Free Ohio CDL Practice Tests — Your Complete Study Guide
Pass your Ohio CDL permit exam with 80%+ on the first try
Updated: June 2026
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.
Free Ohio CDL Practice Tests — Your Complete Study Guide
What should you do when merging?
- Merge at a much lower speed than the flow of traffic.
- Use your mirrors to make sure the gap in traffic is large enough for you to enter safely.
- Merge without signaling.
Documents related to hazardous materials transportation must be stored ___.
- In the pouch of the driver door.
- Attached to the sun visor.
- In a box on the trailer.
Which of these statements about driving through a tunnel is correct?
- Keep windows open for fresh air.
- Turn off all lights inside the truck.
- There may be strong winds when exiting.
Among these vehicles, which is more likely to experience off-tracking during turns?
- Tractor with 45-feet trailer.
- 28-feet box truck
- 45-feet straight truck
Under what circumstances should you sound your horn?
- If it helps to avoid a crash.
- To let others know you are running late.
- To say hello to a friend on the sidewalk.
Identify the incorrect statement regarding alcohol consumption.
- A drinker can control how fast his or her body absorbs alcohol.
- Alcohol goes directly from the stomach to the blood stream.
- BAC is determined by how fast you drink; how much you drink and how much you eat.
If your vehicle is missing ____ or more leaves from any leaf spring, it won't be allowed to be used.
- 1/3
- 1/4
- 1/2
Select the correct statement regarding the transportation of hazardous materials.
- Any truck carrying any amount of hazardous materials must have placards.
- Hazardous materials can be disposed of in regular trash bins if the containers are sealed.
- All hazardous materials present health and safety danger.
To figure out how much alcohol is in someone's blood (BAC), you need to know:
- Their height.
- The time of day they drink alcohol
- Their weight.
What is the right way to hold a steering wheel?
- With one hand on the top of the wheel and the other on your lap.
- With your knees, while using your hands to adjust the radio.
- With both hands, on opposite sides of the wheel.
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 Ohio, you must pass three written permit tests — General Knowledge, Combination Vehicles, and Air Brakes — at the Ohio Department of Motor Vehicles. Similar to a regular driver's license permit exam, these are timed, multiple-choice tests based on the official Ohio CDL handbook.
All of our practice material is built from the official Ohio 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.
Ohio CDL Knowledge Test: Format & Requirements
The CDL knowledge (written) test follows the same federal standards in Ohio as nationwide. Here's what to expect.
Questions by test
Passing score, question counts, and test format are federal standards (FMCSA, 49 CFR Part 383). Always confirm current details with your state's official CDL handbook.
Ohio CDL Fees & Licensing
State-charged fees as of June 2026. Amounts change — confirm current fees with the official agency.
CDL Requirements in Ohio
- Must be at least 18 years old and possess a valid Ohio driver's license to apply for a CDL for intrastate (within Ohio) commercial driving.
- Must be at least 21 years old to drive a commercial motor vehicle in interstate commerce (across state lines) or to transport hazardous materials.
- Must obtain an Ohio Commercial Learner's Permit (CLP) at least 14 days before taking the CDL skills exam. A CLP is valid for 12 months, and a CLP holder may only operate a commercial motor vehicle on public roads when accompanied by a properly endorsed CDL holder.
- Must pass a physical examination conducted by a certified medical examiner, including vision and hearing tests and screening for medical conditions that could impair driving ability.
- All CDL holders must self-certify their type of driving into one of four categories: Interstate Non-Excepted, Interstate Excepted, Intrastate Non-Excepted, or Intrastate Excepted — each with different federal or state medical requirements.
- Must pass all applicable knowledge tests: General Knowledge, Air Brakes (if applicable), Combination Vehicles (Class A), and any endorsement-specific exams.
- Must pass skills tests including Pre-trip Vehicle Inspection, Basic Vehicle Control, and On-road Driving.
- Entry Level Driver Training (ELDT) is required for applicants obtaining a Class A or Class B CDL for the first time, upgrading from Class B to Class A, or obtaining a School Bus (S), Passenger (P), or Hazmat (H) endorsement for the first time.
- Must disclose all states where you held a driver's license in the past 10 years and surrender any out-of-state CDL.
- CDL classes available: Class A (combination vehicles 26,001+ lbs GCWR), Class B (single vehicles 26,001+ lbs GVWR), Class C (vehicles transporting 16+ passengers or hazmat under 26,001 lbs).
Official Ohio CDL Handbook
The official Ohio Commercial Driver's License Manual covers every topic tested on the state's CDL knowledge exam — but its dense, reference-style format makes it difficult for self-study. A more effective preparation tool is our set of General Knowledge practice tests. Our free Ohio CDL permit practice test is structured to closely match the format and content of the official exam and is fully updated as of February 2026. Each test includes 20 questions covering critical topics such as vehicle inspection, safe driving techniques, air brakes, cargo securement, driving emergencies, hazardous conditions, and Ohio-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 learn from every question, not just the ones you get right.
- Complete CDL regulations and Ohio-specific requirements
- Safe driving techniques, vehicle inspection, and cargo handling
- All endorsement categories and testing requirements
CDL Practice Tests in Nearby States
Testing near Ohio? Practice for a neighboring state's CDL exam too.
Non-Domiciled CDL Information
Important information about non-domiciled commercial driver's licenses in Ohio.
Federal regulations on non-domiciled CDLs are changing rapidly. The information below reflects the latest known state actions.
Ohio has ceased all issuance and testing for Non-Renewable/Non-Transferrable CDLs. The Ohio BMV has instructed all local licensing agencies and testing facilities to stop processing any non-domiciled CDL transactions — including duplicates, changes, upgrades, renewals, and new issuances of Non-Renewable/Non-Transferrable CDLs and CLPs. Ohio is currently reviewing its non-domiciled CDL program for non-compliance with established federal law and has not announced a date to resume issuance.
This action aligns with the FMCSA final rule published on February 13, 2026 (effective March 16, 2026), which limits eligibility for non-domiciled CLPs and CDLs to foreign-domiciled individuals holding specific, verifiable employment-based nonimmigrant statuses — specifically H-2A (agricultural workers), H-2B (non-agricultural workers), and E-2 (treaty investors) visa holders. Employment Authorization Documents (EADs) are no longer accepted as proof of eligibility, and State DMVs must use the federal SAVE database to confirm immigration status. This rule aligns the issuance of non-domiciled CDLs with FMCSA's statutory mandate to ensure the fitness of all CMV drivers, restoring the integrity of the CDL system and enhancing public safety.[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 Ohio.
Ohio does not currently administer a separate state-level English Language Proficiency (ELP) test for CDL applicants. However, Ohio CDL holders are fully subject to federal ELP enforcement, which took effect on June 25, 2025. Under FMCSA guidance, all roadside inspections must begin in English, and if the driver appears unable to understand or respond appropriately, the officer proceeds with a formal English Proficiency Assessment — a conversational interview in English (no interpreters or translation tools allowed), followed by a highway traffic sign recognition test. Drivers who fail are placed out of service under CVSA North American Standard Out-of-Service Criteria. Notably, Ohio has seen significant percentage spikes in ELP violations since enforcement was reinstated, reflecting heightened federal scrutiny on English proficiency compliance among commercial drivers operating in the state.