Free District of Columbia CDL Permit Practice Test: General Knowledge 2025

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
Based on 2025 DC commercial driver's license manual
Triple-checked for accuracy
Updated for May 2025

Washington, D.C., with an area of just 68 square miles, has a gross domestic product (GDP) of $99 billion per year. That’s more than states 2,100 times its size. Such a large GDP would be completely impossible without commercial drivers to move goods and products in and out of the district -- which is where you come in. You will soon receive or renew your commercial driver license (CDL), and this practice quiz will help make that possible by giving you realistic practice for the CDL written exam. These 50 multiple-choice questions cover crucial information from the Washington, D.C. Commercial Driver License Manual, as well as federal and local laws. You’ll be tested on right-of-way rules, braking and shifting techniques, driving in special weather and road conditions, handling emergency situations, and more. Use the hint provided with each question, and read the explanations carefully to ensure that you’ll be able to answer future questions correctly. Come back and keep practicing until you feel comfortable with the information. Good luck on your CDL exams!

FAQs

How can you obtain yours?

To obtain a CDL license in the District of Columbia, first acquire a commercial learner’s permit (CLP) by passing the required knowledge tests. Hold the CLP for at least 14 days before taking the skills test. Then, complete CDL training (recommended) and pass the skills test. Ensure you meet all age and medical requirements.

What is the associated cost?

The cost for a CDL in the District of Columbia includes a $78 fee for the CDL, a $10 fee for the knowledge test, and a $10 fee for the CLP. Additional fees may apply for skills testing and medical examinations.

How many questions are on the official test?

The CDL permit test in the District of Columbia typically consists of 30 to 50 questions, depending on the class of CDL and endorsements. You need to score at least 80% to pass.

What is the minimum age required?

You must be at least 21 years old to obtain a CDL in the District of Columbia for interstate transportation or to transport hazardous materials. For intrastate transportation, the minimum age is 18.

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