Air Brakes #2
Air Brakes Endorsement Test | Alabama 2026 #2 Page 4 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 2026, 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 . The ____ tells a driver how much pressure is in the air tanks.
Drum brake
A vehicle that is equipped with air brakes must also be equipped with a supply pressure gauge. This gauge tells the driver how much air pressure is in each of the vehicle's air tanks.
20 . When parking, you should not use the parking brake if:
If your brakes are hot after coming down a steep grade, you should not use your parking brake when parking. Let your brakes cool before applying the parking brake or risk damaging the brakes.
21 . If the spring brakes are on, you should:
Be especially careful because the brakes may fail.
You should not apply the brake pedal if the spring brakes are activated. The brakes could be damaged if they are subjected to the force of air pressure and the springs at the same time.
22 . To stop in a vehicle that uses air brakes, the driver should:
Pull the brake pedal up.
To make a normal stop in a vehicle with air brakes, push the brake pedal down. The harder the pedal is pressed, the more air pressure is released.
23 . A low air pressure warning signal should activate:
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.
24 . Anti-Lock Braking Systems (ABS):
If equipped, ABS is in addition to a vehicle's normal braking system and does not increase or decrease the braking power of any other system. ABS only activates when a vehicle's wheels are about to lock.
25 . Brakes may get out of adjustment:
If they get wet.
Brakes can get out of adjustment quickly, especially if they are used to the point of overheating. Brake adjustment should be checked frequently.
See the exact questions that will be on the 2026 Alabama DMV exam.
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Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
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2026 Alabama | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in Alabama, you must have a valid Alabama CDL. Next, pass the Hazardous Materials Endorsement Knowledge Test. Complete a background check and fingerprinting through the Transportation Security Administration (TSA). Finally, submit your application with the required fees to the Alabama Department of Public Safety. Training courses are recommended but not mandatory.
To obtain a CDL Hazmat license, you need to have a valid Commercial Driver's License (CDL). You must also pass the Hazardous Materials Endorsement Knowledge Test. Prior to applying for the endorsement, you must clear a TSA background check. Be aware that certain criminal offenses may disqualify you from obtaining the Hazmat endorsement.
When applying for a CDL Hazmat endorsement, you need to provide a completed application form, proof of U.S. citizenship or lawful permanent residency (like a passport or birth certificate), and your current valid Commercial Driver's License (CDL). A medical examiner's certificate may also be required. Lastly, you must pass the TSA background check and fingerprinting.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. This test covers topics such as loading and unloading hazardous materials, bulk packaging marking, driving and parking rules, and emergency response procedures. Passing this test is mandatory for obtaining the Hazmat endorsement on your Commercial Driver's License (CDL).
The CDL Hazmat endorsement written test covers a range of subjects including: understanding the different types of hazardous materials and their associated risks, proper loading and unloading procedures, correct use of placards and labels, emergency response procedures in case of an incident, and regulations for transport of hazardous materials. It's designed to ensure drivers can safely handle hazardous cargo.
Yes, there are extra charges associated with obtaining a CDL Hazmat endorsement. In Alabama, the endorsement itself costs $20. However, you also need to account for the cost of the TSA background check and fingerprinting, which is approximately $86.50. These prices can vary slightly, so it's best to check the current fees when you apply.
Yes, to receive a CDL Hazmat endorsement, you're required to undergo a federal security threat assessment conducted by the Transportation Security Administration (TSA). This includes a fingerprint-based criminal history records check. The goal is to ensure that you don't pose a security threat and are fit to transport hazardous materials safely.
Yes, specialized training is required for a CDL Hazmat endorsement. This includes passing a written test covering hazardous materials regulations and safe handling procedures. Candidates must also pass a Transportation Security Administration (TSA) background check. While not mandatory, many choose to complete a training course to prepare for the test and handle hazardous materials safely.
No, you cannot transport hazardous materials without a valid CDL Hazmat endorsement in Alabama. The endorsement is required by federal law to ensure that drivers have the necessary knowledge and skills to safely transport hazardous materials. Driving without this endorsement could result in serious penalties, including fines and suspension of your CDL license.
Yes, you can add the CDL Hazmat endorsement to your existing CDL license. You don't need to apply for a new CDL. However, you must pass the Hazmat knowledge test, undergo a TSA background check, and pay the required fees. Once these steps are complete, the endorsement will be added to your current CDL license.
