What's on the Michigan CDL Permit Test? Question Count & Topics (2026)
Michigan CDL permit test rules follow the federal CDL standard. The general knowledge test is 50 multiple-choice questions and you need 40 correct (80%) to get your CLP. That is the core number everyone asks about first. The CDL permit test Michigan is run through the Michigan Secretary of State (SOS). It sticks to the federal model for the general knowledge exam. Endorsement tests add more questions depending on what you plan to drive. The Michigan CDL manual is your source of truth for exact counts. The 50-question general knowledge test is the baseline. Drivio has free Michigan CDL practice tests at /cdl/michigan if you want to check yourself before you book.
How Many Questions Are on the Michigan CDL General Knowledge Test?
Michigan uses the federal standard. On the Michigan CDL general knowledge test you'll answer 50 questions and need 40 right, and every CLP applicant in the state takes it no matter what class they're going for. Locations include Detroit, Grand Rapids, Warren, and other Michigan branches. The SOS runs the test at branch offices. You schedule through their system. The test covers safe operation basics. It is not specific to one class. My Class A students from Sterling Heights take the same core test as the Class B folks from Ann Arbor.
| Test | Number of questions | Correct answers to pass |
|---|---|---|
| General Knowledge | 50 | 40 (80%) |
| Air Brakes | 25 | 20 (80%) |
| Combination Vehicles | 20 | 16 (80%) |
The endorsement tests are smaller than the 50-question general test. Many are shorter.
Endorsement and Air-Brake Knowledge Tests
On top of general knowledge, every endorsement comes with a knowledge test of its own. The main tests are:
- Combination vehicles
- Air brakes
- Passenger
- School bus
- Tanker
- Hazmat
- Doubles/triples
Question counts vary by endorsement and are smaller than the general knowledge test. For example, the air brakes test in Michigan typically has 25 questions, while combination vehicles often has 20. The passenger and school bus tests are usually somewhere around there too, but check the manual for the exact number.
Which ones you take comes down to the class you want and the work you'll be doing. If you want a Class A, use a michigan cdl class a practice test. A Class A driver hauling freight on I-75 through Detroit will need combination vehicles and probably air brakes. A Class B school bus driver in Lansing needs passenger and school bus endorsements. If you're hauling liquid in a tanker out of Grand Rapids, add the tanker test. Look up the exact count for each endorsement in the Michigan CDL manual, and ask the SOS which tests your job needs before you book.
What Topics Are on the Michigan CDL Knowledge Test?
All the general knowledge questions come out of the Michigan CDL manual. Key topics include:
- Vehicle inspection
- Basic control
- Shifting
- Seeing and communicating
Space and speed management show up a lot, especially around following distance and stopping distance. Hazard awareness, emergencies, and skid control are also tested. Cargo safety is in there too, covering weight distribution and securement.
Hazmat and passenger content are tested separately, not on the general knowledge exam. So if you are not pursuing those endorsements, you do not need to study those chapters for the core test. But air brakes and combination vehicles are separate too. The general test sticks to the basics of running a big truck safely. Read the general knowledge chapters of the manual first, then take a MI CDL practice test and see which chapters you keep missing.
How the Knowledge Tests Lead to Your CLP
Passing the general knowledge test, plus any required endorsement tests and a vision screening, earns you a Commercial Learner's Permit. The CLP is not a full CDL. It lets you practice with a qualified CDL holder in the passenger seat. If you plan on Class B, use a michigan cdl b practice test. Federal rules require a CLP for at least 14 days before the skills test. That waiting period applies in Michigan too.
You also need ELDT theory training before certain tests. Entry-Level Driver Training is a federal requirement. It applies to first-time Class A and Class B applicants. It also covers school bus, passenger, and hazmat endorsements. The training provider must be registered with FMCSA. Once ELDT is done and you've had the CLP for 14 days, you can book the Michigan skills test. Most people get hung up on the knowledge tests, not the paperwork, so that's where I'd put your time first.
How to Pass the Michigan CDL Permit Test
The study plan is simple but it works. Start with the Michigan CDL manual. Read the whole general knowledge part before you touch a practice test. Then take repeated Michigan CDL practice tests covering general knowledge and any endorsements you need. Drivio's free Michigan CDL practice tests at /cdl/michigan are built for this. When you miss a question, look the answer up in the manual and figure out why yours was wrong, because the SOS might word the same question differently. The real test often has close answer choices. For air brakes, run a michigan cdl air brake practice test until the cut-in and cut-out pressures stick.
Air brakes and vehicle inspection deserve most of your extra study time. Many first-time test takers miss points there. This is true in Detroit and Grand Rapids. I'd want you over 80% on practice tests every time before you book the SOS visit. Thirty minutes a day for two weeks beats four hours the night before, and it's easier to fit around a work shift.
Michigan CDL Permit Test FAQ
How many questions are on the Michigan CDL permit test? General knowledge has 50 questions. Air brakes usually has 25 and combination vehicles about 20, and the other endorsement tests are around that size.
What score do I need to pass? On the general knowledge test you need 80%. That is 40 correct answers out of 50. Endorsement tests also require 80%.
How many endorsement tests are there? There are seven main endorsement tests:
- Combination vehicles
- Air brakes
- Passenger
- School bus
- Tanker
- Hazmat
- Doubles/triples You only take the ones your job requires.
Do I need to pass air brakes? Only if the vehicle you plan to drive has air brakes. Most Class A vehicles do, so most Class A applicants take it. Class B varies.
Can I take them the same day? Yes. You can take the general knowledge test and endorsement tests in one SOS visit. You'll need enough time. Each test is graded on its own, so passing general knowledge doesn't cover a failed tanker test.
Common Questions About the Michigan CDL Written Test
How hard is the general knowledge test? It's not a trick test. If you've actually read the manual, most questions are pretty direct. Some questions include very similar choices. Read carefully.
How long does it take? For most people, general knowledge alone takes less than an hour. Endorsement tests add time. General knowledge, air brakes and combination in one trip can take 90 minutes to two hours at the SOS, so don't try it on a lunch break.
What if I fail, and how soon can I retake it? Michigan allows retakes. There is a waiting period and a fee. The SOS clerk can tell you how long the wait is, and I'd use it to go back over the chapters you missed.
How many practice tests should I take? Keep taking them until you're at 85% or better every time. For most people, that means five to ten full practice tests. Drivio's Michigan CDL practice tests at /cdl/michigan make this easy.
Are endorsement tests separate visits? No. You can do all of them on the same visit as long as you book enough time for it. Fail one endorsement and you'd normally only come back for that one.
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