Air Brakes #1
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.
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19 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.
A one-way check valve is required to be between an air compressor and the first main reservoir. This valve prevents air from escaping the system if the air compressor develops a leak.
20 . In an empty combination vehicle, the stiff suspension springs and strong brakes will have:
An empty combination vehicle will come to a complete stop more slowly than a fully-loaded vehicle. With less weight in a trailer, the stiff suspension springs and strong brakes will have lower traction than they would if the vehicle carried more weight.
21 . Service brakes should:
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.
22 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Keep the control at the halfway mark.
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.
23 . ABS usually shortens a vehicle's stopping distance.
While an Anti-Lock Braking System (ABS) helps give a driver more control while braking, it does not necessarily shorten the vehicle's stopping distance.
24 . Operating combination vehicles usually requires ____ operating single vehicles.
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.
25 . A driver can rely on front wheel braking to work:
Front wheel braking is effective under all road conditions. It is unlikely that you will experience a front wheel skid, even on ice.
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2025 Minnesota | Frequently Asked Questions
A CDL Class B license in Minnesota allows the holder to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or a vehicle towing another not exceeding 10,000 pounds. This includes buses, farm labor vehicles, and any vehicle designed to transport 24 passengers or more, including the driver.
A Class B CDL (Commercial Driver's License) in Minnesota allows the holder to operate single vehicles with a GVWR (Gross Vehicle Weight Rating) of 26,001 or more pounds, or any such vehicle towing another not in excess of 10,000 pounds. This includes straight trucks, large buses, segmented buses, and dump trucks with small trailers.
To acquire a Class B CDL license in Minnesota, you must be at least 18 years old (21 for interstate driving), have a valid Minnesota driver's license, pass a vision test, and successfully complete a knowledge test for the type of vehicle you plan to drive. Additionally, you must pass a skills test, which includes a pre-trip vehicle inspection, basic controls test, and on-road driving examination.
In Minnesota, you must be at least 18 years old to qualify for a Class B CDL license. However, it's important to note that while this age allows you to operate commercial vehicles within the state (intrastate), you must be at least 21 years old to drive commercial vehicles across state lines (interstate).
While not always necessary, specific endorsements may be required for a Class B CDL license in Minnesota depending on the type of vehicle you plan to drive or the cargo you intend to carry. These endorsements could include passenger, school bus, tanker, hazardous materials (HazMat), or combination vehicle endorsements. Each endorsement requires passing additional knowledge and skills tests.
The Class B CDL skills assessment in Minnesota encompasses three areas: pre-trip vehicle inspection, basic vehicle control, and on-road driving. The pre-trip inspection tests your ability to assess the safety of your vehicle. Basic control tests your ability to maneuver and control the vehicle. On-road driving tests your ability to safely operate the vehicle in various traffic situations.
Class B CDL license holders in Minnesota are restricted to operating vehicles under 26,001 lbs. They can't operate Class A vehicles unless they have the appropriate endorsements. Additionally, they may be limited by any restrictions noted on their license, such as "no air brake equipped vehicles", "automatic transmission only", or "no passengers" in commercial buses or vans.
Yes, in Minnesota, the written Class B CDL test is available in several languages other than English. However, federal regulations require that all CDL holders must be able to read and speak English sufficiently to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, you can request accommodations for the Class B CDL written exam if you have a disability. The Minnesota Department of Public Safety is committed to providing equal access to its services. Contact them directly or visit their website for information on how to request accommodations. It's advisable to make your request well in advance of your scheduled test date.
Yes, if you don't pass the Class B CDL written test in Minnesota, you can retake it. However, you must wait until the next day to retake the test. There is no limit to the number of times you can retake the test, but a retesting fee will be charged each time after the first two attempts.
