Free C-36 Practice Test: 420 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 official source the answer was checked against.
- 420 free questions across both exams you need to pass: the C-36 trade exam and Law and Business.
- Every answer is 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.
- Sections follow CSLB's exam outline, with the trade-exam weights from CSLB's study guide.
C-36 trade exam
Planning and Estimating
60 questions · CSLB weight: about 22%
Start
Underground and Rough Systems
60 questions · CSLB weight: about 22%
Start
Finish Plumbing Installations
60 questions · CSLB weight: about 20%
Start
Service, Repair, and Remodel
60 questions · CSLB weight: about 19%
Start
Safety
60 questions · CSLB weight: about 17%
Start
Law and Business exam
Want a quick score first?
Take the 21-question diagnostic for a score by topic, or try 5 Ride-Along questions that explain why your answer was wrong.
Common questions
Is this C-36 practice test free?
Yes. All 420 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 official source it was checked against, such as the California Plumbing Code section or the CSLB document.
Is the practice test in Spanish?
Yes. The same questions are available in Spanish at /es/practica.
How is this different from the full course?
The full course has 1,074 practice questions, a new timed practice exam every time you start (weighted like the real exam), lessons for both exams, and an AI tutor.