California CDL Air Brakes Knowledge Test Practice Questions
107 original questions with cited readings, answer explanations, and feedback for each alternative.
Approved after AI editorial review on 2026-10-30. These are original practice questions, not official California Department of Motor Vehicles (DMV) exam questions.
Official exam outline from California Department of Motor Vehicles (DMV)Loading questions…
Practice coverage
This bank uses the following practice allocation. Check the official exam outline for current ranges and requirements.
- Parts of an air brake system (handbook Section 5.1): 25%
- Dual air brake systems and inspection (handbook Sections 5.2 and 5.3): 35%
- Using air brakes (handbook Section 5.4): 25%
- Federal air brake rules (49 CFR 383 and 393): 15%