Knowledge Test Class B #1
Class B Driving Test | Alabama 2026 #1 Page 6 of 7
Train for FREE online with our Alabama class B license 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 CDL class B permit 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 CDL class B requirements may vary from state to state.
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36 . How is water and compressor oil removed from the bottom of an air storage tank?
A sponge is used to soak up the water and oil.
Water and compressor oil are removed from air storage tanks through a drain valve. The water and oil can damage the brakes if left to accumulate in the system. Manually operated tanks must be drained every day to remove this build-up.
37 . If you are being tailgated, you should:
Allow the vehicle to pass.
If someone is tailgating you, it is a good idea to open up the space ahead of your vehicle to make it easier for the driver to pass you. Increasing your speed is not a good idea because the driver may continue to tailgate you at the higher speed, only increasing the danger.
38 . What can change the height of a vehicle?
Number of windows
The added weight of a heavy load will make a vehicle sit lower than usual. A vehicle will often be taller when carrying a light load than when carrying a heavy load. If your vehicle fits under an overpass while carrying a full load, it is not guaranteed that it will fit under the same overpass if it is empty.
39 . The best way to avoid glare at night from oncoming vehicles is to:
Use your high beams.
To avoid being blinded by the lights of oncoming vehicles, you can glance to the right side of the road until the vehicle has passed.
40 . A cardboard box on the roadway:
Almost any foreign object on the road poses some potential danger. For example, even something as seemingly harmless as a cardboard box could contain a hard or heavy object that could damage your vehicle.
41 . The application pressure gauge:
Shows the number of times the brakes have been used.
In an air brake system, the application pressure gauge shows how much air pressure is being applied to the brakes. Not all vehicles with an air brake system have this gauge.
42 . A stopped bus:
You should always exercise caution when driving near a stopped bus. There could be passengers in the vicinity and the bus may either prevent them from seeing you or you from seeing them.
See the exact questions that will be on the 2026 Alabama DMV exam.
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2026 Alabama | Frequently Asked Questions
A CDL Class A license in Alabama allows holders to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, provided the towed vehicle(s) have a GVWR of more than 10,000 pounds. This typically includes tractor-trailers, truck and trailer combinations, tank vehicles, livestock carriers, and flatbeds.
A Class A CDL license in Alabama allows operation of combination vehicles like tractor-trailers, truck and trailer combinations, and tank vehicles. It also includes operating flatbeds, livestock carriers, and any vehicle towing another vehicle over 10,000 pounds. Basically, it covers vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more.
To obtain a Class A CDL license in Alabama, you must be at least 21 years old (18-20 years for intrastate driving), have a valid Alabama driver's license, pass a vision test, and complete a written knowledge test. Additionally, you'll need to pass a skills test which includes a pre-trip vehicle inspection, a basic controls test, and an on-road driving exam.
In Alabama, you must be at least 18 years old to qualify for a Class A CDL for intrastate driving (within Alabama only). However, if you plan to drive interstate (across state lines) or haul hazardous materials, federal regulations require you to be at least 21 years old.
Endorsements are not required for a Class A CDL license in Alabama, but they can broaden the range of vehicles you can operate. For example, a T endorsement allows you to tow double or triple trailers, an H endorsement permits hazardous materials transport, while a P endorsement allows passenger vehicle operation. These endorsements require additional testing.
The Class A CDL skills test in Alabama includes three parts: a pre-trip vehicle inspection to verify your ability to assess the safety of your vehicle, a basic controls test to evaluate your basic maneuvering skills, and an on-road driving examination to demonstrate your practical driving abilities under various traffic conditions.
Yes, Class A CDL license holders in Alabama may face certain limitations. These can be based on the driver's medical condition, driving ability or the type of vehicle driven. For example, a driver may have restrictions for not wearing corrective lenses, not driving a manual transmission, or not operating a truck with full air brakes.
In Alabama, the written Class A CDL test is primarily offered in English. However, some locations may provide the test in Spanish. It's important to note that even if the written test is passed in another language, all drivers must demonstrate a basic understanding of English to communicate with officials and complete the required forms.
Yes, you can request accommodations for the Class A CDL written test if you have a disability. The Americans with Disabilities Act requires test centers to provide reasonable accommodations. These may include extra time, a quiet room, or a reader. Contact your local DMV in Alabama to discuss your specific needs and arrange appropriate accommodations.
Yes, if you don't pass the Class A CDL written test in Alabama, you can retake it. There is a waiting period of one day before you can retake the exam. Also, you may be required to pay a retesting fee. It's advisable to study the CDL manual thoroughly before reattempting the test.
