Free C-10 Practice Test: 600 Questions With Answers
No sign-up and no email needed to practice. Pick a section, answer a question, and see right away whether you got it, why, and the source the answer was checked against.
- 600 free questions across both exams you need to pass: the C-10 trade exam and Law and Business.
- Every answer was checked by code against the official text it cites, and that source is shown under the explanation.
- In English and Spanish. The same questions in Spanish are at /es/practica.
- The trade sections follow CSLB's C-10 study guide, with its weight for each section.
C-10 trade exam
Law and Business exam
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Take the free 10-question C-10 check for a score by section, or try Ride-Along, which tells you why the answer you picked was wrong.
Common questions
Is this C-10 practice test free?
Yes. All 600 questions are free, with answers and explanations, and you do not need an account or an email to use them.
Are the answers explained?
Yes. Every question shows a written explanation and the source it was checked against, such as the California Electrical Code section or the CSLB document.
Is the practice test in Spanish?
Yes. The same questions are in Spanish at /es/practica. The C-10 trade exam itself is given in English; CSLB allows an approved translator.
How is this different from the full course?
The full course has 1,202 practice questions, lessons for both exams and full-length timed practice exams.