Air Brakes #1
Air Brakes Endorsement Test | Minnesota 2025 #1
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.
25
20
20
1 . 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 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.
2 . What does the trailer air supply control look like?
It is a circular orange knob.
On newer vehicles, the trailer air supply control is an eight-sided red knob. It's used to control the tractor protection valve.
3 . Before driving a vehicle with air brakes, you should ensure that the ____ come on automatically when air pressure falls below 45 psi.
Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when air tank pressure falls to a level between 20 and 45 psi. You can do this by chocking the wheels and releasing air from the braking system by stepping on and off the brake pedal. Once the pressure levels drop to an unsafe level, the parking brake valve should pop out and spring brakes should come on.
4 . The service air line is often controlled by the foot brake and is attached to the ____ valves.
The service air line carries air and is controlled by either the foot brake or trailer hand brake. The service air line is attached to relay valves, which allow the trailer brakes to be applied quickly.
5 . A low air pressure warning signal:
A vehicle with air brakes must be equipped with a low air pressure warning signal. If the warning signal goes off while a vehicle is being driven, the driver should bring the vehicle to a complete stop and have the system repaired.
6 . Using the brakes creates heat. If too much heat is produced:
Brakes are designed to take a lot of heat, but drivers should not rely solely on the brakes to slow their vehicle. Brakes may fade and lose their ability to slow down the vehicle if they become too hot, so drivers should also rely on the engine braking effect.
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.