Before driving, you should always verify that your service brakes are in good working order. Testing the brakes before a trip allows you to locate any problems before you need to brake while on the road.

Only be tested by a trained mechanic.

Some pre-1975 vehicles have a front brake limiting valve, which has "normal" and "slippery" settings. The idea behind these valves was to limit the air pressure available to the front brakes when driving on slippery surfaces, and thereby reduce the danger of a front-wheel skid. Studies have found that this is not actually a concern, so if your vehicle has a front brake limiting valve, leave it in the "normal" position.

Set the control to the off position.

Keep the control at the halfway mark.

Combination vehicles are usually heavier and longer than single combination vehicles. Operating a combination vehicle requires a higher level of driving skill than operating a single commercial vehicle.

About the same level of skill as

Front wheel braking is effective under all road conditions. It is unlikely that you will experience a front wheel skid, even on ice.

Under all conditions, except for snow.

Air Brakes Endorsement Test | Minnesota 2025 #1 Page 4 of 4

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

Air Brakes Endorsement Test | Minnesota 2025 #1 Page 4 of 4

19 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.

20 . In an empty combination vehicle, the stiff suspension springs and strong brakes will have:

21 . Service brakes should:

22 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:

23 . ABS usually shortens a vehicle's stopping distance.

24 . Operating combination vehicles usually requires ____ operating single vehicles.

25 . A driver can rely on front wheel braking to work:

See the exact questions that will be on the 2025 DMV exam.

Wait, before you go

Air Brakes Endorsement Test | Minnesota 2025 #1 Page 4 of 4

19 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.

20 . In an empty combination vehicle, the stiff suspension springs and strong brakes will have:

21 . Service brakes should:

22 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:

23 . ABS usually shortens a vehicle's stopping distance.

24 . Operating combination vehicles usually requires ­­­­­____ operating single vehicles.

25 . A driver can rely on front wheel braking to work:

See the exact questions that will be on the 2025 DMV exam.

Wait, before you go

24 . Operating combination vehicles usually requires ____ operating single vehicles.