CDL Study Guide 2025-2026 - 650+ Practice Test Questions, Secrets Prep Book for the Commercial Driver's License Exam with Detailed Answer Explanations

Mometrix Test Preparation's CDL Study Guide - Secrets Prep Book is the ideal prep solution for anyone who wants to pass their Commercial Driver's License Exam. The exam is extremely challenging, and thorough test preparation is essential for success. Our study guide includes:

• 25 practice tests available in online interactive format (25 of these printed in the guide)
• Tips and strategies to help you get your best test performance
• A complete review of all CDL test sections

Mometrix Test Preparation is not affiliated with or endorsed by any official testing organization. All organizational and test names are trademarks of their respective owners.

The Mometrix guide is filled with the critical information you will need in order to do well on your CDL exam: the concepts, procedures, principles, and vocabulary that the state licensing board expects you to have mastered before sitting for your exam.

Sections include:

• General Information
• CDL Exam General Knowledge
• Basics of Controlling Your Vehicle
• Communication
• Space Management
• Hazardous Conditions
• Air Brakes
• Cargo and Transport Vehicles
• Tank Vehicles
• Combination Vehicles (Doubles and Triples)
• Hazardous Materials
• Passenger and School Bus

...and much more

Our guide is full of specific and detailed information that will be key to passing your exam. Concepts and principles aren't simply named or described in passing, but are explained in detail. The Mometrix CDL study guide is laid out in a logical and organized fashion so that one section naturally flows from the one preceding it.

Any test prep guide is only as good as its practice questions and answer explanations, and that's another area where our guide stands out. The Mometrix test prep team has provided plenty of CDL practice test questions to prepare you for what to expect on the actual exam. All 25 practice tests are available to take in online interactive format, allowing you to immediately score your test and see what you got wrong. We've also printed all 25 practice tests in your guide for offline reference.

We've helped hundreds of thousands of people pass standardized tests and achieve their education and career goals. We've done this by setting high standards for Mometrix Test Preparation guides, and our CDL Study Guide - Secrets Prep Book is no exception. It's an excellent investment in your future. Get the CDL review you need to be successful on your exam.