California CDL Written Test — Questions, Cost & Study Tips (2026)

Studying for your California CDL written exam? Here is what applicants typically need to know before visiting California DMV.

How many questions on the California CDL test?

California general knowledge written exams commonly include about 50 multiple-choice questions for the core CDL knowledge test. Endorsements such as air brakes, combination vehicles, hazmat, and passenger are separate written tests if your license class requires them.

PassCDL mirrors this structure: start with general knowledge, then add endorsement practice for the tests you need.

California CDL test cost (approximate)

Written exam fees at California DMV are typically $36–$46 per attempt (varies by office and endorsement). Failing and retesting can cost more than a month of PassCDL Pro — many students prefer unlimited practice before test day.

California study tip

California DMV CDL written tests include federal rules; hazmat requires TSA background clearance before testing.

Free CA CDL practice test

Use our California CDL practice test for scored questions and explanations. PassCDL Pro adds full exam simulations, all endorsements, and unlimited retakes.

See also: How many questions on the CDL test? · CDL general knowledge study guide

Educational practice only — not affiliated with California DMV or any state DMV.