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Washington Journeyman Electrical Practice Exam

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The Washington State Journeyman Electrician exam is one of the most challenging in the country, requiring 8,000 verified hours of supervised electrical work and 96 hours of classroom instruction before you’re even eligible. Candidates with military training or out-of-state licenses may also qualify, provided they meet Washington’s work-hour and documentation requirements. Passing the exam earns your state-issued Journeyman Electrician Certificate, an essential step for advancing your electrical career.

The exam is divided into two parts: 60 questions on the National Electrical Code® (NEC) and electrical theory (3 hours) and 17 questions on Washington State laws and rules (1 hour). To succeed, you must score at least 70% overall. Expect questions on grounding, wiring methods, conductor sizing, overcurrent protection, motors, special occupancies, and local RCW 19.28 and WAC 296-46B requirements. Because the test combines national code with Washington-specific regulations, being able to navigate both references quickly is key.

Dakota Prep gives you the edge with practice exams built for the Washington journeyman test, including 3,000+ NEC-aligned practice questions. Learn to navigate the 2020 NEC efficiently, master Washington’s laws, and sharpen your calculation skills under timed conditions. Start today with a free Washington journeyman electrician practice exam and build the confidence to pass on your first attempt.

A line voltage switch is required to be added to equipment installed in a car wash. The switch needs to be installed in a __________ enclosure.

The correct answer is  

NEC 2017: Table 110.28NEC 2020: Table 110.28NEC 2023: Table 110.28

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NEC 2017: Table 110.28NEC 2020: Table 110.28NEC 2023: Table 110.28

A voltmeter is rated to read 3 V with a 300 Ohm resistor in it. The size of resistor to put in series that would be required for the meter to read 150 V is__________

The correct answer is  

Step 1: For a 150-volt range, the same 0.01 amps must flow.150 volts divided by 0.01 amps = 15,000 ohms total resistance required.

Step 2: The meter already has 300 ohms inside it.So the extra series resistor needed is 15,000 minus 300 = 14,700 ohms.

Answer: 14.7 kilo-ohms in series.

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Step 1: For a 150-volt range, the same 0.01 amps must flow.150 volts divided by 0.01 amps = 15,000 ohms total resistance required.

Step 2: The meter already has 300 ohms inside it.So the extra series resistor needed is 15,000 minus 300 = 14,700 ohms.

Answer: 14.7 kilo-ohms in series.

A 20 hp, 208-volt, three-phase, Design B motor in a woodworking shop frequently trips its time-delay (dual-element) fuse during startup. The maximum permitted fuse rating to resolve this issue is _____ amperes.

The correct answer is  

NEC 2017: Table 430.250, 430.52(C)(1), 430.52(C)(1)(a)(2), 240.6NEC 2020: Table 430.250, 430.52(C)(1), 430.52(C)(1)(a)(2), 240.6NEC 2023: Table 430.250, 430.52(C)(1), 430.52(C)(1)(a)(2), 240.6Step 1: Find the FLC for a 20 hp, 208-volt, three-phase Design B motor in Table 430.250. The FLC is 59.4 amperes. Step 2: Calculate 225% of FLC: 59.4 × 225% = 133.65 amperes. Step 3: The next lower standard fuse size is 125 amperes, which doesn't exceed 225% of FLC. Step 4: Therefore, the maximum permitted fuse rating is 125 amperes.

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NEC 2017: Table 430.250, 430.52(C)(1), 430.52(C)(1)(a)(2), 240.6NEC 2020: Table 430.250, 430.52(C)(1), 430.52(C)(1)(a)(2), 240.6NEC 2023: Table 430.250, 430.52(C)(1), 430.52(C)(1)(a)(2), 240.6Step 1: Find the FLC for a 20 hp, 208-volt, three-phase Design B motor in Table 430.250. The FLC is 59.4 amperes. Step 2: Calculate 225% of FLC: 59.4 × 225% = 133.65 amperes. Step 3: The next lower standard fuse size is 125 amperes, which doesn't exceed 225% of FLC. Step 4: Therefore, the maximum permitted fuse rating is 125 amperes.

What is the minimum size requirement for a copper concrete encased grounding electrode conductor connected to the concrete-encased building steel used as the grounding electrode system, if an AC service is supplied with four (4) parallel sets of size 500 kcmil aluminum conductors, and the grounding electrode conductor doesn't connect to another type of electrode that requires a larger size conductor?

The correct answer is  

NEC 2017: Table 250.66, 250.66(B)

NEC 2020: Table 250.66, 250.66(B)

NEC 2023: Table 250.66, 250.66(B)

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NEC 2017: Table 250.66, 250.66(B)

NEC 2020: Table 250.66, 250.66(B)

NEC 2023: Table 250.66, 250.66(B)

What is the minimum size of copper SE cable with Type THHW insulation that can be used as ungrounded (phase) service-entrance conductors for a 150-ampere rated, 120/240-volt, single-phase residential service?

The correct answer is  

NEC 2017: 310.15(B)(7), Table 310.15(B)(16), Annex D Example D7NEC 2020: 310.12(A), Table 310.12NEC 2023: 310.12(A), Table 310.12

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NEC 2017: 310.15(B)(7), Table 310.15(B)(16), Annex D Example D7NEC 2020: 310.12(A), Table 310.12NEC 2023: 310.12(A), Table 310.12

What is the minimum number of single or duplex receptacles required for a patient bed location in a critical care (Category 1) space in a healthcare facility?

The correct answer is  

NEC 2017: 517.19(B)(1) and (2)NEC 2020: 517.19(B)(1) and (2)NEC 2023: 517.19(B)(1) and (2)

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NEC 2017: 517.19(B)(1) and (2)NEC 2020: 517.19(B)(1) and (2)NEC 2023: 517.19(B)(1) and (2)

Which of the following areas in a dwelling are required to have all 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets or devices protected by a listed arc-fault circuit interrupter (AFCI)?

The correct answer is  

NEC 2017: 210.12(A)NEC 2020: 210.12(A)NEC 2023: 210.12(A)

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NEC 2017: 210.12(A)NEC 2020: 210.12(A)NEC 2023: 210.12(A)

When troubleshooting a live 600 A, 347/600 V, 3Ø electrical panel, a minimum working space of __________ is required.

The correct answer is  

NEC 2017: Table 110.26(A)(1), Condition 2NEC 2020: Table 110.26(A)(1), Condition 2NEC 2023: Table 110.26(A)(1), Condition 2

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NEC 2017: Table 110.26(A)(1), Condition 2NEC 2020: Table 110.26(A)(1), Condition 2NEC 2023: Table 110.26(A)(1), Condition 2

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