Contractors — CSLB Trades · Coming soon
CSLB C-60 — Welding Exam Prep
3H WeldStory — a story makes it stick. Built to help you walk in ready.
🎯 Start free — right now
- ✓ The first story, free
- ✓ The first chapter of questions, free
- ✓ A 10-question mini diagnostic, free
- ✓ One full practice mock exam, free
- ✓ No card required to start
The free parts live inside the app itself. Buying unlocks the full question bank in the same app — your progress carries over.
What's inside
- ✓ Story lessons that carry the rules inside a plot you remember
- ✓ 1,000 original practice questions, grouped in 50 chapters
- ✓ An explanation for every answer choice — why it is right, or why it is not
- ✓ Real-format mock exams, a wrong-answer deck, and weakest-topic practice
- ✓ Learning notes that appear in the language you choose — English explanations are always complete
📋 About the real exam
- Two exams
- A contractor license requires the Law and Business exam AND the trade exam for your classification. This app prepares you for the trade side.
- Application fee
- $450 for one classification, paid to CSLB with the application.
- Exam fee
- $51.43 per exam, paid directly to PSI when you schedule each exam.
- Time window
- You have 18 months from application acceptance to pass both exams.
- Retakes
- If you fail an exam, wait 21 calendar days before retaking it, and pay the PSI exam fee again.
- Passed results
- A passed exam result stays valid for five years while you finish the other exam.
- Experience
- Journey-level experience (typically four years) must be documented and certified with your application.
Fees, formats and rules change — always confirm the final details on the official exam site before you apply.
🧾 Exam-day checklist — preview
- ☐ Government-issued photo ID — the name must match your application
- ☐ Your exam confirmation or scheduling notice
- ☐ Arrive 30 minutes early — late arrivals can be turned away
- ☐ Know what you may bring: most test centers ban phones and notes
- ☐ Eat, sleep, and plan the route the night before — not the morning of
- ☐ Check the official exam site the day before for last-minute changes
The full checklist for this exam — what to bring, what the center provides, and the morning-of routine — lives inside the app.
Questions
- Is this the official exam?
- No. These are original practice questions in a study app. 3H TestPrep apps are study aids with original practice questions. They are not official exams, are not affiliated with any testing organization or government agency, and do not provide or replace any required education, training, or certification.
- Is it a subscription?
- No. One payment of $49 and it is yours to keep — no expiry, nothing renews. The only time-limited product we sell is the All-Access Pass (one year), and it never auto-renews.
- Will this make me pass?
- No app can promise that, and we will not pretend to. What we can give you is the whole question bank, an explanation for every answer, and a readiness score that shows exactly where you stand — the rest is your study, and we built this to make every hour of it count.
- How do I unlock the full app after buying?
- Your receipt email carries an unlock code (see Redeem a code). Type it into the app once — it works offline, and your free-trial progress stays.
3H TestPrep apps are study aids with original practice questions. They are not official exams, are not affiliated with any testing organization or government agency, and do not provide or replace any required education, training, or certification.
Keep going — related exams
Many candidates take a neighboring license next. Each is a separate one-time purchase — or take them all with the All-Access Pass.