Free practice test

Electrician Practice Test

Check what you know about the electrician job with 15 free questions and instant explanations.

Updated By the Career Education Institute Curriculum Team
About this practice test

15 multiple-choice questions on electrician knowledge, safety and vocabulary. Submit to see your score and explanations, or open any question’s answer as you go. Nothing is saved or shared.

Question 1 of 15According to Ohm’s law, voltage equals:
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Answer: Current times resistance. V = I × R.

Question 2 of 15What does a GFCI protect against?
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Answer: Ground faults that can shock people. GFCIs trip when current leaks to ground.

Question 3 of 15What is the correct sequence for verifying a circuit is dead?
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Answer: Test meter on known source, test circuit, retest meter. Live-dead-live confirms your meter works before and after testing.

Question 4 of 15Which code governs most U.S. electrical installations?
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Answer: NEC (NFPA 70). The National Electrical Code is the national standard.

Question 5 of 15Lockout/tagout is used to:
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Answer: Prevent equipment from being energized during work. LOTO isolates hazardous energy.

Question 6 of 15Which term matches this definition: “The flow of electric charge, measured in amperes.”
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Answer: Current (A). Current (A): The flow of electric charge, measured in amperes.

Question 7 of 15What does “GFCI” mean?
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Answer: Ground-fault circuit interrupter: shuts off power when it detects current leaking to ground.. GFCI: Ground-fault circuit interrupter: shuts off power when it detects current leaking to ground.

Question 8 of 15Which term matches this definition: “The National Electrical Code (NFPA 70), the standard for safe electrical installation adopted by most U.S. jurisdictions.”
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Answer: NEC. NEC: The National Electrical Code (NFPA 70), the standard for safe electrical installation adopted by most U.S. jurisdictions.

Question 9 of 15What does “Ohm’s law” mean?
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Answer: Voltage equals current times resistance (V = I × R).. Ohm’s law: Voltage equals current times resistance (V = I × R).

Question 10 of 15Which term matches this definition: “Connecting metal parts together so they stay at the same electrical potential.”
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Answer: Bonding. Bonding: Connecting metal parts together so they stay at the same electrical potential.

Question 11 of 15What does “Load calculation” mean?
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Answer: Determining the total electrical demand to size services and feeders.. Load calculation: Determining the total electrical demand to size services and feeders.

Question 12 of 15Which term matches this definition: “Connecting electrical systems to the earth to stabilize voltage and provide a fault path.”
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Answer: Grounding. Grounding: Connecting electrical systems to the earth to stabilize voltage and provide a fault path.

Question 13 of 15What does “Lockout/tagout (LOTO)” mean?
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Answer: Procedures to isolate energy sources and prevent equipment from being energized during work.. Lockout/tagout (LOTO): Procedures to isolate energy sources and prevent equipment from being energized during work.

Question 14 of 15Which term matches this definition: “A power system with three alternating currents, common in commercial and industrial settings.”
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Answer: Three-phase power. Three-phase power: A power system with three alternating currents, common in commercial and industrial settings.

Question 15 of 15What does “EMT conduit” mean?
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Answer: Electrical metallic tubing: thin-wall steel conduit that protects wires.. EMT conduit: Electrical metallic tubing: thin-wall steel conduit that protects wires.

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