Free Maryland CDL Practice Tests 2026

• Test Format: Computer-based at Maryland MVA offices
• General Knowledge Test: 50 questions, need 80% to pass
• Permit Validity: 12 months
• Waiting Period: 14 days before skills test
• Languages: English only
• Fees: $25 (Class A/B skills test), $12.50 (Class C skills test)
• Endorsement Fees: Vary by endorsement type
• Retesting: Wait until next business day to retest (after 2nd failure, wait 7 days)

The Maryland CDL knowledge test is a comprehensive assessment of your understanding of commercial driving regulations. You must pass this test to obtain a Commercial Learner's Permit (CLP), which is required before you can take the skills test for a full CDL. The test covers vehicle operation, safety standards, traffic laws, and safe operating procedures.

It's administered electronically at MVA offices throughout Maryland. The questions cover both federal regulations and Maryland-specific rules to ensure you have the knowledge needed to operate commercial vehicles safely in Maryland and across state lines if applicable.

You need to take the test if you're:

• Getting your first CLP
• Adding a new endorsement
• Upgrading your CDL class (from Class B to Class A for example)
• Reinstating an expired CDL (over one year)
• Transferring a CDL from another state with new endorsements

All applicants must take the general knowledge test plus additional tests for specific endorsements like Passenger (P), School Bus (S), Tank Vehicles (N), Hazmat (H), or Doubles/Triples (T). Each endorsement has its own test focused on that specific vehicle or cargo type.

The test ensures commercial drivers have the knowledge to operate commercial motor vehicles safely. It verifies understanding of regulations, safety practices, technical knowledge, and emergency procedures. This helps maintain safety standards and reduces accident risks on public roads.

Commercial vehicles can cause significant damage in accidents due to their size and weight, so proper knowledge and training are essential before operating these vehicles. The knowledge test is the first step in ensuring you're prepared for the responsibility of commercial driving.

The test follows Federal Motor Carrier Safety Administration standards while incorporating Maryland-specific regulations. This ensures national consistency in commercial driver qualifications while addressing state-specific requirements.

Topics covered include general operating skills, air brake operations, combination vehicles, and specific endorsements. Your Maryland CDL will be recognized throughout the United States, allowing you to operate commercial motor vehicles across state lines (as long as you meet age and other qualifications for interstate commerce).

• General Knowledge: 50 questions
• Air Brakes: 25 questions
• Combination Vehicles: 20 questions
• Passenger Endorsement: 20 questions
• School Bus Endorsement: 20 questions
• Hazmat Endorsement: 30 questions
• Tank Vehicles Endorsement: 20 questions
• Doubles/Triples Endorsement: 20 questions

The questions are multiple choice with 4 possible answers for each question. The tests are designed to thoroughly evaluate your knowledge of safety procedures, regulations, and technical understanding of commercial motor vehicles.

Sample question: In a hydraulic brake system, what does a soft, spongy brake pedal usually indicate?

• Worn brake linings
• Air in the hydraulic lines
• Weak return springs
• Frozen wheel cylinders

Answer: B. Air in the hydraulic lines

You must answer 80% of questions correctly on each test:

• General Knowledge: 40/50
• Air Brakes: 20/25
• Combination Vehicles: 16/20
• Passenger Endorsement: 16/20
• School Bus Endorsement: 16/20
• Hazmat Endorsement: 24/30
• Tank Vehicles Endorsement: 16/20
• Doubles/Triples Endorsement: 16/20

Each test is scored separately, and you must pass each one individually. If you fail one test but pass others, you'll only need to retest the failed test.

The test is only available in English. Federal regulations require commercial drivers to read and speak English sufficiently to understand traffic signs, communicate with officials, complete records, and understand shipping documents. This ensures all commercial drivers can safely navigate roadways, communicate with law enforcement and emergency services, and properly handle documentation. There are no exceptions to this language requirement for CDL testing in Maryland.

No. You cannot use notes, electronic devices, reference materials, or calculators during the test. Testing areas are monitored, and using prohibited materials will result in test failure. All personal items must be stored in a designated area during testing. This includes:

• Cell phones and electronic devices
• Notes or cheat sheets
• Commercial Driver License manuals
• Reference materials of any kind
• Calculators (unless specifically authorized for certain questions)

Using prohibited materials during testing could result in immediate disqualification and may affect your ability to test again in the future.

There is no time limit, but most applicants complete the general knowledge test in 60-90 minutes. Most endorsement tests take 30-45 minutes each. Plan accordingly if taking multiple tests in one visit. The MVA provides sufficient time to complete the tests without rushing. If you have documented learning disabilities or other special needs, accommodations may be available with proper documentation.

• General Knowledge (required for all CDLs)
• Air Brakes (for vehicles with air brakes)
• Combination Vehicles (for Class A licenses)
• Passenger (P) Endorsement (for buses)
• School Bus (S) Endorsement
• Doubles/Triples (T) Endorsement
• Tank Vehicle (N) Endorsement
• Hazmat (H) Endorsement

Each test covers specific knowledge for that class of vehicle or type of operation. You only need to take the tests relevant to the type of commercial driving you plan to do.

Sample question: What is "weight transfer" in a tanker vehicle?

• The process of shifting cargo between tanks
• The movement of liquid within a partially filled tank during acceleration or braking
• Moving weight from one axle to another
• The method of balancing load weights during unloading

Answer: B. The movement of liquid within a partially filled tank during acceleration or braking

General Knowledge: Vehicle inspection procedures, basic control, shifting gears, space management, night driving, adverse weather conditions, emergency procedures, cargo handling, accident procedures, fires, fatigue awareness, and basic hazardous materials regulations.

Air Brakes: System components and function, dual air brake systems, inspecting air brakes, proper use in various conditions, emergency stops, brake system failures, and brake lag/fade.

Combination Vehicles: Coupling and uncoupling procedures, inspection points, handling characteristics, rollover prevention, jackknife avoidance, turning techniques, and backing procedures for combination vehicles.

Passenger (P): Passenger loading and unloading procedures, proper use of emergency exits, passenger communication, accessibility requirements, dealing with disruptive passengers, and railroad crossing requirements for passenger vehicles.

School Bus (S): Student loading and unloading procedures, emergency evacuation protocols, operating around schools, railroad crossing procedures, student management, danger zones around the bus, and special equipment.

Doubles/Triples (T): Coupling and uncoupling multiple trailers, handling characteristics during various maneuvers, inspection procedures, identifying and correcting handling problems, and operating in adverse conditions.

Tank Vehicle (N): Liquid surge and weight distribution effects on handling, baffled versus non-baffled tanks, loading/unloading procedures, and special braking for partially full tanks.

Hazmat (H): Classification and identification of hazardous materials, proper documentation, loading/unloading procedures, driving rules, emergency response procedures, and security awareness.

• Study all relevant sections of the Maryland CDL Manual for your license class and endorsements
• Take our practice tests to assess your knowledge
• Create a study schedule over several weeks rather than cramming
• Make flashcards for difficult concepts and technical terms
• Focus extra time on challenging topics (air brakes, hazmat)
• Review the pre-trip inspection procedures thoroughly
• Pay attention to Maryland-specific regulations and requirements
• Study vehicle systems and components until you understand how they function
• Familiarize yourself with all required documentation and procedures

The key to success is consistent study over time rather than last-minute cramming. Many applicants underestimate the technical knowledge required, especially for specialized endorsements.

Yes! Our free practice tests are available online from various sources, including the Maryland MVA website. Practice tests will help you:

• Identify knowledge gaps in your understanding
• Build confidence through repeated practice
• Simulate the actual test environment and format
• Track your progress as you improve
• Understand explanations for both correct and incorrect answers
• Get familiar with the types of questions asked on the actual test

Practice tests cover all CDL test categories and are updated regularly to reflect current testing standards. Using practice tests has been shown to increase first-attempt pass rates.

• Start studying at least 2-3 weeks before your test date
• Understand concepts rather than simply memorizing answers
• Take practice tests to identify and focus on weak areas
• Get enough rest the night before your test
• Eat a good meal before testing to maintain concentration
• Read questions completely before selecting answers
• Look for keywords like "always," "never," or "except" that can change a question's meaning
• Choose safety-oriented answers when unsure
• Review all answers before submitting if the testing system allows
• Stay calm and focused throughout the test

Sample question: When driving in fog, you should:

• Use high beam headlights for better visibility
• Increase your speed to get through the fog faster
• Use your low beam headlights and slow down
• Turn off all lights to avoid glare

Answer: C. Use your low beam headlights and slow down

Practice tests cover the same topics and format as the actual test, though specific questions differ. The questions are designed to reflect the style, difficulty level, and content of the actual Maryland CDL knowledge test. Practice tests help you become familiar with:

• Question formats and wording styles
• Content coverage and depth
• Time management during testing
• Critical thinking skills needed for test success

Focus on understanding concepts rather than memorizing specific answers, as the actual test draws from a large question bank and each test is unique.

At designated Maryland MVA offices that offer commercial licensing services. Not all MVA offices provide CDL testing, so check the MVA website or call ahead to confirm. Testing locations have special equipment and trained staff for CDL testing. Major testing locations are in Glen Burnie, Bel Air, Frederick, Salisbury, Waldorf, and other cities throughout Maryland.

Yes, appointments are required. Schedule through:

• MVA website
• Call 1-800-950-1MVA (1682)

Some locations may have limited walk-in availability for CDL knowledge tests, but appointments are highly recommended to ensure you test at your preferred time and location.

No. All CDL knowledge tests must be taken in person at authorized MVA offices to ensure security, identity verification, and test integrity. This is a federal requirement that applies to all states, not just Maryland. In-person testing prevents cheating and ensures the person receiving the CDL is the one who demonstrated the knowledge.

Required documents:

• Maryland driver's license
• Social Security card/number
• Proof of citizenship/legal residency (birth certificate, passport, permanent resident card, etc.)
• Proof of Maryland residency (two documents showing your Maryland address)
• Current DOT Medical Certificate (Form MCSA-5876)
• Completed CDL application
• Payment for applicable fees (cash, check, or credit card)
• For Hazardous Materials: Additional identification documents for security threat assessment

Other:

• Reading glasses if needed
• Appointment confirmation
• Knowledge of your medical history for medical certification

All documents must be original or certified copies. Photocopies are not accepted. If you're unsure about document requirements, contact the MVA before your appointment or visit the Maryland MVA CDL Requirements page.

Arrive 15-20 minutes early to allow time for:

• Document verification
• Application processing
• Fee payment
• Getting settled before the test begins

If you arrive late, you may have to reschedule. First-time applicants should arrive 30 minutes early to allow time for paperwork processing. Traffic and parking at MVA offices can be unpredictable, so plan accordingly.

You'll receive a Commercial Learner's Permit (CLP) valid for 12 months with these conditions:

• Must wait at least 14 days before taking the skills test
• Can only drive with a qualified CDL holder in the passenger seat
• No passengers except supervisors, trainees, or examiners
• No hazardous materials transport
• Other restrictions based on vehicle type/endorsements
• Specific endorsements you passed tests for will be included on your CLP

Practice driving commercial vehicles while supervised before taking your skills test. This practice time is crucial to develop the skills needed to pass the behind-the-wheel test.

Scores are valid for 12 months, the same as your CLP. If your CLP expires before you complete the skills test, you'll need to retake all knowledge tests. There are no extensions on score validity, so plan to complete your skills test within the 12-month window to avoid having to retest. This ensures your knowledge is current when you get your full CDL.

If you fail:

• Wait until the next business day to retest
• Only retest the sections you failed
• Use our practice tests to focus on weak areas
• Review incorrect answers to understand why they were wrong
• Consider studying with different methods if you're struggling with particular topics

After failing a knowledge test for the second time, you must wait a minimum of seven days before retesting that specific test again. There's no limit to how many times you can retest, but repeated failures may indicate you need more preparation.

Sample question: If you must back up at a student drop-off point when driving a school bus, you should:

• Back up before students exit the bus
• Ask another adult to guide you
• Wait until students are back on the bus
• Have students watch from a safe distance

Answer: B. Ask another adult to guide you

After holding your CLP for at least 14 days:

• Go to the MVA website or call 1-800-950-1MVA (1682)
• Make sure your CLP is valid and medical certificate is current
• Arrange for a test vehicle that matches your CDL class
• Pay the skills test fee ($25 for Class A/B, $12.50 for Class C)
• Choose a date and time from available slots

Skills tests are conducted at select MVA locations. The skills test consists of a pre-trip inspection, basic vehicle control, and on-road driving demonstration. Make sure you're prepared for all three parts before scheduling your test.