MS CDL Practice Tests

• Test Format: Computer-based testing at Mississippi DPS offices
• General Knowledge Test: 50 questions, 80% passing score required
• CLP Validity: Valid for 12 months
• Waiting Period: Must hold CLP for 14 days before skills test
• Languages: English only
• Testing Fees: $25 for Class A/B skills tests
• Endorsement Fees: Vary by endorsement type
• Retesting: Available with applicable fees

The Mississippi CDL knowledge test is a test of your knowledge of commercial driving regulations and safety practices. This computer-based test is required to get your Commercial Learner's Permit (CLP) which you must have before you can take the skills test for a full CDL. The test covers vehicle operations, safety protocols, traffic regulations and proper operating procedures for commercial vehicles. Mississippi's test includes federal requirements and state specific regulations so you'll have the knowledge to operate commercial vehicles in Mississippi and across state lines if applicable.

You must take the CDL knowledge test if you:

• Are applying for your first Commercial Learner's Permit
• Are adding new endorsements to your existing CDL
• Are upgrading your CDL class (such as from Class B to Class A)
• Are reinstating a CDL that has been expired for more than one year
• Are transferring a CDL from another state and adding new endorsements

All applicants must take the general knowledge test. Depending on the type of commercial driving you will be doing, you will also need to take additional tests for specific endorsements such as Passenger (P), School Bus (S), Tank Vehicles (N), Hazardous Materials (H), or Doubles/Triples (T).

The CDL knowledge test is a critical safeguard to make sure commercial drivers have the knowledge to safely operate large commercial vehicles. This test verifies your knowledge of safety protocols, regulatory requirements, vehicle systems and emergency procedures. This comprehensive test helps keep public roadways safe and reduces accidents. Commercial vehicles are hazardous due to their size and weight, so proper knowledge and preparation is essential before operation. The knowledge test is the first step in verifying your readiness for commercial driving responsibilities.

Mississippi's CDL knowledge test meets Federal Motor Carrier Safety Administration standards and includes state-specific regulations. This dual approach ensures national consistency in commercial driver qualifications and addresses Mississippi's requirements. Test topics include general driving skills, air brake operations, combination vehicles and various endorsements. This means your Mississippi CDL will be recognized nationwide and you can operate commercial vehicles across state lines (as long as you meet age and other requirements for interstate commerce).

Mississippi's CDL knowledge tests include:

• 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 four possible answers. These tests thoroughly test your knowledge of safety procedures, regulations and technical knowledge of commercial vehicles.

Sample question: When checking your trailer connection you should make sure that:

• The fifth wheel is tilted upward
• There is no space between the upper and lower fifth wheel
• The kingpin is bent
• The apron is sitting on top of the fifth wheel

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

In Mississippi you must score 80% on each test:

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

Each test is scored separately. If you pass some tests but fail others, you will only need to retake the tests you failed.

In Mississippi, the CDL knowledge test is only in English. Federal regulations require commercial drivers to have sufficient English proficiency to read traffic signs, communicate with officials, complete required records and understand shipping documentation. This English proficiency requirement ensures all commercial drivers can safely operate on the roadways, communicate with law enforcement and emergency services, and properly handle required documentation. No exceptions are made to this language requirement for CDL testing in Mississippi.

No study aids are allowed during Mississippi CDL knowledge tests. Prohibited items include:

• Cell phones and electronic devices
• Notes or reference materials
• Commercial Driver License manuals
• Calculators (unless specifically allowed for certain questions)
• Any other reference materials

Testing areas are monitored and using prohibited materials will result in immediate test failure. All personal items must be stored in designated areas during testing. Using unauthorized materials during testing may result in disqualification and could affect your eligibility for future testing.

Mississippi doesn't have a time limit for CDL knowledge tests, but most applicants complete the general knowledge test in 60-90 minutes and endorsement tests in 30-45 minutes. The Mississippi DPS gives you enough time to complete the tests without rushing. Plan accordingly if you're taking multiple tests in one visit. If you have documented learning disabilities or other special needs, accommodations may be available with proper documentation.

Mississippi offers several CDL knowledge tests based on the type of commercial driving you will be doing:

• General Knowledge – Standard exam for any CDL license.
• Air Brakes – For any commercial vehicle with air brakes.
• Combination Vehicles – Required for operating vehicles with trailers.
• Passenger (P) – Endorsement for transporting passengers.
• School Bus (S) – Endorsement for certified school bus use.
• Doubles/Triples (T) – Endorsement to pull multiple trailers.
• Tank Vehicles (N) – Endorsement for tank hauling.
• Hazardous Materials (H) – Endorsement for dangerous goods.

You only need to take the tests for the endorsements you plan to use.

Sample question: When driving with air brakes, what is brake lag?

• Time for brakes to wear out
• Time for air to flow through lines when brake pedal is pressed
• Time to move foot from accelerator to brake
• Time to pull parking brake

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

Air Brakes: System components and function, dual air brake systems, inspection procedures, proper operation in various conditions, emergency stops, 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, emergency exit operations, passenger communication, accessibility requirements, managing disruptive passengers, and railroad crossing procedures for passenger vehicles.

School Bus (S): Student loading and unloading procedures, emergency evacuation protocols, operating near schools, railroad crossing procedures, student management, danger zones around the bus, and specialized 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 specialized braking techniques for partially full tanks.

Hazardous Materials (H): Classification and identification of hazardous materials, documentation requirements, loading/unloading procedures, driving regulations, emergency response procedures, and security awareness.

Study for the Mississippi CDL knowledge test by:

• Thoroughly reading the Mississippi CDL Manual sections relevant to your license class and endorsements
• Taking our free practice tests
• Creating a multi-week study schedule rather than cramming
• Making flashcards for complex concepts and technical terminology
• Mastering challenging topics like Pre-Trip Inspection, Mississippi-specific regulations, vehicle systems, and required documentation

Don't underestimate the technical depth required, especially for endorsements. Consistent study over time is more effective than last-minute cramming.

Yes! Our free Mississippi practice tests will help you:

• Identify knowledge gaps
• Build confidence
• Simulate the test environment
• Track progress
• Get explanations for correct/incorrect answers
• Familiarize yourself with question types on the actual test

Practice tests cover all CDL test categories and are updated regularly. Many applicants pass on their first attempt using practice tests.

To pass the Mississippi CDL knowledge test:

• Start studying 2-3 weeks before your test
• Focus on understanding, not memorization
• Use practice tests to fill knowledge gaps
• Get rest before the test
• Eat well before the test
• Read each question thoroughly
• Pay attention to qualifier words (always, never, except)
• When unsure, choose the safety-oriented answer
• Review all answers if possible
• Stay calm and focused

Sample question: When should you use turn signals?

• Only when other vehicles are present
• At least 100 feet before turning
• Just as you begin to turn
• Only when changing lanes

Answer: B. At least 100 feet before turning

Practice tests are similar to the actual Mississippi CDL knowledge test in format and content areas, but questions will be different. They reflect the style, difficulty and content of the real exam. Practice tests help you understand:

• Question formats and wording
• Content scope and depth
• Time management
• Critical thinking skills needed for success

Focus on understanding fundamental concepts, not specific answers, as the actual test draws from a large question bank and each test has unique questions.

Take the Mississippi CDL knowledge test at designated DPS offices that offer commercial licensing services. Not all DPS offices offer CDL testing, so check the Mississippi DPS website or call before visiting. These locations have the necessary equipment and staff for CDL testing. Major testing sites include Jackson, Gulfport, Hattiesburg, Tupelo and other cities in Mississippi.

Yes, appointments are highly recommended for Mississippi CDL knowledge tests. Schedule through:

• Mississippi DPS Online Services
• Your local DPS office by phone at 601-987-1212

Some locations may accept walk-ins for CDL testing, but wait times can be long and you may be turned away if daily capacity is reached. Scheduling an appointment ensures testing at your preferred time and location.

No, Mississippi CDL knowledge tests must be taken in person at authorized DPS offices. This is to ensure security, identity verification and test integrity. In-person testing is federally required across all states, not just Mississippi. This prevents cheating and confirms the person receiving the CDL is the same person who demonstrated the required knowledge.

Bring these required documents to your Mississippi CDL knowledge test:

• Valid Mississippi driver's license
• Social Security card
• Proof of citizenship or legal residency (birth certificate, passport, permanent resident card, etc.)
• Two documents proving Mississippi residency
• Current DOT Medical Certificate (Form MCSA-5876)
• Completed CDL application
• Payment for applicable fees

For Hazmat: Additional identification for security screening

Also bring:

• Reading glasses if needed
• Appointment confirmation
• Information about your medical history for certification

All documents must be original or certified copies—photocopies are not accepted. Contact the Mississippi DPS if you have questions about document requirements before your appointment.

Arrive 15-20 minutes before your scheduled Mississippi CDL knowledge test to allow time for:

• Document verification
• Application processing
• Fee payment
• Getting settled before testing begins

Late arrivals may need to reschedule. First-time applicants should arrive 30 minutes early to allow for additional paperwork processing. Traffic and parking at DPS facilities can be unpredictable, so plan accordingly.

After passing the Mississippi CDL knowledge test, you'll receive a Commercial Learner's Permit (CLP) valid for 12 months with these restrictions:

• You must wait at least 14 days before taking the skills test
• You can only drive with a qualified CDL holder in the passenger seat
• No passengers except for instructors, examiners or other trainees
• No hazmat transport
• Additional restrictions based on vehicle type and endorsements

Any endorsements you passed will be on your CLP.

Your Mississippi CLP allows you to practice driving commercial vehicles while supervised by a qualified CDL holder. This practice period is crucial for developing the skills needed to pass the behind-the-wheel skills test and become a safe commercial driver.

In Mississippi, CDL knowledge test scores are valid for 12 months, same as your CLP. If your CLP expires before you complete the skills test, you'll need to retest all knowledge tests. No extensions are given on score validity, so plan to complete your skills test within the 12-month window to avoid retesting. This timeframe ensures your knowledge is current when you get your full CDL.

If you fail any part of the Mississippi CDL knowledge test:

• You can retest after paying the applicable fees
• You only need to retest the sections you failed
• Use our practice tests to fill knowledge gaps
• Review incorrect answers to understand your mistakes
• Consider alternative study methods if struggling with specific topics

Mississippi doesn't limit how many times you can retest, but repeated failures indicate you need more preparation.

Sample question: What happens if you fail a section of the test?

• Wait 30 days before retesting
• Retest immediately at another location
• Retest after paying applicable fees
• Retest all sections, even those passed

Answer: C. Retest after paying applicable fees

After holding your Mississippi CLP for at least 14 days:

• Contact the Mississippi DPS to schedule your skills test
• Verify your CLP is valid and medical certificate is current
• Arrange for a test vehicle matching your CDL class
• Pay the skills test fee ($25 for Class A/B licenses)
• Choose a date and time

Testing is conducted at designated locations. The skills test includes pre-trip inspection, basic vehicle control and on-road driving. Be prepared for all three parts.