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  • 0  (6 mistakes allowed to pass)

Free ID CDL Diagnostic Test 2025

Average pass rate for CDL tests in Idaho: 69%.
Average pass rate for this test: 37%.
Hard
5 min
Score distribution:
90-100=>0%
80-89=>3%
70-79=>8%
60-69=>30%
<60%=>59%
Avg. first-try score: 43%

To get a rough idea of how much you know about commercial driving rules in Idaho, try our ID 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!

Free ID CDL Diagnostic Test 2025
ID commercial driver's license
Based on the official ID CDL HandbookHandbook‑based (2025) + exam‑taker feedback
5 ID students practicing now
•58completed today

Accuracy & authorship

Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

Reviewed for legal and handbook accuracy:

Steven Litvintchouk

M.S., Chief Educational Researcher (ACES member)

Last verified for accuracy on

Andrei Zakhareuski, Co-founder & CEO at Driving-Tests.org

Test design and learning experience oversight:

Andrei Zakhareuski

Co-founder & CEO, Driving-Tests.org

Questions are created and maintained by the Driving-Tests.org content team following our multi-layer editorial process and updated whenever the Idaho DMV changes its handbook or website information.

Official sources we check: Idaho CDL Handbook (2025 edition), Idaho DMV website

How to use this practice test

  1. Start here. One of 4 free Idaho tests. ~5 min. Read explanations as you go.
  2. Cover more ground. All tests have different questions - no repeats.
  3. Finish strong. Try the Exam Simulator for a full-length run.

Why this works

  • Exam-like questions from the current handbook + real test-taker patterns. Explanations cite the manual.
  • AI Assistant explains tricky items in plain language.
  • Performance Insights show your weak topics and what to study next.
  • Challenge Bank™ saves your mistakes for targeted practice.

Actual DMV permit test: What to expect?

The Idaho permit test has 50 questions. You must get 40 correct (80%) to pass.
  • Where: Any Idaho DMV office (find locations)
  • Bring: ID + SSN + residency proof + permit/license fee (see checklist)
  • If you fail: Retake after 3 days.
  • Commonly missed: speed limits on highways, city streets, and residential areas, emergency vehicle right-of-way.
  • Ready to schedule? Book your ID DMV appointment

Real Idaho drivers who passed first try

Verified student reviews • Shared with permission

I took air breaks,tanker,coupling and cdl test and passed them all.
i took air breaks ,tanker ,coupling and cdl test and passed them all . then i took my driving test passed it as well.
D
I passed my hazmat,missed 1 first try.
I passed my hazmat,missed 1 first try. but tanker I took needs to do again there were question on test that I did not know. all and all awesome program to use for any DMVtesting. ty
RR
Couldn't be happier!
I was a little sceptical when I first learned of this website while searching for some information regarding CDL testing on Google. I downloaded a current PDF drivers manual from the DMV website, and read the information I needed in its entirery. I felt fairly confident by this point already, but after going through all the practice tests and flash cards on the site I could answer the questions without even thinking. I was sure once I got to the DMV to take the actual tests that the questions were going to be flipped around and worded completely different but to my surprise and relief they weren't! I passed the three tests that I had studied for with the help of driving-tests.org flawlessly. I honestly couldn't be happier with my results. Incase you haven't realized by this point, I would definitely recommend this website for your CDL test taking needs. C.
C
I came into CDL/CLP realm with NO prior….
I came into CDL/CLP realm with NO prior experience of the material. Tried it twice, back to back, failed both times. I got this, spent a whole day doing the practice tests, marathons, ect. Took my tested today, passed with a 95%. 10/10 would recommend to anyone! Well if you really invest your time into the material! Thank you for this!
AA

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