Knowledge Test Class B #1
Class B Driving Test | Alabama 2025 #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 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 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.
