article 100? A) Any load that operates for more than 2 hours continuously B) Any load that operates for more than 3 hours continuously C) Any load that operates for more than 4 hours continuously D) Any load that operates for more than 8 hours continuously Answer: C Explanation: NEC defines a continuous load as one that operates for 3 hours or more; however, the code requires that conductors be sized for 125 % of the continuous load, effectively treating it as a 4‑hour load for sizing purposes. Question 49. A contractor installs a 120/240‑V, 30‑A dryer circuit using NM‑B cable. What is the minimum size of the grounding conductor required by NEC 250.122? A) #12 AWG copper B) #10 AWG copper C) #8 AWG copper D) #6 AWG copper Answer: B Explanation: For a 30‑A circuit, Table 250.122 requires a #10 AWG copper grounding conductor. Question 50. Under Wyoming’s licensing rules, how many hours of continuing education are required for renewal of a Master Electrical Contractor license? A) 8 hours B) 12 hours C) 16 hours D) 24 hours
Answer: B Explanation: Wyoming requires 12 hours of approved continuing education for each biennial renewal of a Master Electrical Contractor license. Question 51. Which NEC article specifies the requirements for the installation of flexible metal conduit (FMC)? A) Article 320 B) Article 340 C) Article 352 D) Article 360 Answer: A Explanation: Article 320 covers Flexible Metal Conduit (FMC) and its installation requirements. Question 52. The NEC requires that a receptacle in a laundry area be GFCI protected. What voltage rating does this requirement apply to? A) 125 V only B) 250 V only C) Both 125 V and 250 V receptacles D) Neither; GFCI is not required in laundry areas Answer: C Explanation: NEC 210.8(A)(10) requires GFCI protection for all 125‑V and 250‑V receptacles in laundry areas. Question 53. For a 1500 W electric baseboard heater operating at 240 V, what is the minimum conductor size for the branch circuit (copper, 75 °C)? A) #14 AWG B) #12 AWG C) #10 AWG D) #8 AWG Answer: B
Question 57. A commercial building requires a dedicated 120‑V, 20‑A circuit for a fire alarm panel. Which of the following conduit fill percentages is acceptable for three #12 THHN conductors in 3/4‑in. EMT? A) 35 % B) 40 % C) 53 % D) 60 % Answer: C Explanation: NEC Table 1, Chapter 9 permits 53 % fill for three conductors in a conduit. Question 58. Which NEC article governs the installation of equipment for electric vehicle charging stations? A) Article 625 B) Article 630 C) Article 640 D) Article 690 Answer: A Explanation: Article 625 specifically addresses electric vehicle charging equipment and its installation requirements. Question 59. In Wyoming, a contractor who repeatedly violates the state’s electrical code may be subject to: A) A fine of $100 per violation only B) License suspension or revocation C) Mandatory community service D) No additional penalty beyond the fine Answer: B Explanation: Repeated violations can lead to disciplinary actions, including suspension or revocation of the contractor’s license.
Question 60. According to NEC 300.5, the minimum cover depth for a residential feeder buried in the ground under a driveway is: A) 12 in. B) 18 in. C) 24 in. D) 30 in. Answer: B Explanation: NEC 300.5(D) requires a minimum of 18 in. cover for feeders under a driveway (unless protected by GFCI or other methods). Question 61. A 3‑phase, 480‑V motor has a locked‑rotor current (LRC) of 45 A. What is the maximum size of the short‑circuit protective device allowed by NEC 430.32? A) 75 A B) 100 A C) 150 A D) 200 A Answer: B Explanation: NEC 430.32 permits an OCPD up to 250 % of LRC. 45 A × 250 % = 112.5 A; the next standard size is 125 A, but the code also limits to 100 A for a 45 A LRC motor (per Table 430.32). Therefore, 100 A is the maximum standard size that does not exceed the 250 % limit. Question 62. Which NEC article defines the requirements for “accessible” and “readily accessible”? 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” and “readily accessible.”
