Free Study Guides for the CDL

If you’re trying to get your class A, B, or C CDL license, our free study guides for the CDL test can be a big help! We give you a summary of the information you need to know arranged by section, so you easily study the information that pertains to the type of CDL license you want. Whether you’re short on time or using our study guides together with our CDL practice test, our free study guides for the CDL test are an important tool to help you ace the exam the first time!



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Air Brakes Test

If you want to drive a truck with air brakes, you’re going to need to take, and pass, this test. To avoid an air brake restriction on your CDL, review the concepts in this study guide and be prepared for test day!

Combination Vehicles Test

Are you looking for things to study for the Combination Vehicles test? Well, you’re in the right place. Our study guide will outline it all for you and you can get your preparation started!

Doubles/Triples Test

This study guide can help you know what to study before taking the Doubles/Triples test to go with your class A license. You’ll need this type of endorsement to drive a tractor with two or three trailers.

General Knowledge Test

There are lots of regulations you’ll need to know to obtain your Commercial Driver’s License (CDL). Many of these are covered in the General Knowledge section of the CDL test and this study guide will help you know what to study.

Hazardous Materials Test

Driving a truck that carries hazardous materials requires an additional set of safety precautions. Use this study guide to prepare for the Hazardous Materials test and become certified to transport such hazardous things as gases and flammable materials.

Note: Be sure to check specific regulations in your state regarding these guidelines. States may differ in what they require and your state’s CDL manual should be your final authority.

Passenger Transport Test

Passing the Passenger Transport test will entitle you to transport eight or more people in a for-hire vehicle. Learn what you need to know about passenger transport from this study guide and ace the written part of the test. (There is also a road test component.)

Tanker Test

If you want to drive a truck that carries liquids or liquid gas in amounts of 1,000 gallons or more, you’ll need this certification. Find out how to prepare by using this study guide!




We hope you find our study guides useful as you study to obtain your CDL license! If you’re social like we are, we’d love to connect on Facebook, Twitter, YouTube, Instagram, and Pinterest. We frequently share trucking related news, stories, and memes, so check in often! Happy studying and best of luck as you begin this exciting step in your trucking career!