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Advertisement

Free NH CDL Diagnostic Test 2025

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements.

To get a rough idea of how much you know about commercial driving rules in New Hampshire, try our NH CDL diagnostic test. It contains 30 multiple-choice questions on a variety of topics in commercial driving: air brakes, hazardous materials, buses, combination vehicles, and tanker trucks. This test will help you quickly identify gaps in your knowledge of commercial driving, which will be especially useful if you’re just starting to prepare for the CDL knowledge exams. Each practice question includes a picture and has four possible answers. Choose the most complete and correct answer for each question. Each question also comes with an optional hint if you need it and an explanation of the correct answer. Try our CDL diagnostic test and see whether you are ready for the real thing. Good luck, and drive safely!

Real exam-style pitfalls you’ll practice:
Common Traps
Distractors
Trick Wording
Double Negatives
Free NH CDL Diagnostic Test 2025
Commercial Driver's License
Based on official NH exam questions
Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

Authored and fact-checked by Steven Litvintchouk, M.S.

Chief Educational Researcher, Driving‑Tests.org (ACES member)
Verified for accuracy November 2025
Methodology & Editorial Policy

5 min to complete
Available in EN and ES

What to expect on the actual NH permit test

50

questions

40

correct answers to pass

80%

passing score

Real New Hampshire drivers who passed first try

Verified student reviews • Shared with permission

I was turned away from the NH DMV because I needed ELDT training.
I was turned away from the NH DMV for a CDL C with Hazmat Endorsement because I needed ELDT training. I was super annoyed that I had to do this. Upon starting the courses, I learned it was a bunch more studying of the CDL Manual. I only studied what I thought was applicable to CDL C on my own. This prepared me way more than expected and thanks to driving-tests.org I learned a LOT and passed my CDL C and Hazmat Exams first try! I sent my brother a link and he signed up on this site as well. Anyone looking to be fully prepared to take a CDL exam or endorsement exams, I Highly recommend this site.
S
Easily passed the CDL Class A knowledge test.
I easily passed the CDL Class A knowledge test! The training material was incredibly helpful and the practice test questions were nearly identical to the actual exam. There is no reason to look anywhere else for training for your CDL knowledge tests!
C
The process was very easy to get….
The process was very easy to get started. It was step by step all the way through. I passed hazmat and tanker first try within just 2 days of using the software.
TT
This program gave me all the tool….
This program gave me all the tool necessary to pass my hazmat and tankers endorsement tests. I was able to study and take the practice tests over and over right up to the morning of my tests and I passed on the very first try. I would highly recommend this program to anyone looking to obtain any kind of CMV license or endorsements. Thanks again to Driving-Tests
Q
Thanks!
Most of the questions here are on the actual test, however the real exam has trickier questions in which multiple answers shown would be correct. Instead of being able to select all of the above they are looking for 1 specific answer. This should be reflected for realism on some of the questions and tests presented here. Also I encountered a question about turns with turn lane 1 and 2 presented at an intersection, or turning from a 4 lane Hwy to a 2 lane divided hywy. I passed all of the tests i.e. general knowlege at 40 out of 50 (due to trickier questions), air brakes 100% and combination vehicles 100%. The air brakes exam and the combination vehicles exam was just as presented in the testing practice package. Passing the tests and obtaining my cdl learners permit in a short amount of time should show the true power of this method of learning.
JR
Really great explanation!
Great service! I bought 7 days for ELDT CDL A theory, just for learning and certification of ELDT. There is a video course with good pictures and voice in same time. And you can download the PDF for own it. After theory you must have finished testing marathon about 700 questions with 100% right. This marathon organized so cool. You don't need remember any wrong answers because they are saving for answering again later. After marathon you mast do exam. I did with 92% right. Awesome. But I did mistake about my schedule for study and I had to pay again for 7 days to save my progress and finish studying. You have to be accurate with it and will plan your study smarter than me. There is about 12 hrs of video and after that marathon with 700 questions. It may be necessary 5-7 full days of study. Or you can pay in advance for 30 days study. It's cost no to much. After exams they automatically send you certificate and data to TPR (DMV also) and you can check immediately. Thanks for a great service! I will recommend you!
DS

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