CSLB General Building (B) Trade Exam
Free practice for the California CSLB General Building (B) trade exam — the craft/classification test you take in additionto the Law & Business exam. Original questions in English, 中文 and Español, with 2025 California code references.
To get a B license you must pass two exams: the Law & Business exam and this General Building (B) trade exam. Both are about 3.5 hours at a PSI center. (CSLB does not publish the exact question count or passing score for the trade exam — you're told the passing mark at the test site.)
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🎯 Full timed mock exam
A 100-question, 3.5-hour simulation to test your readiness.
What the B trade exam covers
30%
Core Trades
concrete · electrical · plumbing · HVAC · roofing · earthwork
20%
Framing & Structural
framing · roof · seismic hardware · siding & stucco · decks & stairs
20%
Finish Trades
drywall · tile · flooring · cabinetry · windows & doors · paint
15%
Planning & Estimating
plans & specs · cost takeoffs · inspection · coordination
15%
Safety
Cal/OSHA · traffic control · environmental