Free OK CDL Diagnostic Test 2025

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

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

5 min to complete

Available in EN and ES

Pass the first time,
guaranteed with Premium

All 650 exam-like questions
specific to your state

Interactive learning with
AI personal tutor

Unique 360° Virtual Road
Simulations

Get your money back if you
don’t pass

What to expect on the actual OK SOK exam

questions

correct answers to pass

80%

passing score

Helpful links

OK DMV website

Official Oklahoma CDL manual (2025)

More OK SOK Written Exam Resources

Are you in another state?

Alabama: Test 1 / Test 2
Alaska: Test 1 / Test 2
Arizona: Test 1 / Test 2
Arkansas: Test 1 / Test 2
California: Test 1 / Test 2
Colorado: Test 1 / Test 2
Connecticut: Test 1 / Test 2
Delaware: Test 1 / Test 2
District of Columbia: Test 1 / Test 2
Florida: Test 1 / Test 2
Georgia: Test 1 / Test 2
Hawaii: Test 1 / Test 2
Idaho: Test 1 / Test 2
Illinois: Test 1 / Test 2
Indiana: Test 1 / Test 2
Iowa: Test 1 / Test 2
Kansas: Test 1 / Test 2
Kentucky: Test 1 / Test 2
Louisiana: Test 1 / Test 2
Maine: Test 1 / Test 2
Maryland: Test 1 / Test 2
Massachusetts: Test 1 / Test 2
Michigan: Test 1 / Test 2
Minnesota: Test 1 / Test 2
Mississippi: Test 1 / Test 2
Missouri: Test 1 / Test 2
Montana: Test 1 / Test 2
Nebraska: Test 1 / Test 2
Nevada: Test 1 / Test 2
New Hampshire: Test 1 / Test 2
New Jersey: Test 1 / Test 2
New Mexico: Test 1 / Test 2
New York: Test 1 / Test 2
North Carolina: Test 1 / Test 2
North Dakota: Test 1 / Test 2
Ohio: Test 1 / Test 2
Oklahoma: Test 1 / Test 2
Oregon: Test 1 / Test 2
Pennsylvania: Test 1 / Test 2
Rhode Island: Test 1 / Test 2
South Carolina: Test 1 / Test 2
South Dakota: Test 1 / Test 2
Tennessee: Test 1 / Test 2
Texas: Test 1 / Test 2
Utah: Test 1 / Test 2
Vermont: Test 1 / Test 2
Virginia: Test 1 / Test 2
Washington: Test 1 / Test 2
West Virginia: Test 1 / Test 2
Wisconsin: Test 1 / Test 2
Wyoming: Test 1 / Test 2

Unlock full access with Premium

Our commitment to accuracy and quality in our practice tests

Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.

Written by Andrei Zakhareuski Updated over a week ago

At Driving-Tests.org, we understand the importance of reliable and accurate practice tests to help you prepare for your DMV exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.

Here's an inside look at how we maintain the highest quality in our practice tests.

Content Creation and Verification Process

Alignment with Official Manuals:
Every question we develop is based on the most recent version of each state's official driving manual. Our team regularly monitors each state DMV's website for the latest updates to ensure our practice tests are always aligned with the most current information.
Community Feedback Integration:
We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation.
Expert Content Creation:
Our in-house editor, Steven, who has extensive experience in driver education, crafts each question with precision. He conducts a thorough review of each question against the official manuals to ensure accuracy.
Rigorous Review Process:
Once Steven has finalized a set of questions, our team conducts a joint review session. This second level of scrutiny involves content accuracy, proofreading, and fact-checking to eliminate any errors.
User Feedback Mechanism:
After a question goes live on our site, we keep the lines of communication open. Each question features a feedback button, inviting users to report any issues or errors. This continuous feedback loop allows us to address and rectify any concerns promptly.
Responsive Updates:
In line with our commitment to accuracy, we quickly update our practice questions to reflect any changes in the DMV manuals. Additionally, we update the free electronic copy of the state's driver's license manuals on our site, typically within a few days after the DMV publishes them.

Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your DMV exam.

FREE OK CDL Diagnostic Test

Show Test description

Pass the first time, guaranteed

You test results are ready

Pass Your CDL Exams the First Time – Guaranteed

You’re moments from your results. Before viewing them, see how you can get your ELDT certificate and pass — at a fraction of what schools charge.

1,500 Real Exam‐Like Questions Covers every endorsement plus a Pass Guarantee.
FMCSA‐Approved ELDT Official certification, instant completion reporting.
99.06% Pass Rate vs. 49% Avg Trusted by over 1.15 million drivers to succeed first time.