California CDL Combination Vehicles Knowledge Test Practice Questions
100 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.
- Driving combination vehicles safely (handbook 6.1): 20%
- Combination vehicle air brakes (handbook 6.2): 14%
- Anti-lock brake systems (handbook 6.3): 6%
- Coupling and uncoupling (handbook 6.4): 30%
- Inspecting a combination vehicle (handbook 6.5): 10%
- Federal combination vehicle rules (49 CFR 383 and 393): 20%