Air Brakes #2
Air Brakes Endorsement Test | Wisconsin 2025 #2 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 tank endorsement is:
Optional when transporting hazardous materials.
In general, a tank endorsement is required to a drive tank vehicle used to transport liquids or gases. This applies to both hazardous and non-hazardous materials.
15 . Why do you need to drain air tanks regularly?
To remove bad air from the tanks
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Tanks must be drained regularly to remove this build-up.
16 . If using air tanks with manually operated drains, how often should you drain the tanks?
Once every 3,000 miles
To prevent the build up of oil and water in a vehicle's air tanks, manually operated air tank drains should be used at the end of each day of driving.
17 . 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.
18 . If braking at a speed of 55 mph while driving on dry pavement, the brake lag can add ____ to your vehicle's total stopping distance.
10 feet
The total stopping distance for vehicles equipped with air brakes is made up of four factors: perception distance, reaction distance, brake lag distance, and braking distance. When braking at a speed of 55 mph while driving on dry pavement, the brake lag can add around 32 feet to a vehicle's total stopping distance.
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2025 Wisconsin | Frequently Asked Questions
To secure a CDL Bus endorsement in Wisconsin, you must first possess a valid Commercial Driver's License (CDL). Next, pass the passenger endorsement test which covers topics like bus inspection, loading/unloading passengers, and emergency procedures. Finally, complete a driving skills test in the type of bus you'll be driving. This ensures your ability to safely operate a bus in Wisconsin.
To obtain a CDL Bus license in Wisconsin, you must possess a valid driver's license and be at least 21 years old. You need to pass written tests including the General Knowledge Test, Passenger Transport Test, and School Bus Endorsement Test. Additionally, you must pass a Department of Transportation (DOT) physical examination and complete a skills test in the type of bus you'll be driving.
Yes, specific training is necessary for a CDL Bus endorsement in Wisconsin. You must pass a written Passenger Transport Test and a School Bus Endorsement Test. You are also required to complete a skills test in the type of bus you will be driving. It's recommended to take a professional training course to help prepare for these tests.
CDL Bus licenses in Wisconsin are classified into three categories: Class A, Class B, and Class C. Class A is for vehicles with a combined weight over 26,001 pounds, if towing over 10,000 pounds. Class B is for vehicles over 26,001 pounds or towing less than 10,000 pounds. Class C is for vehicles designed to transport 16 or more passengers including the driver.
No, you cannot use your personal vehicle for the CDL Bus driving test. The vehicle used for testing must match the class of CDL you are applying for. In this case, you should use a commercial bus. This ensures you can operate the vehicle safely and are familiar with its functions and features.
The CDL Bus driving test in Wisconsin evaluates several skills such as pre-trip vehicle inspection, basic vehicle control, and on-road driving. You'll be tested on maneuvers like turning, merging, backing up, and navigating intersections. You'll also be evaluated on safety procedures like proper signaling, stopping distances, and obeying traffic signs and signals.
Yes, in Wisconsin, to obtain a CDL Bus endorsement, you need to pass a Department of Transportation (DOT) physical examination. This checks your overall health, eyesight, hearing, and physical abilities to ensure you're fit to operate a commercial vehicle. You'll also need to maintain your DOT medical card and provide it during the CDL application process.
No, it's not permissible to transport passengers without a valid CDL Bus endorsement in Wisconsin. The law requires any driver operating a vehicle designed to carry 16 or more passengers (including the driver) to hold a valid Commercial Driver's License with a Passenger (P) endorsement. Violating this can result in serious penalties.
In Wisconsin, you can add a CDL Bus endorsement to your existing commercial driver's license. You don't need to apply for a new license. However, you must pass the necessary written and skills tests related to passenger transport. Once you pass, the Bus endorsement will be added to your existing CDL.
Yes, there are restrictions for drivers with a CDL Bus endorsement in Wisconsin. Drivers must not have more than one license, the vehicle must not exceed passenger capacity, and seatbelts must be used if fitted. Also, drivers must adhere to hours of service laws to avoid fatigue. Violation of these rules can lead to fines, license suspension or revocation.
