Class B General Building Contractor
1.7k+ questions in the full course · 5 topics
Free practice tests
Free California contractor license practice tests
Try CSLB-style questions with instant explanations — no login, no payment. Pick your exam below and see where you stand in a few minutes.
- No login
- Instant explanations
- 4 languages
Pick your free practice test
Choose your exam below and try a free practice test before you buy.
C-10 Electrical Contractor
1.3k+ questions in the full course · 5 topics
Law & Business
900+ questions in the full course · 7 topics
Which free practice test is which?
All three follow the official CSLB topic areas — they differ in what the real exam covers and who has to take it.
Class B General Building Contractor
- What it covers
- Whole-structure building work: framing, core trades, finishes, and jobsite safety.
- How it is weighted
- 5 topic areas — core and finish trades together carry half the exam.
- Who takes it
- Applicants for California's most-held general building classification.
C-10 Electrical Contractor
- What it covers
- Electrical work: planning, rough and finish wiring, troubleshooting, and safety.
- How it is weighted
- 5 topic areas — planning and rough wiring carry more than half the exam.
- Who takes it
- Electricians moving into a licensed contracting business.
Law & Business
- What it covers
- The business side: contracts, employment, insurance, finances, public works, and safety rules.
- How it is weighted
- 7 topic areas — contracts and employment carry over 40% of the exam.
- Who takes it
- Required alongside the trade exam for most first-time applicants.
How the real CSLB exams work
The format is set by CSLB and PSI — and every free test here uses the same multiple-choice style you will see on exam day.
- Both exams are taken in person at a PSI test center, scheduled through CSLB — the prep is the part you do online.
- You get 3.5 hours per examination, all multiple choice on a computer.
- The exams are closed-book: no reference materials are allowed in the room.
- CSLB does not publish a fixed passing score — you are told the required score at the test site.
- Most applicants pass two exams to get licensed: the trade exam for their classification plus the business-and-law exam.
Not sure which exam you need?
Your license classification decides which trade exam you take — and most applicants pass two exams to get licensed. The classification guide explains how to choose.
How the free tests are scored
Your answers are grouped by the official CSLB topic areas for the exam. The breakdown helps you choose what to review next; a short sample cannot predict whether you will pass.
What full prep adds
Full prep includes the complete question bank, saved practice history, and readiness tracking.
Free practice tests — FAQ
Are these real CSLB exam questions?
No — CSLB does not publish its exam questions, and no legitimate prep provider has them. Every question here is original Test2Pro content written to the same format and mapped to the official exam topic areas, so practice feels like the real thing without copying it.
Which free practice test should I take first?
Start with the trade exam for the classification you are applying for — each card above opens its free test. Most applicants pass two exams to get licensed, so plan to practice for both. If you have not picked a classification yet, the guide on the classes page walks you through it.
Is there a study guide for the CSLB exam?
Yes — CSLB publishes a free official study guide for each classification on cslb.ca.gov, listing the topic areas and their weights. The free tests and full courses here follow those same topic areas, so your practice lines up with the official outline.
Do the free tests work in other languages?
Yes — the free tests are available in English, Spanish, Chinese, and Russian. Exam-critical terms keep their official English wording, so you get used to the language you will see on test day.