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 acquire a CDL Tank endorsement in Minnesota, you must first possess a valid Commercial Driver's License (CDL). Then, study the Minnesota CDL handbook's tank vehicle section. Afterward, schedule and pass a Tank Vehicle written test at your local Department of Motor Vehicles (DMV). Successful completion of the test will add the endorsement to your CDL.

Obtaining a CDL Tank license requires a valid Commercial Driver's License (CDL). You must study the tank vehicle section of the CDL handbook thoroughly. After understanding the material, schedule and pass a Tank Vehicle written test at your local DMV. Once you pass the test, the tank endorsement will be added to your CDL.

While specific training or experience isn't mandatory for a CDL Tank endorsement, it's highly beneficial. Understanding the material in the tank vehicle section of the CDL handbook is crucial. Passing the Tank Vehicle written test at your local DMV is required. Practical experience or training can help you better understand the rules and operations, increasing your chances of passing the test.

Yes, to obtain a CDL Tank endorsement in Minnesota, applicants must pass a specific written knowledge test. This test focuses on the safe transportation of liquid and gaseous materials. It's administered by the Minnesota Department of Public Safety and is in addition to the general CDL requirements.

The written test for a CDL Tank endorsement covers a variety of topics, including the inspection of tank vehicles, correct loading and unloading procedures, driving stability and handling, and the correct response to emergencies or hazardous conditions. It's key to study these areas thoroughly to pass the test and obtain your endorsement.

The CDL Tank endorsement assessment doesn't typically involve a skills or driving test. It focuses on the written exam which tests knowledge on specific topics like inspecting tank vehicles, understanding weight distribution, handling high center of gravity, and dealing with surge. However, general CDL testing will assess your ability to safely operate and maneuver the vehicle.

Yes, there are certain limitations for drivers with a CDL Tank endorsement. For example, they are only allowed to operate vehicles that carry liquid or gaseous materials in a tank or tanks having an individual rated capacity of more than 119 gallons and an aggregate rated capacity of 1,000 gallons or more. They must also adhere to strict safety and operational regulations.

No, liquid or gas materials cannot be transported without a valid CDL Tank endorsement. If a driver is caught transporting these materials without the proper endorsement, they could face serious penalties such as fines, suspension of their CDL, or even jail time. This endorsement is crucial for safety and regulatory compliance.

To add the CDL Tank endorsement to your current license in Minnesota, you will need to complete a fresh application. You must pass the written knowledge test specific to the Tank endorsement and provide the necessary documentation. Additionally, you may need to pass a skills test depending on the type of tank vehicle you will be operating.

Yes, handling hazardous materials with a CDL Tank endorsement requires additional training and certification, known as a Hazmat endorsement. This ensures drivers are knowledgeable about the risks and safety procedures associated with transporting hazardous materials. Additionally, a federal background check is required to obtain a Hazmat endorsement.