Free Ohio CDL Practice Tests 2025

• CDL Types: Class A, B, and C with various endorsements
• Testing Fee: $42.00 (knowledge test fee is bundled with permit fee)
• Languages: English only
• Test Format: Computer-based multiple-choice questions
• Passing Score: 80% on all knowledge tests
• Retesting Timeframe: Next day for knowledge tests, 2-day wait for skills tests
• CLP Validity: 12 months (no renewals; must retest after expiration)
• Required Documentation: Valid DOT medical card, Ohio residency proof, Social Security card
• ELDT Requirement: Beginning February 7, 2022: First-time CDL applicants must complete Entry Level Driver Training before taking skills tests for Class A or B CDL, or knowledge tests for certain endorsements

The Ohio CDL knowledge test evaluates your understanding of commercial vehicle regulations, safe driving practices, and traffic laws. This test is required to obtain a Commercial Learner's Permit (CLP), which you must have before taking the skills test for a full CDL. The computer-based exam covers federal transportation regulations and Ohio-specific rules to ensure you have the knowledge necessary to operate commercial vehicles safely in Ohio and across state lines.

In Ohio, you must take the CDL knowledge test if:

• You are applying for your first Commercial Learner's Permit
• You want to add endorsements to your current CDL
• You are upgrading your license class (e.g., from Class B to Class A)
• Your CDL has been expired for over one year
• You are transferring a CDL from another state and adding new endorsements

Everyone must take the general knowledge test and specific endorsement tests for specialized operations such as Passenger (P), School Bus (S), Tank Vehicles (N), Hazardous Materials (H), or Doubles/Triples (T).

The CDL knowledge test serves as a crucial safety measure to ensure commercial drivers possess the necessary knowledge to operate vehicles safely, follow safety protocols, and comply with regulations. Commercial vehicles present higher risks on roadways due to their size, weight, and sometimes hazardous cargo. This test verifies that you understand safety practices, emergency procedures, and technical knowledge before operating these vehicles.

Ohio's CDL knowledge test combines Federal Motor Carrier Safety Administration (FMCSA) standards with state-specific regulations. This ensures Ohio CDL holders meet national qualification standards while also complying with state requirements. The test covers vehicle operation, air brake systems, combination vehicle handling, and endorsement-specific knowledge. This standardized approach means your Ohio CDL is valid for commercial vehicles nationwide, provided you meet other requirements such as minimum age for interstate driving.

Ohio CDL knowledge tests have varying numbers of questions:

• General Knowledge: 50 multiple-choice questions
• Air Brakes: 25 multiple-choice questions
• Combination Vehicles: 20 multiple-choice questions
• Passenger Endorsement: 20 multiple-choice questions
• School Bus Endorsement: 20 multiple-choice questions
• Hazardous Materials Endorsement: 30 multiple-choice questions
• Tank Vehicles Endorsement: 20 multiple-choice questions
• Doubles/Triples Endorsement: 20 multiple-choice questions

Each question has 4 answer options to evaluate your knowledge of vehicle safety procedures, regulatory compliance, and technical knowledge.

Sample question: When inspecting your coupling devices, you should verify that:

• The fifth wheel is positioned directly above the kingpin
• There is no space between the upper and lower fifth wheel
• The release arm is in the unlocked position
• The trailer apron rests at least 6 inches above the fifth wheel

Answer: B) There is no space between the upper and lower fifth wheel

To pass any Ohio CDL knowledge test, you must score 80% or higher:

• General Knowledge: 40 out of 50 questions
• Air Brakes: 20 out of 25 questions
• Combination Vehicles: 16 out of 20 questions
• Passenger Endorsement: 16 out of 20 questions
• School Bus Endorsement: 16 out of 20 questions
• Hazardous Materials Endorsement: 24 out of 30 questions
• Tank Vehicles Endorsement: 16 out of 20 questions
• Doubles/Triples Endorsement: 16 out of 20 questions

Each test is scored independently, so if you pass some tests but fail others, you only need to retake the tests you failed.

Ohio CDL knowledge tests are offered in English only. This requirement aligns with federal regulations that require commercial drivers to read, write, and speak English well enough to understand traffic signs, complete required records, respond to official inquiries, and communicate with the public and authorities. No exceptions are given to this language requirement for CDL testing in Ohio.

Study aids are strictly prohibited during Ohio CDL knowledge tests. You may not use:

• Reference materials, including CDL manuals
• Notes, flashcards, or cheat sheets
• Electronic devices of any kind
• Calculators (unless permitted for specific questions)
• Cell phones or smart watches

Testing facilities monitor examinees closely, and using unauthorized materials will result in immediate test termination and possible disqualification from future testing.

Ohio BMV doesn't impose time limits for CDL knowledge tests. Most applicants complete the general knowledge portion in 60-90 minutes, while endorsement tests typically take 30-45 minutes each. If you're taking multiple tests, plan your visit accordingly.

Applicants with documented learning disabilities or other special needs may request reasonable accommodations with proper supporting documentation.

Ohio offers several CDL knowledge tests for different commercial driving needs:

• General Knowledge (required for all CDL applicants)
• Air Brakes (required for vehicles with air brake systems)
• Combination Vehicles (required for Class A CDL)
• Passenger Endorsement (P)
• School Bus Endorsement (S)
• Doubles/Triples Endorsement (T)
• Tank Vehicles Endorsement (N)
• Hazardous Materials Endorsement (H)

You only need to take the tests for the types of commercial driving you plan to do.

Sample question: What happens during "brake lag" when using air brakes?

• The time needed for worn brake pads to engage the drum
• The time required for compressed air to flow through the lines when brakes are applied
• The delay between moving your foot from accelerator to brake pedal
• The time it takes for the parking brake to fully engage

Answer: B) The time required for compressed air to flow through the lines when brakes are applied

General Knowledge: Vehicle inspection procedures, basic control techniques, shifting practices, visual search methods, night driving, extreme weather operation, emergency protocols, accident response, and introductory hazardous materials information.

Air Brakes: Air brake system components, dual air brake operation, inspection procedures, usage in various conditions, emergency braking, system failure response, and brake lag/fade.

Combination Vehicles: Coupling/uncoupling processes, inspection requirements, handling characteristics, rollover prevention strategies, jackknife avoidance, turning methods, and backing techniques.

Passenger (P): Passenger management, loading/unloading procedures, emergency exit operation, accessibility compliance, disruptive passenger handling, and special crossing requirements.

School Bus (S): Student loading/unloading safety, emergency evacuation procedures, school zone operations, railroad crossing protocols, student behavior management, danger zone awareness, and specialized equipment operation.

Doubles/Triples (T): Coupling/uncoupling multiple trailers, unique handling characteristics, specialized inspection requirements, corrective actions for handling problems, and operation during adverse conditions.

Tank Vehicles (N): Liquid surge effects, weight distribution principles, differences between baffled and unbaffled tanks, loading/unloading procedures, and specialized braking techniques for partially filled tanks.

Hazardous Materials (H): Hazardous materials classification, identification methods, documentation requirements, loading/unloading protocols, driving regulations, emergency response procedures, and security awareness.

To prepare for the Ohio CDL knowledge test:

• Study the Ohio CDL Manual sections relevant to your license class and endorsements
• Take our practice tests to assess your knowledge
• Create a multi-week study plan instead of cramming
• Make flashcards for technical terms and complex concepts
• Focus on challenging sections like air brakes and hazardous materials
• Memorize pre-trip inspection sequences and procedures
• Learn Ohio-specific regulations and requirements
• Study vehicle systems and component functions
• Familiarize yourself with all required documentation

Consistent, structured study over several weeks is more effective than cramming. Many test-takers underestimate the technical depth required, especially for endorsements.

Yes, our practice tests for Ohio CDL preparation are available. Our free practice tests offer:

• Knowledge gap identification
• Confidence building through practice
• Realistic test simulation
• Progress tracking
• Detailed explanations for correct and incorrect answers
• Familiarity with question styles and formats

Our practice tests that mirror current Ohio testing standards for all CDL classes can significantly improve first-time pass rates by familiarizing you with question formats and identifying knowledge gaps before the actual test.

To pass the Ohio CDL knowledge test:

• Start studying at least 2-3 weeks before your test
• Focus on understanding concepts rather than memorizing isolated facts
• Use our practice tests to pinpoint and strengthen weak knowledge areas
• Get enough rest the night before your test
• Eat well before testing to stay focused and energized
• Read each question and all answer options completely
• Pay attention to words like "always," "never," or "except"
• When unsure, choose answers that emphasize safety
• Review your answers before submission if the system allows
• Stay calm and focused during the test

Sample question: When using turn signals, you should:

• Signal only when you see other vehicles nearby
• Signal at least 100 feet before making your turn
• Begin signaling as you start your turning maneuver
• Use signals only for lane changes, not turns

Answer: B) Signal at least 100 feet before making your turn

Our practice tests mirror the Ohio CDL knowledge test in format, difficulty, and content coverage, though specific questions will differ. These practice assessments help you:

• Become familiar with question phrasing and formats
• Understand the depth of content coverage
• Develop effective time management skills
• Build critical thinking abilities essential for test success

While practicing, focus on understanding underlying principles rather than memorizing specific answers, as the actual test draws questions from an extensive bank, and each test presents a unique question set.

CDL knowledge tests are administered at designated Ohio Bureau of Motor Vehicles (BMV) examination stations that offer commercial licensing services. Not every BMV location provides CDL testing, so verify testing availability before visiting. Testing locations include major cities like Columbus, Cleveland, Cincinnati, Toledo, Akron, Dayton, and other regional centers throughout Ohio.

To find the nearest location that offers CDL testing, visit the Ohio BMV website.

Appointments are strongly recommended for Ohio CDL knowledge tests. Schedule your test through:

• Ohio BMV's online appointment system at bmv.ohio.gov
• Calling your local BMV testing facility directly

While some locations might accommodate walk-in testing if space permits, wait times can be extensive, and you risk being turned away if daily testing capacity is reached. Scheduling an appointment guarantees your testing slot and minimizes waiting time.

No, Ohio CDL knowledge tests must be completed in person at authorized BMV testing facilities. This requirement ensures test security, proper identity verification, and controlled testing conditions. Federal regulations mandate in-person testing for all states to prevent fraudulent test-taking and ensure the license applicant personally demonstrates the required knowledge. Remote or online testing is not available for any CDL examination in Ohio.

Before your CDL knowledge test, gather these required items:

• Current, valid Ohio driver's license
• Social Security card or verification of your SSN
• Proof of U.S. citizenship or lawful permanent residency (birth certificate, U.S. passport, permanent resident card)
• Two documents proving Ohio residency with your name and address
• Current DOT Medical Examiner's Certificate (Form MCSA-5876)
• Completed CDL application form
• Payment for applicable fees
• Hazardous Materials endorsement applicants: additional identification for TSA background check

Additional items to consider:

• Prescription eyeglasses if needed for reading
• Appointment confirmation

All documentation must be original or certified copies; photocopies will not be accepted. For more detailed information about required documents, visit the Ohio BMV CDL Information page.

Plan to arrive at the testing center 15-20 minutes before your scheduled appointment to allow time for:

• Document processing and verification
• Application review and completion
• Fee payment processing
• Check-in procedures

First-time applicants should consider arriving 30 minutes early to handle additional paperwork requirements. Late arrivals risk having to reschedule their test. Consider potential traffic delays and parking limitations at BMV facilities when planning your arrival time.

After passing the required knowledge tests, you'll receive your Commercial Learner's Permit (CLP) with these restrictions:

• Valid for 12 months from issue date
• 14-day waiting period before skills test eligibility
• Must be supervised by a qualified CDL holder in the passenger seat
• No passenger transport (except authorized individuals like trainers or examiners)
• No hazardous materials transport
• May have additional restrictions based on endorsements and vehicle type

Your CLP will show all endorsements you passed, what vehicles you can practice with, and what operations are restricted.

Your Ohio Commercial Learner's Permit allows you to:

• Practice driving commercial vehicles under supervision of a qualified CDL holder
• Develop skills for the three-part CDL skills test
• Get experience with the specific vehicle class you'll be driving professionally
• Become familiar with commercial vehicle handling and operations

This supervised practice period is crucial to develop the skills needed to pass the skills test and drive commercial vehicles safely.

Knowledge test scores are valid for 12 months, the same as your CLP. If your CLP expires before you take your skills test, you'll need to retake all knowledge tests to get a new permit. Ohio doesn't offer score extensions, so plan your testing timeline carefully to avoid retaking knowledge tests. This ensures your knowledge is current when you get your full CDL.

If you don't pass one or more knowledge tests:

• You can retest the next business day
• You only need to retake the tests you failed
• Practice tests can help you target problem areas
• Review incorrect answers to identify knowledge gaps
• Consider alternative study methods if you're struggling with certain topics

Ohio doesn't limit how many times you can take the tests, but repeated failures indicate you need more preparation.

Sample question: After failing a CDL knowledge test section, when can you retest?

• After a 30-day waiting period
• Immediately at a different BMV location
• The next business day
• You must retake all test sections, even those you passed

Answer: C) The next business day

After getting your CLP and waiting 14 days:

• Schedule your skills test through Ohio’s BMV website or by phone
• Verify your CLP is still valid and your medical certificate is current
• Get a test vehicle for the class of CDL you want
• Pay the skills test fee ($42.00)
• Choose a testing date and time

Note: Skills tests are often held at different locations than knowledge tests. The three-part skills test includes pre-trip inspection, basic vehicle control exercises, and on-road driving evaluation. Make sure you're prepared for all three before scheduling.