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CSLB exam preparation
Class B General Building Contractor Exam Prep
Practice planning and estimating, structural components, core and finish trades, and job-site safety.
About this exam
CXP's Class B question bank has 277 practice questions for general building topics. Take a free diagnostic to see a snapshot of your current answers and choose what to review.
The General Building guide applies to exams scheduled on or after January 1, 2025, and lists approximate section percentages. CSLB's Examination FAQ lists a 3.5-hour exam duration but no per-trade question count. CXP's 115-question mock is not an official exam length.
- Practice bank size: 277 questions
- Mock exam size: 115 questions
Official CSLB study-guide topics
- Planning and Estimating — Approximate exam percentage: 15%
- Framing and Structural Components — Approximate exam percentage: 20%
- Core Trades — Approximate exam percentage: 30%
- Finish Trades — Approximate exam percentage: 20%
- Safety — Approximate exam percentage: 15%
Exam topics and approximate weights: CSLB study guide.
Sample question
What does Underground Service Alert assess?
- Excavation clearance limits
- Permit status
- Subsurface soil capacity
- Utility locations
Show answer and explanation
Correct answer: Utility locations
Explanation: Underground Service Alert coordinates utility-owner notifications and provides information about utility locations; it does not independently evaluate soil capacity, excavation clearances, or permit status. The required sequence is: submit the excavation notice, allow operators to respond, and use their markings to identify utility locations before digging. California Government Code §§4216.1 and 4216.2 govern this process, so Utility locations is correct while the other choices describe separate engineering, safety, or permitting functions.
The CXP prep module
Trade exam preparation for Class B general building work.
- A practice question bank and timed mock exam for this module.
- A Readiness Score to track progress by topic.
- Questions and explanations available in English and Spanish.
Law & Business + one trade
$249
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Use the free diagnostic to find your starting point before choosing what to study.