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CDL Questions & Answers


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There is a lot of information to study when preparing for your CDL knowledge tests.

Based on our own experience and research and feedback from our users, we’ll collected some of the most common CDL test questions and answers to help you study.

Here you’ll find answers and explanations to some common CDL written test questions as well as a reference to where you can find the topic in your official CDL manual.

Study hard and good luck!

Air Brakes Questions & Answers

CDL Braking Questions & Answers

How should you drive a commercial vehicle in reverse?

What are CDL retarders?

What is a pre trip inspection?

What is a standee line?

What is a trolley valve?

What is another name for front end header boards?

What is the “crack the whip” effect?

What is the average driver’s reaction time?

What is the bridge formula?

What is the only way to sober up after drinking?

What must be included on your IVDR/Driver Trip Report?

What should you do if you are being tailgated?

What should you do when driving on slippery roads?