- Updated for January 2025
- Based on 2025 TN commercial driver's license manual
Free TN CDL Double/Triple Trailers Practice Test 2025
Since you’re here, you’re probably exploring the option of adding a Double and Triple Trailers endorsement to your Tennessee Commercial Driver’s License (CDL). This is an outstanding step toward expanding the scope of your transport offerings and significantly increasing your earnings potential. Home to the Appalachian Mountains, you’ll find rolling hills and flatlands as you pull doubles in Tennessee and you’ll have a competitive edge against other drivers lacking this endorsement. All you need to do is pass a 20-question multiple-choice knowledge test with a score of 80% (16 correct answers). Once you’ve passed, the “T” endorsement on your CDL will authorize you to pull two or three trailers in areas that allow it (Tennessee CDL Handbook 2025).
In the Volunteer State, you must be at least 18 years of age to add this certification to your CDL. For the younger folks just getting started, keep in mind that the age requirement to travel across state lines is 21 or older. For everyone, while the Double/Triple Trailers endorsement authorizes you to pull both doubles and triples, you are restricted to only pulling doubles in Tennessee. Rest assured though, double trailers are often used throughout Tennessee for the transport of automotive parts and vehicles (Nissan and General Motors have major manufacturing plants in Smyrna and Spring Hill, respectively), agricultural products like soybeans, corn, cotton, and livestock, whiskey and spirits (Lynchburg is a major producer), consumer goods and electronics, and forestry and paper products. By this point, you’re probably saying, “I’ve got to have this! But how do I get ready for this test?”
It’s exhausting looking at the ocean of online resources. That’s exactly why we offer our structured approach to help you focus on what’s really needed. As of January 2025, it includes 20 multiple-choice questions that simulate what you’ll face at the DMV on your test day! But wait, there’s more! While you work through our online Tennessee CDL Double/Triple Trailers Endorsement practice test, you’ll get real-time feedback on each answer allowing you to learn as you go instead of being blasted with multiple corrections at the end of the session.
Confident now that you’ve practiced with our free tests? When you feel ready, simply go to the DMV with your documents and application fee. Pass the test and you’ll be instantly elevated to a new highly-marketable level in your career.
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual TN DMV exam
questions
correct answers to pass
passing score
Helpful links
List of questions (classic view)
- When you're pulling more than one trailer, which trailer should be the first one behind the tractor?
- Which of these statements about quick steering movements and doubles/triples is true?
- You are driving a 100-foot double trailer combination at 50 mph. The road is dry and visibility is good. You should keep at least ____ seconds of space ahead of you.
- Before connecting a converter dolly to a second or third trailer, you should check the height of the trailer. The trailer height is right if
- You are driving a 100-foot double trailer combination at 30 mph. The road is dry and visibility is good. You should keep at least ____ seconds of space ahead of you.
- With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. When you do this, you should hear
- Empty trucks
- Which of these statements about handling doubles and triples is true?
- Before you can supply air to the air tanks of a second trailer, you need to
- You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking, you should
- How can you be sure that you supplied air to a second trailer?
- What is likely to happen if the pintle hook is unlocked while the dolly is still under the second trailer?
- You want to hook your combination to a second trailer that does not have spring brakes. To do this without wheel chocks, you should
- Which of these statements about managing space to the sides is true?
- The crack-the-whip effect that troubles trucks with trailers is most likely to tip over
- You are visually checking the coupling of a converter dolly to the rear trailer. How much space should there be between the upper and lower fifth wheel?
- You are pulling doubles. A set of trailer wheels goes into a skid. Which of the following is most likely to occur?
- You are doing a walk-around inspection of a double or triple trailer rig. You should be sure that the converter dolly air tank drain valves are ______ and the pintle hook is _______.
- A converter dolly is
- A converter dolly consists of a ______ wheel and ________ axles.
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