Download PrepIQ Wyoming WY 385 Journeyman Electrician Ultimate Exam and more Exams Technology in PDF only on Docsity!
Journeyman Electrician Ultimate
Exam
Question 1. Which equation correctly represents Ohm’s Law? A) P = V × I B) V = I ÷ R C) V = I × R D) I = V + R Answer: C Explanation: Ohm’s Law states that voltage equals current multiplied by resistance (V = I × R). Question 2. In a purely resistive series circuit, the total resistance is: A) The sum of individual resistances B) The product of individual resistances C) The highest individual resistance D) The average of individual resistances Answer: A Explanation: Series resistances add directly: R_total = R1 + R2 + … Question 3. Which NEC Article defines the terms “grounded conductor” and “grounding electrode”? A) Article 100 B) Article 210 C) Article 250 D) Article 310 Answer: A Explanation: Article 100 provides definitions for terminology used throughout the NEC. Question 4. The proper PPE for an electrician working on a live 208-V panel includes: A) Hard hat only B) Safety glasses, insulated gloves, flame-resistant clothing
Journeyman Electrician Ultimate
Exam
C) Ear plugs and steel-toe boots D) None, because the panel is low voltage Answer: B Explanation: OSHA and NFPA 70E require eye protection, insulated gloves, and FR clothing for live work. Question 5. The lockout/tagout (LOTO) procedure is required by which regulation? A) NEC Article 300 B) OSHA 29 CFR 1910. C) NFPA 70E Section 130 D) Utah State Electrical Code Answer: B Explanation: OSHA standard 29 CFR 1910.147 governs LOTO to protect workers from hazardous energy. Question 6. When using a multimeter to measure voltage on a 120-V circuit, the meter should be set to: A) Resistance (Ω) B) Current (A) C) AC voltage (V ~) D) DC voltage (V –) Answer: C Explanation: Residential circuits are AC, so the multimeter must be set to AC voltage. Question 7. The maximum number of service disconnects allowed at a single location per the “Six-Disconnect Rule” is: A) 4 B) 6 C) 8 D) Unlimited if labeled
Journeyman Electrician Ultimate
Exam
Explanation: NEC Table 250.66 specifies #6 AWG copper for a 200-A grounding electrode conductor. Question 11. In a residential kitchen, the demand factor applied to the first 10 kW of cooking equipment is: A) 100 % B) 80 % C) 65 % D) 50 % Answer: C Explanation: NEC Table 220.55 permits a 65 % demand factor for the first 10 kW of cooking appliances. Question 12. The general lighting load for a commercial office space is calculated as: A) 3 VA per ft² B) 5 VA per ft² C) 10 VA per ft² D) 15 VA per ft² Answer: B Explanation: NEC Article 220.12 uses 5 VA per square foot for general lighting in commercial spaces. Question 13. When more than three current-carrying conductors are in a conduit, the ampacity must be derated to: A) 90 % B) 80 % C) 70 % D) 60 % Answer: B Explanation: NEC Table 310.15(B)(3)(a) requires a 80 % derating factor for 4– conductors.
Journeyman Electrician Ultimate
Exam
Question 14. A voltage drop of no more than what percentage is recommended for branch circuits supplying sensitive electronic equipment? A) 1 % B) 2 % C) 3 % D) 5 % Answer: B Explanation: The NEC recommends keeping voltage drop ≤ 2 % for branch circuits to maintain equipment performance. Question 15. Which device provides protection against both ground-fault and arc-fault conditions in a dwelling? A) GFCI receptacle only B) AFCI breaker only C) Combination GFCI-AFCI breaker D) Standard circuit breaker Answer: C Explanation: A combination GFCI-AFCI breaker protects against both fault types. Question 16. The correct conduit fill for three #12 AWG THHN conductors in EMT (schedule 40) is: A) 15 % B) 20 % C) 25 % D) 40 % Answer: B Explanation: For more than two conductors, the maximum fill is 40 % of conduit cross-section; #12 THHN in EMT results in 20 % fill. Question 17. Which type of cable is permitted for interior residential wiring in walls and ceilings? A) Type UF
Journeyman Electrician Ultimate
Exam
D) NEC Table 210.21(B)(2) Answer: A Explanation: Table 314.16(C) provides dimensions for pull boxes based on conductor size. Question 21. A motor’s full-load current (FLC) is 20 A. The branch-circuit conductor must be sized for at least: A) 20 A B) 25 A C) 30 A D) 35 A Answer: C Explanation: Conductors must be sized at 125 % of motor FLC: 20 A × 1.25 = 25 A; the next standard size is 30 A. Question 22. Which overcurrent device is appropriate for protecting a 5-hp, 230 - V, three-phase motor? A) 30-A fuse B) 40-A circuit breaker C) 50-A breaker with inverse-time characteristic D) 60-A non-time-delay breaker Answer: C Explanation: Motors require inverse-time (thermal-magnetic) protection sized per NEC Table 430.52. Question 23. The grounding conductor for a separately derived system must be: A) Connected only at the source B) Connected at both source and service equipment C) Never connected to the neutral D) Connected to the equipment grounding conductor only Answer: B
Journeyman Electrician Ultimate
Exam
Explanation: Separately derived systems require grounding at both the source and the service equipment to ensure a low-impedance fault path. Question 24. A 240-V, 30-A receptacle in a commercial kitchen must be installed at a maximum height of: A) 4 ft 0 in B) 4 ft 6 in C) 5 ft 0 in D) 6 ft 0 in Answer: B Explanation: NEC 210.52(C)(2) limits countertop receptacle height to 4 ft 6 in above the floor. Question 25. Which of the following appliances requires a dedicated 30-A branch circuit? A) Dishwasher B) Garbage disposal C – Electric dryer D) Microwave oven Answer: C Explanation: Electric dryers are required to have a dedicated 30-A circuit per NEC 210.23(A)(2). Question 26. For a hazardous location classified as Class I, Division 2, the wiring method must be: A) Ex d (explosion-proof) only B) Intrinsically safe only C) Both Ex d and intrinsically safe are acceptable D) Standard NM cable is permitted Answer: C Explanation: Class I, Div 2 permits either explosion-proof (Ex d) or intrinsically safe equipment, per NEC 500.10.
Journeyman Electrician Ultimate
Exam
Question 30. For a pool pump motor rated 1.5 HP, 240 V, the minimum conduit size for three #10 THHN conductors is: A) ½-in. EMT B) ¾-in. EMT C) 1-in. EMT D) 1-½-in. EMT Answer: B Explanation: Using Table 314.16, three #10 THHN in EMT require at least ¾-in. conduit to stay within 40 % fill. Question 31. Which NEC article governs the installation of swimming pools and related equipment? A) Article 300 B) Article 680 C) Article 690 D) Article 710 Answer: B Explanation: Article 680 covers swimming pools, spas, and hot tubs. Question 32. In Wyoming, the electrical license renewal cycle is: A) Every 1 year B) Every 2 years C) Every 3 years D) Every 5 years Answer: B Explanation: Wyoming State law requires journeyman electricians to renew their license biennially. Question 33. The maximum number of apprentices a journeyman may supervise on a residential job in Wyoming is: A) 1 B) 2
Journeyman Electrician Ultimate
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C) 3
D) 4
Answer: C Explanation: Wyoming regulations limit supervision to three apprentices per journeyman on residential projects. Question 34. When a conduit run passes through a fire-rated wall, the conduit must be: A) Sealed with fire-stop mortar B) Left open; fire rating is not affected C) Wrapped with aluminum foil D) Only PVC conduit may be used Answer: A Explanation: NEC 300.21 requires fire-stop sealing of penetrations through fire-rated assemblies. Question 35. The minimum size of a grounding electrode conductor for a 400 - A service fed by a 4/0 AWG aluminum service entrance conductor is: A) #6 AWG copper B) #4 AWG copper C) #2 AWG copper D) #1/0 AWG copper Answer: C Explanation: NEC Table 250.66 shows #2 AWG copper for a 400-A service. Question 36. Which type of conduit is allowed for direct burial without a protective raceway? A) EMT B) RMC C) PVC (Schedule 40) D) Flexible metal conduit (FMC) Answer: C
Journeyman Electrician Ultimate
Exam
Question 40. When a conduit contains both power and communication cables, the conduit must be: A) Filled only to 30 % B) Labeled with “POWER & COMMUNICATION” C) Separated by an inner partition D) Not allowed; must be separate conduits Answer: D Explanation: NEC 800.151 prohibits mixing power and communications conductors in the same raceway. Question 41. The minimum clearance between a non-flammable panelboard and a combustible wall is: A) 3 in. B) 6 in. C) 12 in. D) 18 in. Answer: B Explanation: NEC 110.26 requires a 6-in. clearance for non-flammable equipment from combustible surfaces. Question 42. A transformer secondary overcurrent protection must be sized at what percentage of the transformer’s rated secondary current? A) 80 % B) 100 % C) 125 % D) 150 % Answer: C Explanation: NEC 450.3(B) requires overcurrent protection not less than 125 % of the transformer’s secondary rating. Question 43. For a 120-V receptacle installed in a damp location, the enclosure must be:
Journeyman Electrician Ultimate
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A) Weather-proof (NEMA 3R) B) Indoor rated only C) Explosion-proof (Ex d) D) Non-metallic only Answer: A Explanation: NEC 406.9 requires receptacles in damp locations to be in weather-proof enclosures. Question 44. The required size of a conduit body (LB) for three #8 AWG THHN conductors is: A) 1-in. B) 1-½-in. C) 2-in. D) 2-½-in. Answer: B Explanation: Using conduit fill tables, a 1-½-in. conduit body accommodates three #8 AWG THHN within 40 % fill. Question 45. The NEC permits the use of aluminum conductors for feeder circuits if the terminations are: A) Made of copper only B) Rated for aluminum or have an anti-oxidant compound C) Uncoated steel D) Any metal, no restrictions Answer: B Explanation: Aluminum conductors require terminals rated for aluminum or the use of an anti-oxidant compound (AL-C) per NEC 110.14(C). Question 46. In a commercial building, the minimum number of lighting outlets required per 100 ft² of floor area is: A) 1 B) 2
Journeyman Electrician Ultimate
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Answer: D Explanation: NEC 430.102 requires the disconnect to be either within sight or marked for remote location. Question 50. For a 125-V, 20-A circuit feeding a commercial kitchen, the required conductor size (copper, 75 °C) is: A) #14 AWG B) #12 AWG C) #10 AWG D) #8 AWG Answer: B Explanation: #12 AWG copper is rated for 20 A at 75 °C per Table 310.15(B)(16). Question 51. The NEC permits the use of a 3-wire (hot-hot-neutral) feeder to supply a 240-V, 30-A circuit without a ground conductor if: A) The circuit is in a residential dwelling only B) A grounding electrode system is present at the load C) The feeder is installed in conduit D) This is never permitted Answer: D Explanation: All circuits must have an equipment grounding conductor; a 3-wire feeder without a ground is not allowed. Question 52. Which type of grounding electrode is considered a “supplemental” electrode? A) Ufer ground B) Grounding rod C) Metal water pipe D) All of the above Answer: B Explanation: Grounding rods are supplemental electrodes; the primary electrode is usually the concrete-encased electrode (Ufer).
Journeyman Electrician Ultimate
Exam
Question 53. The required spacing for receptacles in a hallway longer than 10 ft is: A) Every 6 ft B) Every 8 ft C) Every 10 ft D) Only at each end of the hallway Answer: C Explanation: NEC 210.52(A)(1) requires receptacles to be installed so that no point is more than 6 ft from a receptacle, effectively spacing them ≤ 10 ft apart. Question 54. In a Class II, Division 1 hazardous location, the wiring method must be: A) Ex d (explosion-proof) only B) Intrinsically safe only C) Both Ex d and intrinsically safe are allowed D) Standard NM cable is acceptable Answer: C Explanation: Class II, Div 1 permits either explosion-proof (Ex d) or intrinsically safe equipment. Question 55. A 20-A GFCI circuit breaker installed in a panel must protect which of the following downstream outlets? A) Only the first receptacle downstream B) All receptacles on that branch circuit C) Only receptacles within 10 ft of the breaker D) None; GFCI protection must be at the receptacle Answer: B Explanation: A GFCI breaker provides protection for all downstream devices on that circuit. Question 56. The NEC definition of “equipment grounding conductor” excludes which of the following?
Journeyman Electrician Ultimate
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C) PVC (Schedule 40) D) All of the above Answer: D Explanation: All listed conduit types are rated for wet locations when installed per NEC requirements. Question 60. The required minimum size of a grounding electrode conductor for a 150-A service using copper is: A) #10 AWG B) #8 AWG C) #6 AWG D) #4 AWG Answer: B Explanation: Table 250.66 lists #8 AWG copper for a 150-A service. Question 61. A conduit fill calculation for a single 1-in. EMT containing five #6 AWG THHN conductors results in a fill percentage of approximately: A) 25 % B) 35 % C) 45 % D) 55 % Answer: B Explanation: Using Table 1 and Table 5, five #6 THHN occupy about 35 % of a 1 - in. EMT’s cross-section. Question 62. The NEC permits the use of “dual-rated” breakers for both AFCI and GFCI protection. These breakers are identified by: A) A double-line symbol B) The letters “AFCI/GFCI” on the device C) A green label only D) No special marking required Answer: B
Journeyman Electrician Ultimate
Exam
Explanation: Dual-rated breakers are labeled with both AFCI and GFCI designations. Question 63. The NEC requires that a receptacle installed in a laundry area be GFCI protected. The required amperage rating for this receptacle is: A) 15 A B) 20 A C) 30 A D) 40 A Answer: B Explanation: NEC 210.8(A)(7) mandates GFCI protection for laundry receptacles, which are typically 20-A. Question 64. Which of the following is a permissible method for supporting non-metallic sheathed cable (NM) in a residential attic? A) Stapled every 4 in. B) Supported every 4 ft and within 12 in. of boxes C) Hanging from the ceiling only D) No support required if the cable is in a conduit Answer: B Explanation: NEC 334.30 requires NM cable to be supported at intervals not exceeding 4 ft and within 12 in. of boxes. Question 65. The minimum size of a conduit (PVC Schedule 40) needed to pull three #4 AWG THHN conductors is: A) ½-in. B) ¾-in. C) 1-in. D) 1-½-in. Answer: B Explanation: Table 4 indicates that three #4 THHN can be accommodated in ¾-in. PVC while staying under 40 % fill.
