Electrician Practice Tests

Electrical Practice Tests

Free electrical theory practice tests — DC machines, transformers, induction & synchronous motors, batteries, ohm’s law, breakers, fuses, and protective relays.

15tests·126questions·Free · No signup·NEC 2023
Difficulty:
Recommended
Wiring MethodsBranch CircuitsMotors

DC Generator theory

Intermediate

Free online quiz on DC Generator theory which includes losses of dc generator, construction, types and operation of DC Generator.

10Q15 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

Transformer Practice Quiz Test-1

Intermediate

Free Online Quiz test transformer theory and practice.

10Q15 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

Battery Theory Quiz Test-1

Intermediate

Free online Quiz Test battery Theory includes led acid cell, primary cell an secondary cell etc.

2Q10 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

Power system load calculations

Intermediate

online electrical practice test on power system load calculations-1

1Q10 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

Induction Motor Practice Quiz Questions

Intermediate

Free online Electrician Practice Test Questions on Induction Motor Theory Quiz

9Q14 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

DC Series Motor Practice Test Questions

Intermediate

Free online Electrical Practice Tests : DC Series Motor

10Q15 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

DC Shunt Motor Practice Test Questions

Intermediate

Electrical Practice Tests: DC Shunt Motor

9Q14 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

synchronous Generator Objective Questions

Intermediate

Free Online Practice quiz test on Synchronous Generator objective questions

12Q18 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

circuit breaker theory quiz question and answers

Intermediate

Free online quiz practice test on circuit breaker

14Q21 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

Protective Relay Objective Questions Quiz

Intermediate

Free online quiz Protective Relay Objective Quesions

9Q14 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

Resistor Practice Quiz Questions

Intermediate

Free Online Resistor Quiz Questions

12Q18 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

Transformer Calculations NEC code Questions

Intermediate

Free Online Practice Test on Transformer Calculations

6Q10 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

Electrical fuse Practice test

Intermediate

Free Practice test Electrical fuse Question and answers

10Q15 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

circuit breaker quiz questions-2

Intermediate

Take free practice test circuit breaker quiz questions

1Q10 min70%pass
Start Test
Wiring MethodsBranch CircuitsMotors

ohms law practice test questions-1

Intermediate

Take a Practice test on Ohms law Practice quiz questions - 1

11Q17 min70%pass
Start Test

Study Guides

Written guides for the topics covered in these tests — read first, then test yourself.

Ohm’s Law Refresher

V = IR — and the Power triangle. Worked examples for both AC and DC.

Transformer Basics

Turns ratio, voltage transformation, and kVA calculations.

Motor Theory

DC vs AC, induction vs synchronous, and starting methods.

About Electrical Practice Tests

Electrical theory is the foundation under every NEC code rule. These tests cover the DC and AC fundamentals you’ll see on journeyman, master, and supplemental exams:

  • DC generators and motors (series, shunt, compound)
  • Transformers — turns ratio, regulation, calculations
  • Induction and synchronous machines
  • Ohm’s law, resistors, and circuit analysis
  • Circuit breakers, fuses, and protective relays
Was this page helpful?
Last updated April 2026 · NEC 2023 Edition