Air Brakes #2
Air Brakes Endorsement Test | Alabama 2025 #2 Page 2 of 4
Train for FREE online with our Alabama 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 AL 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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7 . What should happen before the air pressure in an air brake system tank falls below 55 psi?
The low air pressure warning signal must activate before the air supply pressure drops below 55 psi in the air tank. If the warning signal does not turn on when being tested during an inspection, the vehicle is not safe to drive.
8 . If the low air pressure warning signal comes on, you should:
If the low air pressure warning signal comes on while you are driving a vehicle with air brakes, you should immediately bring the vehicle to a safe stop while you are still able to control the brakes. Inspect and repair the brakes as soon as possible.
9 . All air tanks must include:
A warning sticker.
Air brake system tanks must contain drain valves. These valves are used to drain accumulated oil and water from the tanks and may be either manually or automatically operated.
10 . During a static leakage test, the maximum leakage rate for a double combination vehicle is:
4 psi in one minute.
When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
11 . What is a wig wag?
A part within the braking unit that allows air to move freely
A wig wag is a type of low air pressure warning device in an air brake system. It drops a mechanical arm into the driver's view when the air pressure in the tanks falls below 60 psi.
12 . What can happen if the air pressure gets too low in an air brake system?
The brakes will be very sensitive.
Pressing and releasing the brake pedal unnecessarily can let air out faster than the compressor can replace it, reducing the available air pressure. If the air pressure in an air brake system gets too low, the brakes will no longer work.
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2025 Alabama | Frequently Asked Questions
To secure a CDL Bus endorsement in Alabama, you must first have a valid Commercial Driver's License (CDL). Then, you need to pass the Passenger Vehicles endorsement written test. After passing the written test, you will need to complete a skills test in the type of vehicle you plan to drive. The Alabama Law Enforcement Agency (ALEA) administers these tests.
To obtain a CDL Bus license in Alabama, you must have a valid driver's license, pass a medical examination, and complete a CDL application. You need to pass the General Knowledge test, the Passenger Endorsement written test, and the School Bus Endorsement written test if applicable. Finally, you need to successfully complete a skills test in an appropriate vehicle.
While Alabama doesn't mandate specific training for a CDL Bus endorsement, it's beneficial to undergo professional training to learn about bus-specific regulations, safety considerations, and operation. Experience is not required, but you must pass the General Knowledge Test, Passenger Endorsement Test, and a skills test in a vehicle similar to the one you'll be driving.
CDL Bus licenses in Alabama fall into three classifications: Class A, B, and C. Class A is for vehicles with a combined weight over 26,001 lbs., where the vehicle being towed is over 10,000 lbs. Class B is for single vehicles over 26,001 lbs. 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 in Alabama. The vehicle used for the test must match the type and class of vehicle that matches the CDL license you are seeking. For a bus endorsement, you need to test in a bus of the appropriate size and type.
During the CDL Bus driving test in Alabama, your driving skills will be evaluated. These include pre-trip inspection, basic vehicle control, and on-road driving. You may be asked to perform maneuvers such as parallel parking, backing up, making turns, and navigating intersections. Your ability to handle bus-specific operations like loading/unloading passengers, use of emergency exits, and understanding special traffic rules for buses will also be tested.
Yes, to obtain a CDL Bus endorsement in Alabama, applicants must pass a Department of Transportation (DOT) physical examination. This exam ensures drivers have no medical conditions that could affect their ability to operate a commercial vehicle safely. It includes vision and hearing tests, blood pressure checks, and assessments for conditions like diabetes or heart disease.
No, it's illegal to transport passengers in Alabama without a valid CDL Bus endorsement. This endorsement is required for drivers who operate a vehicle designed to transport 16 or more passengers, including the driver. Failure to have the appropriate endorsement can result in fines, license suspension, or even jail time.
You can add the CDL Bus endorsement to your existing CDL in Alabama. You don't need a new application. However, you must pass the Passenger Transport test and a skills test in a vehicle similar to the one you'll be driving. After passing these tests, the endorsement can be added to your license.
Yes, there are restrictions. Drivers with a CDL Bus endorsement must adhere to federal and state transportation laws, including hours-of-service rules, which limit the number of hours they can drive without rest. They must also pass regular physical examinations to ensure they're fit to drive and maintain a clean driving record. Violations can result in endorsement suspension or revocation.
