Air Brakes Endorsement Test | Michigan 2026 #1

Train for FREE online with our Michigan CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a MI Class A/Class B driver license in 2026, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.

Number of Question 25

Passing Score 20

Number of Tests 20

1 . The air storage tanks:

Hold only enough air for one braking cycle.

Hold enough air for the brakes to be used several times if the compressor stops working.

Do not hold air unless there is an emergency.

The air storage tanks in an air brake system store compressed air to be used for braking. They hold enough air for the brakes to still be used several times if the compressor stops working.

2 . Friction in an S-cam brake is caused when the brake shoes and linings:

Press against the outside of the brake drum.

Press against the inside of the brake drum.

Push against each other.

Friction inside a brake drum is caused when the brake shoes and linings push against the inside of the drum. The friction in the drums will slow and stop the vehicle.

3 . What does an air compressor do in an air brake system?

It pumps air into the air storage tanks.

It fills the tires.

It moves air to the back of the truck.

In an air brake system, the air compressor pumps air into the air storage tanks. The air compressor is controlled by the air compressor governor.

4 . A slack adjuster should move no more than ____ from where it is attached to the push rod.

Two inches

Five inches

One inch

Before a trip, you should check each slack adjuster after parking, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure that they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.

5 . Air pressure should build up in a single air system within:

15 minutes.

12 minutes.

Three minutes.

In single air systems, air pressure should build from approximately 50 to 90 psi within three minutes.

6 . What do the two systems of a dual air brake system share?

Hoses

An air compressor

Air tanks

Both systems in a dual air brake systems share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.

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2026 Michigan | Frequently Asked Questions

In Michigan, to acquire a CDL Passenger endorsement, you must first have a Commercial Driver's License (CDL). Then, pass a written passenger endorsement test and a skills test in a passenger vehicle. The written test covers the information found in the Michigan CDL Manual's passenger transport section, and the skills test includes pre-trip inspection, basic controls, and on-road driving.

To obtain a CDL Passenger license in Michigan, you must be at least 18 years old for intrastate driving or 21 for interstate driving, have a valid Michigan driver's license, pass a Department of Transportation (DOT) physical examination, successfully complete a written general knowledge test and a passenger transport test, and demonstrate your skills through a three-part driving test.

While Michigan does not require specific training to secure a CDL Passenger endorsement, it's recommended to take a professional training course. Experience is not required, but you must pass a written passenger endorsement test and a skills test in a passenger vehicle. Studying the Michigan CDL Manual, particularly the passenger transport section, can help prepare for these tests.

Yes, to obtain a CDL Passenger endorsement in Michigan, you need to pass a written knowledge test specifically focused on passenger transport safety and operations. This is in addition to the general CDL written exam. The test covers topics like vehicle inspection, loading and trip start, on the road, after-trip vehicle inspection, prohibited practices, and use of brake-door interlocks.

During the CDL Passenger endorsement skills test, you'll need to demonstrate your ability to inspect your vehicle, check safety equipment, operate the vehicle in various traffic conditions, and perform maneuvers such as turning, backing up, and parking. You'll also need to showcase your knowledge on loading/unloading passengers, responding to emergencies, and handling special situations like railroad crossings.

No, you cannot legally transport passengers in Michigan without a valid CDL Passenger endorsement. This endorsement is required for drivers who wish to drive a vehicle designed to carry 16 or more passengers, including the driver. Driving without the necessary endorsements could result in heavy fines, license suspension, or even criminal charges.

Yes, you can add the CDL Passenger endorsement to your existing commercial driver's license. You don't need a new license, but you will have to pass the Passenger endorsement written test and, in some cases, a skills test. Check with the Michigan Secretary of State's office for specific requirements and procedures.

Yes, there are specific limitations for drivers with a CDL Passenger endorsement in Michigan. These include prohibitions on texting and using handheld mobile phones while driving. Also, drivers must ensure the safety of all passengers, and for school bus drivers, there are additional restrictions such as obeying school zone speed limits and requirements for picking up and dropping off students.

Yes, there are age-related prerequisites for acquiring the CDL Passenger endorsement in Michigan. You must be at least 21 years old to drive a commercial vehicle across state lines (interstate) or to carry hazardous materials. However, if you're only driving within Michigan (intrastate), you can get a CDL at age 18.

With a CDL Passenger endorsement, you will be eligible to drive vehicles such as buses, shuttles, and vans that are designed to carry 16 or more people including the driver. This endorsement is necessary for school bus drivers, city bus drivers, and anyone else who operates large passenger vehicles for commercial purposes in Michigan.