CSLB Drywall (C-9) Trade Examination — Questions: Not published by CSLB · 210 minutes · Passing score: Not published by CSLB.
Your other CSLB exam
This license also needs the Law and Business exam (CSLB can waive an exam in some cases). 110 lessons, 732 practice questions.
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The same 100 questions, dealt five ways. Pick the one that fits the time you have.
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Before you sit
See the questions first
Real items, with the answer marked and the reason written out — the same format as all 100.
Under the Residential Code table, what is the maximum screw spacing for 3/8-inch board on a wall with studs 16 inches on center, without adhesive?
Why: The 3/8-inch wall row at 16-inch framing lists nails at 8 inches and screws at 16 inches. Twelve inches is the ceiling screw spacing, 8 inches is the nail spacing, and 24 inches applies only with adhesive in some rows.CRC Table R702.3.5
Under Cal/OSHA Title 8 Section 1509, where must the employer's Code of Safe Practices be kept on a construction job?
Why: The Code "shall be posted at a conspicuous location at each job site office or be provided to each supervisory employee who shall have it readily available." A home-office file, an annual mailing and the inspector's records do not make it available on the job.T8 CCR §1509(c)
The exam itself
| Questions | Not published by CSLBCSLB says only that “All trade examinations consist of multiple-choice questions.” No count appears in the study guide, the Examinations FAQ, or PSI's candidate bulletin. |
|---|---|
| Time | 210 minutesCSLB: “You will be given 3-1/2 hours to complete each examination.” It is per examination, not per sitting — a candidate taking Law and Business plus a trade exam gets 3-1/2 hours for each. |
| Sections | Planning and Estimating · Preparation, Framing, and Layout · Installation and Repair · Finishing · Safety |
| Passing score | Not published by CSLBCSLB: “You will be informed at the test site about the percentage of correct answers needed to pass each examination,” and, in Get Licensed to Build Q14, that the percentage “varies for each exam”. Passing candidates are never shown their own score. PrepPass states no passing score for this exam. |
| Our bank | 100 questions · updated October 2026Written from California Contractors State License Board (CSLB) |
| Languages | English |
| Source | California Contractors State License Board (CSLB)Verified 2026-10-30 |
Contractor License Exams
Questions
All 100 questions, the timed mock and the report are free with no sign-up. A free account only adds saving your progress.
No. Ours is 100 questions in 210 minutes; the real exam is 210 minutes long. Use the mock for stamina and section timing, not as a score predictor.
Not published by CSLB. CSLB: “You will be informed at the test site about the percentage of correct answers needed to pass each examination,” and, in Get Licensed to Build Q14, that the percentage “varies for each exam”. Passing candidates are never shown their own score. PrepPass states no passing score for this exam.