- Updated for January 2025
- Based on 2025 NC commercial driver's license manual
Free NC CDL Double/Triple Trailers Practice Test 2025
Whether you’re looking for the distinct smell of the mountains or the sea salt scent of the coastline, you’ll find it in the terrain of North Carolina. Adding the Doubles and Triples Trailers endorsement to your North Carolina Commercial Driver’s License (CDL) is a must for adding credibility and an assortment of new options and income-producing marketability. The main requirement is passing a 20-question multiple-choice knowledge test. To pass, you’ll need a score of 80%, which means getting 16 correct answers. After you pass, you’ll receive the “T” endorsement on your CDL, authorizing you to pull two or three trailers (where allowed) (North Carolina CDL Handbook 2025).
In the Tar Heel State, you need only be 18 years old to add this certification to your CDL (but you won’t be allowed to haul cargo across state lines until you turn 21). With a Doubles and Triples Trailers endorsement, though, you’re only allowed to pull double trailers in North Carolina. That said, double trailers are used throughout North Carolina for the transport of tobacco products, textiles and apparel, furniture and wood products, and agricultural products like sweet potatoes, corn, poultry, and hogs. Additionally, North Carolina has a growing sector of tech and biotech from the research triangle in Raleigh/Durham/Chapel Hill! This endorsement is the doorway to new opportunities. You may be asking yourself, “How can I best prepare for the test?”
Looking online will quickly become dizzying due to all the information available. What you need is a systematic, focused approach —and that’s precisely what our online North Carolina CDL Double/Triple Trailers practice test offers. Up to date as of January 2025, there are 20 multiple-choice questions that resemble what you will face at the DMV on test day!
If a Tar Heel misses a free throw, they know immediately what went wrong. They don’t have to wait until the review at the end of the game to learn. Our practice test works the same way, providing immediate feedback on each answer in real time. If you miss your shot, you’ll see right away why a different response is correct. Once you’ve studied, practiced with our free tests, and feel ready to roll (pun intended!), simply apply at the DMV, bring your documents, pay the fee, pass the test, and jumpstart your transport 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 NC 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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