Air Brakes Endorsement Test | Minnesota 2025 #2

Train for FREE online with our Minnesota 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 MN Class A/Class B driver license in 2025, 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 . To help prevent rollovers, you should:

Accelerate quickly after stopping.

Drive slowly around turns.

Keep the load near the back of the trailer.

Keep the load on one side of the trailer.

To lower the risk of a rollover, load your cargo as closely to the ground as possible. To further reduce this risk, take curves and corners slowly.

2 . Operating a combination vehicle usually requires ____ operating a single vehicle.

Less skill than

About the same level of skill as

More skill than

Exactly the same level of skill as

Combination vehicles require more skill to drive than single vehicles. Combination vehicles are usually longer and heavier, and are more vulnerable to rollovers.

3 . To find out if a vehicle that was built before 1998 has an Anti-Lock Braking System (ABS), you can:

Pump the air brakes to activate the ABS.

Look into the back of the fifth wheel.

Check for wheel speed sensors coming from the back of the brakes.

If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can check under the trailer for wheel speed sensors coming from the back of the brakes.

4 . Where is the safety relief valve usually located?

Near the rear brake

Near the front brake

In an air tank

On the dashboard

An air brake system's safety relief valve is located in the tank that is first to receive air from the compressor.

5 . During a walk-around inspection, ensure there are no cracks on the brake drums that are more than ____ of the width of the friction area.

One half

One quarter

One third

One tenth

Before beginning a trip, it is important to check the brake drums during your walk-around inspection. It is unsafe to drive if any brake drum has a crack more than one half of the width of the friction area.

6 . Applying the brake pedal causes air pressure to activate an electric switch and:

Turn off the brake lights.

Turn on the low pressure warning light.

Turn on the brake lights.

Turn off the low pressure warning light.

In a vehicle with air brakes, the brake lights are activated when the brake pedal is pushed and air pressure moves an electric switch. With the application of air pressure, the switch will then turn on the brake lights.

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2025 Minnesota | Frequently Asked Questions

To secure a CDL Bus endorsement in Minnesota, you must first hold a valid CDL. Next, you need to pass the passenger endorsement written test. After passing the test, you'll have to complete a skills test in the type of vehicle you'll be driving. Lastly, you must pass a background check if transporting school-aged children.

To obtain a CDL Bus license in Minnesota, you must have a valid driver's license and pass the CDL general knowledge test. Then, complete a training course specific to bus driving. After this, pass the passenger endorsement written test and a skills test in the type of bus you'll be driving. A successful background check is also required.

Yes, specific training is necessary for a CDL Bus endorsement in Minnesota. You need to complete a bus-specific training course and pass the passenger endorsement written test. Also, you'll have to pass a skills test in the actual type of bus you will be driving. The state recommends having some practical driving experience as well.

CDL Bus licenses in Minnesota fall under three classes: Class A, B, and C. Class A is for vehicles with a combined weight over 26,001 pounds where the towed vehicle is over 10,000 pounds. Class B is for vehicles over 26,001 pounds or vehicles transporting over 16 passengers. Class C is for vehicles designed to carry 16 or more passengers or hazardous materials not covered by A or B.

No, you cannot use your personal vehicle for the CDL Bus driving test in Minnesota. The vehicle you use for the test must match the type and class of bus you plan to drive after receiving your CDL. This is to ensure you can operate that specific type of bus safely and efficiently.

During the CDL Bus driving test in Minnesota, several skills are evaluated. These include pre-trip vehicle inspection, basic vehicle control, and on-road driving. You may be asked to execute specific maneuvers like turning, merging, backing up, and parking. Also, you'll be evaluated on interacting with traffic, using signals, maintaining safe speeds, and more.

Yes, to obtain a CDL Bus endorsement in Minnesota, you must pass a Department of Transportation (DOT) physical examination. This exam ensures that you are medically qualified to safely operate a commercial vehicle. It evaluates aspects like vision, hearing, blood pressure, and checks for conditions that might impair your driving ability.

No, it is not permissible to transport passengers without a valid CDL Bus endorsement in Minnesota. Operating a commercial bus without the appropriate license and endorsement is illegal and can result in severe penalties, including fines and possible jail time. Always ensure your license is valid before driving a commercial bus.

Yes, the CDL Bus endorsement can be added to your existing Commercial Driver's License (CDL) in Minnesota. You don't need to apply for a new license. However, you are required to pass the Passenger Endorsement Knowledge Test and a skills test in a vehicle representative of the class of bus you wish to drive.

Yes, there are some restrictions for drivers with a CDL Bus endorsement in Minnesota. They must not have more than one license, the vehicle they drive must not be loaded beyond its designated capacity and they must comply with federal regulations regarding hours of service, including rest periods and maximum driving times.