Air Brakes #2
Air Brakes Endorsement Test | Michigan 2025 #2 Page 4 of 4
Train for FREE online with our Michigan 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 MI 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 . What do air brakes use to make the brakes work?
Many large CMVs are equipped with air brakes. An air braking system uses compressed air to operate.
20 . The air storage tanks:
The air storage tanks in an air brake system store compressed air to be used for braking. They hold enough air for the brakes to still be used several times if the compressor stops working.
21 . When leaving a vehicle unattended, a driver should:
Always apply the parking brake when leaving your vehicle unattended.
22 . Air pressure should build up in a single air system within:
In single air systems, air pressure should build from approximately 50 to 90 psi within three minutes.
23 . If air pressure drops to a level between ____, a visual low pressure warning signal should have already activated.
A visual low pressure warning signal should activate before air pressure drops to a level between 55 and 75 psi. This signal could be a light, a buzzer, or a wig wag.
24 . ____ make up the emergency brake system.
In an air brake system, there are three different braking systems: a service brake system, a parking brake system, and an emergency brake system. The emergency brake system uses parts of both the parking and service brake systems.
25 . 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.
See the exact questions that will be on the 2025 Michigan DMV exam.
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2025 Michigan | Frequently Asked Questions
A CDL Class B license in Michigan allows drivers to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or a towed vehicle not exceeding 10,000 pounds. This typically includes buses, dump trucks, tow trucks, delivery trucks, and garbage trucks. It also permits the transportation of 16 or more passengers including the driver.
A Class B CDL license in Michigan allows the operation of single vehicles with a gross vehicle weight rating of 26,001 pounds or more, or a towed vehicle not exceeding 10,000 pounds. This typically includes large passenger buses, segmented buses, dump trucks, delivery trucks, garbage trucks, and straight trucks.
To acquire a Class B CDL license in Michigan, you must be at least 18 years old (21 for interstate driving), possess a valid Michigan driver's license, pass a vision test, and successfully complete a knowledge test. You must also pass a skills test, which includes a pre-trip vehicle inspection, basic controls test, and on-road driving examination.
In Michigan, you must be at least 18 years old to qualify for a Class B CDL license for intrastate driving (within Michigan only). However, if you intend to drive interstate (across state lines) or haul hazardous materials, you must be at least 21 years old.
Specific endorsements for a Class B CDL license in Michigan are not necessary, but they can expand the types of vehicles you are allowed to drive. For example, obtaining a Passenger or School Bus endorsement allows you to drive vehicles designed to carry 16 or more passengers, including the driver. Each endorsement requires passing additional tests.
The Class B CDL skills assessment in Michigan includes three components: a pre-trip vehicle inspection to ensure the vehicle is safe to drive, a basic controls test to verify your ability to control the vehicle, and an on-road driving test to evaluate your practical driving skills in various traffic situations and maneuvers.
Class B CDL license holders in Michigan are limited to operating single vehicles with a GVWR of 26,001 or more pounds, or any such vehicle towing a vehicle not in excess of 10,000 pounds GVWR. They can't operate Class A vehicles unless they get a Class A endorsement. Also, to transport passengers or hazardous materials, specific endorsements are required.
In Michigan, the written Class B CDL test is typically administered in English. However, for those who are not fluent in English, the state offers the test with audio assistance. It's crucial to contact your local Michigan Secretary of State office to inquire about available language accommodations for the written test.
Yes, Michigan provides reasonable test accommodations for individuals with disabilities taking the Class B CDL written exam. The accommodations can include extra time, breaks, or audio assistance. You need to request these accommodations in advance by contacting your local Michigan Secretary of State office and providing appropriate documentation of the disability.
If you don't pass the Class B CDL written test in Michigan, you can retake it. However, you must wait at least one day before attempting the test again. Keep in mind, if you fail the test three times, you'll have to start the application process over, including paying all applicable fees.
