CDL Practice Tests

CDL Career Now's free online CDL practice tests will help you check your understanding of Class A commercial truck driver's license rules and regulations. Study the CDL manual, and then take practice tests including general knowledge, combination vehicle, HAZMAT, tanker, and others. Tests are designed to supplement your CDL classes and have been updated for 2020.

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More reading: Pre-trip inspection checklist - CDL study guide

General Knowledge

Our general knowledge CDL practice test has questions and answers designed to help you check your understanding of general truck driver rules and regulations.

Combination Vehicles

Test your knowledge of combination vehicles before you take your combination vehicles certification test at the DMV. Give yourself a passing chance before you take on the required exam.

Air Brakes

Practice your skills and test your knowledge regarding air brakes before you take the state certification air brake test.

HAZMAT Endorsement

Interested in advancing your career by obtaining a HAZMAT endorsement? Before you take your state's test, make sure you are prepared by answering our practice test questions.

Tanker Endorsement

Looking to earn your tanker endorsement? Don't take the state required exam without preparing with our practice test first. Test your current knowledge and identify areas that need improvement.

Doubles and Triples Endorsement

Preparing for the doubles and triples endorsement? Use our practice test to help set yourself up for success before taking on the state exam at your local DMV.

School Bus Endorsement

Our school bus CDL S endorsement practice test has questions and answers designed to check your understanding of the safe operation of a school bus.

Pre Trip Inspection Engine Compartment

The CDL pre trip inspection checklist includes a section about the engine compartment and this true or false practice test will help you check what you know.