Air Brakes #1
Air Brakes Endorsement Test | Wisconsin 2025 #1 Page 3 of 4
Train for FREE online with our Wisconsin 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 WI 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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13 . Which of the following is not a part of an air brake system?
An axle brake system
Air brakes consists of three separate braking systems: the service brake system, the parking brake system, and the emergency brake system.
14 . A low air pressure warning signal should activate:
When tank pressure falls below 5 psi.
In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 60 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.
15 . Emergency brakes:
Are optional.
All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes. These brakes must be held by mechanical force.
16 . Brakes out of adjustment will:
Brakes out of adjustment will fade before those that are properly adjusted. Brake adjustment must be checked frequently to help prevent brake issues.
17 . If the safety relief valve in the air brake system releases air:
An air brake system has a safety relief valve, which releases air from the tanks if the pressure gets too high. If the valve must operate, something in the system is wrong and should be addressed by a mechanic.
18 . To inspect slack adjusters on S-cam brakes, you need to:
Chock the wheels and disengage the parking brake.
Check each slack adjuster after parking on level ground, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.
See the exact questions that will be on the 2025 Wisconsin DMV exam.
99.2% of people who use the cheat sheet pass the FIRST TIME
Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
Cameron tells us how he purchased the CDL exam, and found it to be a useful tool which helped him pass the exam and find a job.
2025 Wisconsin | Frequently Asked Questions
A CDL Class B license in Wisconsin allows the holder to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not exceeding 10,000 pounds. This typically includes buses, dump trucks, delivery trucks, and other similar vehicles. It does not cover operation of Class A vehicles.
A Class B CDL (Commercial Driver's License) in Wisconsin allows you to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not exceeding 10,000 pounds. This typically includes buses, dump trucks, tow trucks, delivery trucks, and straight trucks.
To acquire a Class B CDL license in Wisconsin, you must be at least 18 years old (21 for interstate driving), possess a valid Wisconsin driver's license, pass a vision test, and successfully complete a knowledge test. You'll also need to pass a skills test in the type of vehicle you plan to drive. Medical clearance may also be required.
In Wisconsin, you must be at least 18 years old to qualify for a Class B CDL license. However, to drive a commercial vehicle across state lines (interstate driving) or to transport hazardous materials, you must be at least 21 years old.
Yes, specific endorsements may be necessary for a Class B CDL license depending on the type of vehicle you plan to drive or the cargo you will carry. These can include passenger, school bus, tanker, or hazardous materials endorsements. Each endorsement requires passing additional knowledge and/or skills tests.
The Class B CDL skills assessment in Wisconsin includes three parts: the pre-trip vehicle inspection, basic vehicle control, and on-road driving. You will be tested on your ability to inspect your vehicle, control the vehicle at low and high speeds, and navigate through traffic and intersections safely.
Yes, Class B CDL license holders in Wisconsin are restricted to operating vehicles with a Gross Vehicle Weight Rating (GVWR) of more than 26,000 pounds, or towing vehicles not more than 10,000 pounds. They cannot operate Class A vehicles unless they have the appropriate endorsements. They are also subject to federal driving regulations.
Yes, in Wisconsin, the written Class B CDL test is available in English and Spanish. However, the Federal Motor Carrier Safety Administration requires that all CDL holders understand and read English well enough 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 in Wisconsin if you have a disability. The Wisconsin Department of Transportation provides reasonable testing accommodations under the Americans with Disabilities Act. You'll need to provide documentation of your disability and specify the type of accommodation you need when scheduling your exam.
Yes, you can retake the Class B CDL written test in Wisconsin if you fail on your first attempt. You're allowed to retake the test the next day. However, if you fail three times, you will need to wait until your eligibility is renewed, which is typically a period of 6 months, before you can try again.
