California General Knowledge Practice Test 2026
The foundational California commercial-driver knowledge examination covering the rules and safety principles every CDL applicant is expected to understand.
What Is the California General Knowledge Practice Test?
The foundational California commercial-driver knowledge examination covering the rules and safety principles every CDL applicant is expected to understand.
This test is for every applicant seeking a California Class A, Class B or applicable Class C commercial driver license. It should be the first study priority because endorsement and vehicle-specific tests build on the same core safety concepts.
Who is this test for?
This test is for every applicant seeking a California Class A, Class B or applicable Class C commercial driver license. It should be the first study priority because endorsement and vehicle-specific tests build on the same core safety concepts.
When is it required?
Required for all California CDL applicants, regardless of whether the intended vehicle is a tractor-trailer, straight truck, bus, tanker or another qualifying commercial motor vehicle.
- Practice questions
- 50
- Passing target
- 80%
- Recommended readiness
- 90%+
- Price
- Free
- Explanations
- Immediate
- Official exam?
- No
Topics Covered on This Test
Vehicle inspection and defect reporting
Basic vehicle control and safe backing
Seeing hazards and communicating with other road users
Speed, space and following-distance management
Stopping distance and brake limitations
Night, mountain, winter and hot-weather driving
Railroad crossings and work zones
Driver fatigue, distraction, alcohol and controlled substances
Cargo inspection and securement responsibilities
Emergency maneuvers, tire failure, brake failure and crash procedures
Requirements
- ✓ Hold a valid California noncommercial driver license or meet California DMV application requirements.
- ✓ Submit a California driver license/CDL application and required identity, Social Security, residency and lawful-presence documents.
- ✓ Meet applicable vision, medical self-certification and DOT medical-certificate requirements.
- ✓ Pay current California DMV application, testing and endorsement fees.
- ✓ Pass every knowledge test required for the requested CDL class, brake system and endorsements with at least the applicable passing standard.
- ✓ Use the current California Commercial Driver’s Handbook and confirm requirements directly with California DMV.
How to Prepare
- 1Read Sections 1–3 instead of relying only on practice questions.
- 2Memorize safety procedures only after understanding why they work.
- 3Practice calculations involving following distance and stopping distance.
- 4Review every missed answer and open its handbook reference.
- 5Reach at least 90% consistently before scheduling the DMV test.
Take the 50-Question Test
Answer every question. You will receive immediate feedback and a handbook-based explanation before moving forward.
General Knowledge Practice Test
Why should you perform a pre-trip inspection?
Frequently Asked Questions
Who must take General Knowledge?+
Every California CDL applicant must demonstrate the general commercial-driving knowledge applicable to safe CMV operation.
Is General Knowledge enough for a Class A CDL?+
No. A Class A applicant normally also needs Combination Vehicles and, when applicable, Air Brakes plus any requested endorsement tests.
Does this practice test contain 50 questions?+
Yes. This page contains exactly 50 practice questions, matching the number displayed on the test card.
What score should I target?+
The minimum standard is generally 80%, but a consistent practice score of 90% or more gives a better preparation margin.
Are the questions copied from DMV?+
No. California DMV does not publish its active question bank. These original practice questions are based on topics in the official handbook.
Verify official requirements.
This is a practice resource, not the California DMV examination. Requirements, fees and procedures can change. Confirm current information with California DMV and the official handbook.