Michigan CDL General Knowledge Test: What to Expect

The Michigan CDL general knowledge test requires an 80% passing score, according to the Michigan Secretary of State. Michigan lists 50 questions for Group B and C tests and 70 questions plus a separate 20-question combination-vehicle test for Group A. Prepare for the tests attached to your intended vehicle and cargo, rather than assuming every CDL application uses the same exam.

Last verified: November 6, 2026

Which Michigan CDL tests belong on your study list?

The Michigan Secretary of State assigns CDL knowledge tests according to the commercial group, endorsements and braking equipment involved. Michigan’s official testing requirements distinguish the main group tests from combination vehicles, air brakes and endorsements. Make a written list of the required categories before choosing practice topics so a strong general score does not hide an untouched specialty subject.

Do not treat air brakes as a license class. Equipment knowledge and the test vehicle affect the restrictions on the credential. Likewise, a passenger endorsement is not replaced by passing a heavier vehicle’s group test. The licensing sequence in how to get a Michigan CDL helps connect the test list to the vehicle you intend to operate.

What should Michigan applicants learn from Driving Safely?

The Michigan Secretary of State’s CDL manual section on Driving Safely develops the core knowledge needed to inspect a commercial vehicle, manage space and respond to hazards. Michigan applicants should understand those decisions before moving to equipment-specific chapters. Knowing a component’s name is only useful if the driver also recognizes a dangerous condition and the appropriate response.

Start with a parked-vehicle walkthrough in your mind. Notice a leak, examine the tires, then enter the cab and watch the instruments. Next, imagine taking the vehicle into traffic: the study problem becomes seeing ahead, communicating intentions and leaving room to maneuver. Finally, picture a change in conditions such as reduced visibility or a blocked route. That sequence gives individual facts a practical setting.

Use the Michigan Commercial Driver License Manual’s chapter list to separate Driving Safely from Transporting Cargo Safely, Air Brakes and Combination Vehicles. Cargo questions require thinking about loading and securement; braking-system questions require understanding the equipment. A mixed practice round can reveal that you are comfortable with traffic decisions but still weak on the truck itself.

How does a Michigan app question connect to a real inspection?

Michigan CDL preparation should turn an instrument-panel question into a decision about whether the vehicle is ready to move. The Michigan manual’s in-cab inspection guidance describes checking gauges, warning indicators and controls after starting the engine. Read the following app question as an inspection problem, not a reason to ignore a warning that remains active.

To extend that question, ask what you would do if an ABS indicator stayed illuminated. Explain the meaning, then find the relevant manual guidance. A correct multiple-choice selection is a starting point; useful preparation also gives you the vocabulary to describe the defect and its effect without seeing the answer options.

How do Michigan retakes and training affect the exam plan?

Michigan requires a 1-day wait after an unsuccessful CDL knowledge test, according to the Secretary of State. Michigan also limits applicants to a test in each category per day. Leave time to review a failed subject instead of scheduling the rest of the licensing process on the assumption that every category will be passed immediately.

Training timing depends on the application. Under FMCSA’s Entry-Level Driver Training requirements, a first hazardous-material endorsement requires theory completion before its knowledge test. Covered initial Class A or B and passenger or school bus applications require their applicable training before skills testing. Your knowledge-test study plan should fit the training sequence, rather than substitute for it.

Keep endorsement preparation focused. A driver studying placarded loads can use the hazmat endorsement guide alongside the specific Michigan manual chapter. General vehicle-control questions will not cover every hazardous-material responsibility. Return to the Michigan CDL hub when you need the licensing steps as well as exam preparation.

Key takeaways

Michigan CDL testing preparation should match the selected group and all required specialty categories.

• Michigan requires at least 80% on each CDL knowledge test.
• Michigan lists 50 questions for each Group B or Group C test.
• Michigan lists 25 questions for the air-brakes test.

Frequently asked questions

Michigan CDL knowledge testing is an office transaction that precedes supervised permit driving and the applicable skills assessment.

Are Michigan CDL knowledge tests computer-based?

The Michigan Secretary of State administers written CDL knowledge tests at computer testing stations. Arrange the appropriate office visit for the application.

Does passing the knowledge tests allow solo commercial driving?

No. The Michigan CLP authorizes supervised practice with a driver holding the appropriate CDL. The remaining licensing requirements must be completed before independent operation.

Can the Michigan manual replace the skills inspection practice?

The Michigan CDL manual supports inspection preparation, but applicants must also learn to identify and explain items on the actual vehicle. Practice with the equipment used for training and testing.