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Based on this free sample only — it shows where to focus, not whether you'll pass.
Free practice test
Free California C-10 Electrical Contractor Practice Test
Try a free sample of California C-10 Electrical Contractor exam-style questions with instant explanations — no login required.
Test2Pro provides online prep only; CSLB and PSI handle exam scheduling, testing, licensing, and results.
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- Instant explanations
- 4 languages
00:00
One million watts equal one:
What this free test covers
Answer 20 original C-10 Electrical Contractor exam-style questions, then review your result by published topic area.
Exam topic areas
The C-10 Electrical Contractor exam is built from these published CSLB topic areas. Test2Pro groups your practice against the same areas so your feedback reflects how the real exam is weighted:
- Planning and Estimating28% of the exam
- Rough Wiring27% of the exam
- Finish Wiring and Trim11% of the exam
- Startup, Troubleshooting, and Maintenance16% of the exam
- Safety18% of the exam
Topic names and weights follow CSLB C-10 Electrical Contractor study guides; your practice here uses original Test2Pro questions grouped by those areas.
About this free practice test
This 20-question sample uses original C-10 exam-style questions grouped by the five published CSLB topic areas. Your result shows which topics may need more practice; it does not predict whether you'll pass. The full course adds the complete question bank, saved history, and readiness tracking.
Free sample vs full prep
Free sample
- Sample question set
- Instant explanations
- No login
- Topic feedback for the sample
Full prep
- Larger question bank
- Saved practice history
- Readiness tracking
- Full access term
Free C-10 Electrical Contractor practice test — FAQ
Is the C-10 contractor license the same as electrician certification?
No — they are different credentials. The C-10 Electrical contractor license comes from CSLB and lets your business contract for electrical work in California. Electrician certification is a separate state program for electricians who work for C-10 contractors. This page prepares you for the CSLB C-10 trade exam.
What is on the C-10 Electrical trade exam?
The C-10 trade exam draws from five published CSLB topic areas: Planning and Estimating (28%), Rough Wiring (27%), Finish Wiring and Trim (11%), Startup, Troubleshooting, and Maintenance (16%), and Safety (18%). Planning and rough wiring together carry more than half the exam. The free sample above groups your answers by those same areas.
Can I take the C-10 exam in Spanish?
CSLB offers Spanish versions of some exams, but the C-10 trade exam is not on CSLB's published Spanish exam list — check cslb.ca.gov for current language and translator options. The Law & Business exam is available in Spanish. Test2Pro practice is available in English, Spanish, Chinese, and Russian, so you can study in your language while getting used to English exam terms.
How many questions are in the free C-10 practice test?
This is a 20-question sample, not a full mock exam. It uses original C-10 exam-style questions across all five topic areas, and your result appears without login, payment, or a time limit.
Do I need to sign up to take the C-10 sample?
No. Your topic breakdown appears after the last question, and each answer explains the electrical reasoning behind it.
Does the sample predict whether I will pass the C-10 exam?
No. It shows performance by topic, not whether you'll pass. Planning and Rough Wiring are the two largest topic areas, so review those rows first.
How to use your sample score
Start with your lowest-scoring topic. In the full prep, saved history shows whether that area improves over time.
Sources and method
Topic names and weights follow CSLB study guides; practice questions are original Test2Pro content.
Other free practice tests
Larger question bank
Saved practice history
Readiness tracking