Knowledge Test Class B #2
Class B Driving Test | Alabama 2026 #2 Page 7 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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43 . What is often found in compressed air?
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.
44 . Items on a flatbed:
On flatbed trailers and trailers without sides, cargo must be tied down to prevent it from shifting or falling off in transit.
45 . If you identify a distracted driver on the road, you should:
Flash your lights at them.
If you encounter a distracted driver, make sure to give them plenty of room. Be very careful if you pass their vehicle because the driver may be unaware of your presence and drift into your lane.
46 . The two markings on a front brake limiting valve usually read:
Some vehicles with air brake systems manufactured before 1975 have a front brake limiting valve with "normal" and "slippery" settings.
47 . Front brake limiting valves were intended to:
Remove uncertainty when applying the brakes.
Some older vehicles with air brakes have front brake limiting valves. These valves were intended to reduce the risk of front wheels skidding. However, research has shown that such devices are unnecessary, so they should be left in the "normal" position.
48 . If the safety relief valve in the air brake system releases air:
An air brake system has a safety relief valve, which releases air from the tanks if the pressure gets too high. If the valve must operate, something in the system is wrong and should be addressed by a mechanic.
49 . Cargo inside a trailer:
Cargo inside a trailer must be secured appropriately to prevent it from shifting in transit.
50 . What should you do if the braking system cannot build up hydraulic pressure?
If your hydraulic braking system will not build up the pressure needed to slow or stop your vehicle, there are a few possible solutions. Try shifting into a lower gear, pumping the brakes, and/or using the emergency brake.
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2026 Alabama | Frequently Asked Questions
To acquire a CDL Tank endorsement in Alabama, you must first possess a Commercial Driver's License (CDL). Then, you need to pass the Tank Vehicle Endorsement Knowledge test, which covers the proper handling and driving of tank vehicles. Studying the Alabama CDL Manual can assist in preparing for this test. After passing, you will receive the Tank endorsement on your CDL.
To obtain a CDL Tank license, it's essential to first have a Commercial Driver's License (CDL). You must then pass the Tank Vehicle Endorsement Knowledge test, which focuses on the correct handling and driving of tank vehicles. It's important to thoroughly study the Alabama CDL Manual to prepare for this test. Upon passing, you'll receive your CDL Tank endorsement.
While Alabama does not mandate specific training or experience for a CDL Tank endorsement, you must pass the Tank Vehicle Endorsement Knowledge test. This test covers the handling and driving of tank vehicles. Studying the Alabama CDL Manual can help prepare for this test. Practical experience or training could be beneficial, but it is not a legal requirement.
Yes, to obtain a CDL Tank endorsement in Alabama, you need to pass the Tank Vehicle Endorsement Knowledge test. This test is in addition to the general CDL test. It covers specific knowledge related to the safe operation and handling of tank vehicles. Studying the Alabama CDL Manual can help you prepare for this exam.
The written test for the CDL Tank endorsement in Alabama covers several topics related to tank vehicles. These include inspecting tank vehicles, driving tank vehicles, and safe handling of liquid cargo. It also includes understanding the high center of gravity in tank vehicles, checking for leaks, and emergency procedures. The Alabama CDL Manual provides detailed information on these subjects.
During the CDL Tank endorsement assessment, skills such as safe driving techniques, proper loading and unloading procedures, handling high center of gravity, and understanding outage requirements are evaluated. Additionally, applicants must demonstrate knowledge of emergency response procedures and understanding of how to inspect tank vehicles for safety issues.
Yes, drivers with a CDL Tank endorsement must follow specific rules. They must not drive a tank vehicle unless it's empty if they lack the endorsement. This also applies to tanks that were previously used to transport hazardous materials unless purged of any residue. Additionally, drivers must comply with all federal and state regulations regarding the transport of hazardous materials.
No, a valid Commercial Driver's License (CDL) with a Tank endorsement is required to transport liquid or gaseous materials in a tank or tanks having an individual rated capacity of more than 119 gallons and an aggregate rated capacity of 1,000 gallons or more. Driving such vehicles without the proper endorsement is against federal and state law in Alabama.
You can add the CDL Tank endorsement to your current commercial driver's license. It is not necessary to apply for a new license. However, you will need to pass the Tank Vehicle test, and there may be additional fees involved. Always check with your local DMV for specific requirements and procedures.
Yes, handling hazardous materials requires a Hazardous Materials (HazMat) endorsement in addition to the CDL Tank endorsement. To obtain a HazMat endorsement, you must pass a written test and a Transportation Security Administration background check. It's essential to understand and comply with these regulations for safety and legal reasons.
