Free Oklahoma CDL Practice Tests — Your Complete Study Guide
Pass your Oklahoma CDL permit exam with 80%+ on the first try
What You Need to Study
General Knowledge
The foundation of your CDL exam. Covers traffic laws, safe driving techniques, vehicle inspection procedures, cargo handling, and federal regulations every commercial driver must understand.
Combination Vehicles
Essential for driving tractor-trailers. Covers coupling and uncoupling procedures, rollover prevention, inspecting combination vehicles, and safely maneuvering with attached trailers.
Air Brakes
Required for any vehicle equipped with air brakes. Covers how air brake systems work, dual air brake systems, inspecting air brakes, and using them safely in all conditions.
Endorsement Tests
HazMat
Required for transporting hazardous materials. Covers placarding, labeling, loading procedures, emergency response, and compliance with federal hazmat regulations.
Tanker
Required for driving tank vehicles used to transport liquids or gases in bulk. Covers safe loading, unloading, and driving techniques specific to tanker operations.
Doubles & Triples
Required for pulling double or triple trailers. Covers coupling and uncoupling multiple trailers, safe driving practices, and inspection procedures for multi-trailer rigs.
Passenger
Required for operating vehicles designed to transport 16 or more passengers. Covers passenger safety, loading, emergency exits, and pre-trip inspection requirements.
What Are You Preparing For?
Select one or more options so we can show you exactly which tests you need to take.
What You Need to Study
General Knowledge
16 sections · 800 questions
The foundation of your CDL exam. Covers traffic laws, safe driving techniques, vehicle inspection procedures, cargo handling, and federal regulations every commercial driver must understand.
Combination Vehicles
9 sections · 180 questions
Essential for driving tractor-trailers. Covers coupling and uncoupling procedures, rollover prevention, inspecting combination vehicles, and safely maneuvering with attached trailers.
Air Brakes
6 sections · 150 questions
Required for any vehicle equipped with air brakes. Covers how air brake systems work, dual air brake systems, inspecting air brakes, and using them safely in all conditions.
Endorsement Tests
Additional endorsements you may need depending on the type of vehicle or cargo you plan to operate.
HazMat
9 sections · 202 questions
Required for transporting hazardous materials. Covers placarding, labeling, loading procedures, emergency response, and compliance with federal hazmat regulations.
Tanker
6 sections · 133 questions
Required for driving tank vehicles used to transport liquids or gases in bulk. Covers safe loading, unloading, and driving techniques specific to tanker operations.
Doubles & Triples
7 sections · 144 questions
Required for pulling double or triple trailers. Covers coupling and uncoupling multiple trailers, safe driving practices, and inspection procedures for multi-trailer rigs.
Passenger
6 sections · 123 questions
Required for operating vehicles designed to transport 16 or more passengers. Covers passenger safety, loading, emergency exits, and pre-trip inspection requirements.
Your Path to a Commercial Driver's License
To get a CDL, you must first study for and pass the permit exam at the DMV. After you receive your permit, you can take commercial vehicle driving classes and complete the required training. The final step is passing the official driving exam to earn your CDL. Our practice tests help you prepare for the DMV permit exam with real-style questions, and we also provide extra study materials and helpful resources to guide you through the process.
To obtain a CDL in Oklahoma, you must pass three written permit tests — General Knowledge, Combination Vehicles, and Air Brakes — at the Oklahoma Department of Motor Vehicles. Similar to a regular driver's license permit exam, these are timed, multiple-choice tests based on the official Oklahoma CDL handbook.
All of our practice material is built from the official Oklahoma CDL handbook and federal resources, and curated by professionals with over 10 years of experience in the commercial transportation industry. Studying with practice tests that mirror the real exam format is one of the most effective ways to pass on your first try.
On this page you'll find free practice tests for all three sections. For the full question bank and additional study features, download the CDL Help app.
CDL Requirements in Oklahoma
- To obtain a Commercial Driver License (CDL) in Oklahoma, you must meet the following eligibility requirements:
- Must be at least 18 years old for intrastate (within Oklahoma) CDL with a "K" (intrastate only) restriction.
- Must be at least 21 years old for unrestricted CDL including interstate commerce.
- Must provide proof of Oklahoma domicile/residency (1 valid proof for standard; 2 valid proofs for REAL ID-compliant CDL).
- U.S. Citizens must provide Social Security Number. Lawful Permanent Residents must present valid, unexpired Permanent Resident Card.
- Must self-certify into one of four medical categories: NI (Non-Excepted Interstate — DOT Medical Card required), EI (Excepted Interstate), NA (Non-Excepted Intrastate), EA (Excepted Intrastate).
- After passing CDL vision and written knowledge test at a Service Oklahoma Licensing Office, applicants receive paperwork to take to a Licensed Operator who prints the CLP.
- CLP must be held for 14 full days (not counting day of issuance) before CDL skills/drive test. Skills test may be taken on the 15th day.
- ELDT required for all first-time CDL applicants through FMCSA-registered Training Provider Registry. ELDT Completion Certificate required before skills test. Not required for removing air brake or automatic transmission restrictions.
- CDL Classes: Class A (GCWR 26,001+ lbs, towed vehicle over 10,000 lbs), Class B (single vehicle GVWR 26,001+ lbs), Class C (16+ passengers or hazmat placarding).
- Endorsements: H (Hazmat — written test + TSA background check at every renewal), N (Tank Vehicle), P (Passenger — written + skills test), S (School Bus — written + skills test, must also hold P), T (Double/Triple Trailers), X (Tank + Hazmat combo).
- Retests: additional $4.00 charge for all retests (written or drive).
- CDL renewal available if valid or not expired more than 3 years. If expired more than 3 years, must apply as new CDL applicant. Hazmat endorsement holders must retake written test and TSA background check at every renewal.
- CDL can be renewed online.
Official Oklahoma CDL Handbook
The official Oklahoma CDL Driver's Manual covers every topic tested on the state's CDL knowledge exam — but it reads like a dense reference manual, not a structured study guide. A more effective way to prepare is with our General Knowledge practice tests. Our free Oklahoma CDL permit practice test mirrors the format and content of the official exam and is fully up to date as of February 2026. Each practice test features 20 questions covering essential topics such as vehicle inspection, safe driving techniques, air brakes, cargo securement, driving emergencies, hazardous conditions, and Oklahoma-specific commercial driving regulations. Unlike the official test, every practice question comes with a helpful hint and a detailed explanation of the correct answer — so you actually learn from every question you answer.
- Complete CDL regulations and Oklahoma-specific requirements
- Safe driving techniques, vehicle inspection, and cargo handling
- All endorsement categories and testing requirements
Non-Domiciled CDL Information
Important information about non-domiciled commercial driver's licenses in Oklahoma.
Federal regulations on non-domiciled CDLs are changing rapidly. The information below reflects the latest known state actions.
Oklahoma has an official Standard Operating Procedure (SOP B.06) for Non-Domicile and Custom Harvester CDL Eligibility (updated March 7, 2025). The minimum age for non-domiciled CDL applicants is 17 years old. No proof of domicile is required for non-domicile applicants. Accepted immigration documents include an unexpired Employment Authorization Document (EAD) issued by USCIS, or an unexpired foreign passport with an approved I-94 form. Oklahoma also issues CDLs to Custom Harvesters (agricultural workers who travel between states for harvest work) under this same SOP. No public record was found indicating Oklahoma was subject to an FMCSA corrective action plan. Under the FMCSA final rule published on February 13, 2026, eligibility for non-domiciled CLPs and CDLs is limited to foreign-domiciled individuals holding H-2A, H-2B, or E-2 visa statuses. Oklahoma may continue issuing non-domiciled CDLs under its existing procedures while complying with the updated federal requirements.[oklahoma][FMCSA Final Rule]
English Language Proficiency (ELP)
Federal ELP enforcement applies to all CDL holders nationwide.
Federal ELP enforcement applies to all CDL holders nationwide. Here is how it is enforced in Oklahoma.
Oklahoma does not currently administer a separate state-level English Language Proficiency (ELP) test for CDL applicants. However, all Oklahoma CDL holders are subject to federal ELP enforcement, which took effect on June 25, 2025. Under this enforcement, roadside inspectors conduct a two-step assessment: first, a conversational interview in English — no interpreters or translation tools are permitted — to evaluate whether the driver can communicate sufficiently in English; second, the driver must demonstrate the ability to read and interpret standard U.S. traffic signs. Drivers who fail either step of the assessment are placed out of service under CVSA guidelines. Oklahoma CDL applicants should be prepared to demonstrate English proficiency during any roadside inspection or compliance review.