Adaptive drills
Every wrong answer reweights your plan. You spend more reps on what's still shaky, not what you already know.
California CSLB · Contractor License Exam Prep
California contractor license exam prep, online and self-paced.
Practice California-specific questions for your contractor trade exam and Law & Business on any device, with instant rationales and readiness tracking. No classroom required.
Online exam prep for California CSLB candidates, in 8 languages.
Practice online before exam day; applications, scheduling, testing, and licensing happen outside Test2Pro.
Free practice test
Try a free practice test
Sample real exam-style questions with instant explanations — no login required.
- Sample question set
- Instant explanations
- No login
- Topic feedback for the sample
CONTENT MAPPED TO CURRENT CODE REFERENCES · UPDATED QUARTERLY
NEC 2023 Aligned
IAPMO UPC 2024
AWS D1.1
EPA 608
NABCEP PV
CSLB Topics
NFPA 70E
Mechanical Code
9.2k+
practice questions
All written & reviewed by credentialed tradespeople
92%
users feel more prepared
Self-reported after full prep plan
18min
average daily session
Short, consistent reps beat cramming
8
languages in AI tutor
EN · ES · ZH · TL · VI · KO · HY · RU
01 · ExamsPick your trade.
Pick your trade.
We've already mapped the blueprint.
Every exam prep package is built from the official content outline — so your practice covers every domain the real test can touch, weighted the way the test weights it.
ELE
Electrical
Journeyman · Master · C-10
HVC
HVAC / Refrigeration
EPA 608 · C-20 · NATE
PLB
Plumbing
Journeyman · C-36 · Medical gas
GBC
General Building
B · Law & Business
WLD
Welding
AWS · Structural · Pipe
SOL
Solar & PV
NABCEP · C-46
LOW
Low Voltage
C-7 · Fire/Life Safety
L&B
Law & Business
Contractor exams
02 · How it works
Four steps from "where do I start" to test-day confident.
01 Pick your exam Choose your California classification — B General Building, C-10 Electrical, or Law & Business. We pull the current CSLB content outline and build your plan against it.
02 Take the diagnostic A 20-minute adaptive quiz finds your weak domains. No guessing what to study — your plan is built around what you actually need.
03 Drill with AI Pro Every miss gets a plain-English breakdown. Ask follow-ups. Switch languages. Save the ones you still don't get.
04 Full mock exam Same length, same timing, same question style as the real one. When your mock score hits target, you're ready.
Exam catalog · preview
ELE
Electrical
2.4k+ questions
HVC
HVAC / Refrigeration
1.8k+ questions
PLB
Plumbing
1.6k+ questions
GBC
General Building
2.7k+ questions
WLD
Welding
900+ questions
SOL
Solar & PV
700+ questions
03 · What's inside
Built for how trade candidates actually study.
Short reps, honest feedback, and a tutor that speaks your language. No gimmicks — just the prep you wish you'd had the first time.
AI Pro tutor
On every question: plain-English explanations, deeper hints, and follow-up questions. Ask in your language.
Real-exam mocks
Same format, same length, same clock as the exam you're sitting. The only surprise on test day is the room.
Code-referenced
Every question cites the NEC / UPC / IMC / applicable-code section so you learn to look things up the way the exam expects.
AI Pro in your language
When a question needs more context, ask AI Pro in your language while you practice.
Topic-mapped practice
Focused practice built by credentialed California tradespeople and organized around published exam topic areas.
04 · Reviews
Tradespeople who stopped guessing.
"The diagnostic showed exactly where my C-10 prep was thin. I could focus my study blocks instead of rereading everything."
MR
Marcus R.
C-10 Electrical Candidate
"AI Pro help in my language was the difference. Spanish is my first language, and I could actually understand the NEC reasoning."
LH
Luis H.
C-10 Candidate
"The B prep finally put trade topics and Law & Business in one place. My weekly plan stayed focused instead of scattered."
KD
Kendra D.
B General Building Candidate
"Law & Business was the exam I worried about most — the wording, not the work. The drills put contracts, liens, and payroll rules in plain language, and nothing surprised me on test day."
EV
Elena V.
Law & Business Candidate
05 · PricingStart with your trade exam.
Start with your trade exam.
Bundle what most applicants actually need.
Pick the exam prep package for your classification, add Law & Business when your license path requires it, and choose AI Pro only if you want deeper study help.
Start here
Trade exam prep package
From
$199
Starting trade package
Start with the prep package for the classification you are testing for.
Question bank
Timed practice
Mock exams
Weak-area tracking
Common package
Law & Business bundle
Add to package
+$100
Business-law prep, bundled
Covers the business-law side most California contractor applicants pair with their trade exam.
One checkout path
Trade exam + business-law prep
Access length selected at checkout
Optional
AI Pro add-on
Add
$20/mo
Optional monthly add-on
Add deeper hints, follow-up questions, and help in your language when you need it.
8 supported languages
Expanded hints
Follow-up questions
Final price depends on selected exam, access length, package choice, and AI Pro. It covers digital prep access only; exam registration, licensing, and results are handled separately.
06 · FAQ
Answers to the real questions.
Do you guarantee I'll pass?
No one can honestly guarantee an exam result. What we can say is that our prep plan is built from the published content outlines, and candidates who complete their full plan report meaningfully higher confidence and first-try pass rates.
How often do you update content for new codes?
Question banks are reviewed quarterly and updated whenever a relevant code cycle changes. Every question cites the specific code section it's drawn from.
Can I use Test2Pro in Spanish (or another language)?
Yes. Use Test2Pro in English, Spanish, Chinese, Tagalog, Vietnamese, Korean, Armenian, or Russian, and ask AI Pro for extra context in your language when a question needs more explanation.
What if I just want a free taste?
Start with the Starter experience: sample questions, basic explanations, and no card required. If it clicks, paid prep unlocks the full bank and the AI tutor.
Pick your California exam prep bundle
Start with your California classification: B General Building, C-10 Electrical, or Law & Business. Most applicants bundle Law & Business with their trade exam.
TEST-DAY READY
Walk into the exam room
like you've been there before.
Start with a free diagnostic. See your weak areas in 20 minutes and build a focused study plan.
Get your weak-area map in 20 minutes
Focused study plan tailored to your exam
AI tutor in your language 8 supported languages
Full-length mock when ready same feel as test day