All your missed questions are saved
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It's a practice test that's automatically made up of all your missed questions. Once you finish this test, you’ll be able to revisit your Challenge Bank™ to practice and sharpen your skills.
View All PlansAdding difficult questions to Challenge Bank™ is an exclusive Premium feature. Unlock access to 650+ exam-like questions, a Pass Guarantee, personalized study plans, and more.
View All Plans| 90-100 | => | 7% |
| 80-89 | => | 10% |
| 70-79 | => | 25% |
| 60-69 | => | 25% |
| <60% | => | 32% |
While you may not be a pilot landing a plane at LAX, it is just as critical for you to learn about operating air brakes. Air brake systems are standard equipment on most semi-trucks, tractor-trailers, and buses. Restrictions on your California Commercial Driver’s License (CDL) that prevent you from operating air brakes will severely restrict your ability to qualify for highly sought-after jobs in multiple sectors, including technology, entertainment, and manufacturing. Your understanding of how to apply air brakes will keep you safe while driving through difficult-to-navigate turns and in heavily congested traffic areas. While safety comes first, it must be exercised by receiving the appropriate training.
Chief Educational Researcher, Driving‑Tests.org (ACES member)
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If you’re making safety a top priority, you should insist on receiving the expert instruction our California DMV CDL air brake “endorsement” practice test provides. The practice test is your gateway to a wealth of information to help you obtain your air brake qualification. This qualification requires you to successfully identify and inspect the air brake system components and pass an official knowledge test. The practice test uses a format and 30 multiple-choice questions similar to those on the official knowledge test. You will be able to use it to establish a baseline for tracking your learning progress. Once you are able to correctly answer 80% of the 25 questions, you will achieve the required passing score for the official knowledge test.
This California DMV CDL air brake “endorsement” practice test offers a fresh alternative to traditional study methods that is more effective in teaching you about air brakes. You may have experienced the frustration of understanding complex concepts using those traditional study methods, such as study guides. Those resources are designed to rapidly move you through the learning process so you can learn the bare minimum needed to pass. Study guides train you to memorize the answers to the test questions. This approach leaves out important information you may need to know to answer the more difficult questions on the official knowledge test and keep you safe while driving. The practice test is based on the most recent California DMV CDL manual (California CDL Handbook 2025) and is up to date as of December 2025. If you submit an incorrect answer, the practice test provides a thorough explanation of the correct one. You will receive the information you need to fill your knowledge gaps and apply it to various driving scenarios you encounter on the official knowledge test or behind the wheel of your vehicle. The practice test gives you the skills and confidence necessary to pass the official knowledge test on your first attempt.
Passionate surfers love catching some waves in Malibu, and you can steer your way toward excellent driving skills by using the practice tests at https://driving-tests.org/california/.
Driver’s Ed is - nobody wants to set foot inside the DMV. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2025 CA Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DMV.
