Free California CDL practice test with real commercial driving questions. Prepare for your California CDL exam — General Knowledge, Air Brakes, HazMat, and all endorsements. Updated for 2026.
The California DMV knowledge exam tests your understanding of California traffic laws, road signs, and safe driving practices. DriveAce covers every topic you'll encounter on test day.
Vehicle inspection, cargo management, driving techniques, and documentation.
Air brake system components, inspection, emergency stops, and maintenance.
Hazardous materials classification, placarding, loading/unloading rules.
Liquid surge, rollover prevention, loading and unloading procedures.
Coupling, uncoupling, stability, and safe driving with multiple trailers.
Passenger safety, school bus operations, railroad crossings, evacuation.
The California CDL knowledge test has 50 questions for General Knowledge. You need 80% to pass. Each endorsement (Air Brakes, HazMat, Tanker, etc.) has an additional 20-30 questions.
DriveAce covers General Knowledge, Air Brakes, HazMat, Tanker, Doubles/Triples, Passenger, School Bus, and Combination Vehicle endorsements for California.
Yes! DriveAce offers free CDL practice questions for California. Study General Knowledge and endorsement-specific questions that mirror the real California DMV CDL exam.
You need to score 80% or higher on the California CDL knowledge test and each endorsement test. DriveAce practice tests use the same passing threshold so you know when you're ready.
Join thousands of drivers who passed their test on the first try with DriveAce. No subscription. No ads. Just the knowledge you need.
Start Free Practice Test →$19.99 one-time for full access. 20 free questions included.