CSLB Plumbing (C-36): Study Guide and Online Practice Exam + Law and Business Study Guide and Online Practice Exam
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What’s included
- Learn the material: Plumbing (C-36) Study Guide Book
- Pass the test: Plumbing (C-36) Practice Exam
- Required for all California contractor applicants: Law & Business Study Guide Book and Law & Business Practice Exam
What this covers
Per the state's classification, a C-36 contractor installs, alters, and repairs water supply systems, drainage systems, gas lines, sewers, and plumbing fixtures in residential and commercial structures. This printed book covers the subjects the state tests. See the official CSLB C-36 classification.
Sample questions — Try our free practice test
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Unless listed as flammable-vapor-ignition-resistant, how high above a residential garage floor must a gas water heater’s pilots, burners, and burner-igniter devices be installed?
A. 12 inches · B. 18 inches ✓ · C. 24 inches · D. 36 inches
Answer basis: 2025 CPC §507.13. -
Under the 2025 California Plumbing Code, what is the maximum permitted distance between gas utilization equipment and its accessible manual shutoff valve?
A. 3 feet · B. 4 feet · C. 6 feet ✓ · D. 10 feet
Answer basis: 2025 CPC §1212.6. -
Of the following, which single-wall appliance vent connection is permitted?
A. Horizontally in a plastered partition · B. Vertically through the attic · C. Vertically through the floor to the roof · ✓ D. Through the exterior wall to the outer air -
The minimum size strap for a hot water heater is:
A. 1"- 20 gauge · B. 1-1/4"- 18 gauge · ✓ C. 1-1/2"-16 gauge · D. 2"-16 gauge -
What is the typical daily water usage per person in a home?
A. 15 gallons · B. 25 gallons · ✓ C. 50 gallons · D. 75 gallons -
To test for leaks in a gas piping system use:
A. a flame · ✓ B. a solution of soapy water · C. a sharp nose · D. a canary -
[Law & Business] A construction contract was written containing the following time estimates to complete the job. It would take 2 days to ready the construction site and then the job itself would be done in 2 phases. The first phase would take 10 days and the second would take 7 days, but these 2 phases could be at the same time. It would take one additional day at the end to clean up. How many days would it take to complete this project?
A. 15 days · ✓ B. 13 days · C. 11 days · D. 7 days -
[Law & Business] A contractor receives a notice from the Employment Development Department (EDD) that one of his former employees has filed a claim for Unemployment Insurance (UI) benefits against his reserve account. He/she may:
A. call EDD within 5 days and protest · ✓ B. protest, in writing, within 10 days of the mailing date of the notice · C. protest, in writing, within 30 days of the mailing date · D. protest, in writing, within 45 days of the mailing date
California contractors who passed
English is my second language, so I needed more time. The diagrams helped me learn the material even when I did not know every word.
I studied while my kids did their homework. One hour a night, and I passed both tests.
The business exam has a lot of rules and numbers to remember. Repeating the practice questions was the only way for me.