CSLB exam prep — the fastest specialty crash course on the internet.

What CSLB exam prep actually is

The California contractor exam, demystified.

The California Contractors State License Board (CSLB) administers two exams for almost every licensed classification: a state-specific Law & Business exam and a trade exam matched to your classification (B General Building, or any of the C-class specialty trades). Both are closed-book, multiple choice, computer-based, and given at PSI testing centers. The exams sample from public CSLB study materials and California code references — there is no secret bank of questions.

What "prep" means in practice: drilling thousands of paraphrased questions in the same blueprint weights the real exam uses, until you can answer the average item in under 60 seconds and explain why each answer is correct.

• Law & Business: required for every classification, regardless of trade.
• Trade exam: B General Building or a C-class specialty (C-10 Electrical, C-36 Plumbing, etc.).
• Both are computer-based, multiple-choice, 115 questions, 3.5 hours.
• 73% is passing on the trade exam at time of writing — verify on the CSLB site for your classification.

How AmericasMarket prep works

AI crash course + full-length mocks + cheat sheets.

Three loops, in this order. (1) The AI crash course drills the question bank in priority order, weighted toward your weakest topics from the first minute. (2) Full-length timed practice exams simulate test day: 115 questions, 3.5 hour clock, no pause. (3) Single-page cheat sheets compress the magic numbers — board feet, decimal feet, roof pitch, code constants — into something you can print and glance at on the way to PSI.

You run all three in a single day. The crash course is engineered to land you pass-ready across the full 1000+ question bank — 6–10 hours for any license, Law & Business or any trade exam, a single day. One day, not two weeks.

Coverage

Every classification, one platform.

We cover the California Law & Business exam, B General Building, and every C-class trade — from C-10 Electrical and C-36 Plumbing to C-46 Solar and C-57 Well Drilling. One classification is $499 with 1-year access. The $899 Smartest Pick — All Licenses bundle unlocks every classification (and every state's Law & Business exam we publish in the future) for a full year. There are no per-attempt fees on the practice exams, and every kit is backed by our pass-first-try-or-it's-free guarantee.