Knowledge Test Class B #1
Class B Driving Test | Louisiana 2025 #1 Page 4 of 7
Train for FREE online with our Louisiana 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 LA 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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22 . Air tank drains should:
In an air brake system, air tank drains are used to remove water and compressor oil from the air tanks. When operating a drain, be sure to drain the tank completely.
23 . If you remain in neutral for too long while switching gears:
If you remain in neutral for too long while switching gears, you may have difficulty putting the vehicle into the next gear. If this happens, do not try to force the gear shift. Instead, return to neutral, release the clutch, increase the engine speed to match the road speed, and try again.
24 . When checking tires, which of the following should not cause concern?
When checking the tires as part of a pre-trip inspection, make sure the tires have sufficient tread. There should be at least 4/32 of an inch of tread in every major groove of the front tires, and at least 2/32 of an inch of tread depth on the other tires. Tires should not be mismatched in size and radial and bias-ply tires should not be used together.
25 . When it is difficult to see and you are traveling near other drivers, you should:
Use your low beam headlights when traveling near other drivers at times when it is difficult to see, such as at dawn, at dusk, or in poor weather conditions. Using the high beam setting under certain conditions could make it difficult for other drivers to see.
26 . When backing with a trailer, turning toward the driver’s side is encouraged because:
When driving in reverse, it is always recommended that a driver backs their vehicle toward its left side. This will allow the driver the best possible view of the rear of their vehicle.
27 . The air storage tanks:
The air storage tanks in an air brake system store compressed air to be used for braking. They hold enough air for the brakes to still be used several times if the compressor stops working.
28 . Belts in the engine compartment should:
When inspecting your vehicle's engine, check the belts for tightness and excessive wear. The amount of "give" that is safe for each belt in a given engine will vary, so learn what is appropriate for your vehicle.
See the exact questions that will be on the 2025 Louisiana DMV exam.
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2025 Louisiana | Frequently Asked Questions
To acquire a CDL Tank endorsement in Louisiana, you need to pass the tank vehicle test. This involves studying the CDL manual, especially the section on tank vehicles. Then, you must schedule and take the test at your local DMV. Passing the test will add the Tank endorsement to your CDL. Always check with your local DMV for specific requirements.
To obtain a CDL Tank license, you must first have a Commercial Driver's License (CDL). You then need to pass the Tank Vehicle endorsement test. This would require studying the tank vehicle section in the CDL manual. After studying, schedule your test at the local DMV. Passing this test will add the Tank endorsement to your CDL.
While specific training or experience is not legally mandatory for a CDL Tank endorsement, it can be beneficial. Knowledge of handling and operating tank vehicles safely is crucial, and this can be gained through training or experience. However, the key requirement is passing the tank vehicle test after studying the relevant sections in the CDL manual.
Yes, to obtain a CDL Tank endorsement, you must pass an additional written test. The test covers specific knowledge related to the safe transportation of liquid and gaseous materials in tank vehicles. You can prepare for this test by studying the tank vehicle section in your state's Commercial Driver's License manual.
The written test for the CDL Tank endorsement includes subjects related to operating a tank vehicle. Topics include understanding high center of gravity, handling surge, inspecting tank vehicles, and safety considerations. The test aims to ensure drivers can safely handle the unique characteristics of driving a tank vehicle.
The CDL Tank endorsement assessment doesn't involve a specific skills or maneuvers test. It is a written exam that evaluates your knowledge of safely operating tank vehicles. Topics include understanding the vehicle's structure, handling high center of gravity, inspecting tanks, and dealing with surge effects. Practical skills are assessed under the general CDL driving test.
There aren't specific limitations for drivers with a CDL Tank endorsement. However, drivers must comply with federal and state regulations, including hours of service rules, weight limits, and hazardous materials restrictions. Additionally, some employers may have their own rules regarding experience, age, or physical condition. Also, driving under the influence can result in endorsement revocation.
No, a valid CDL Tank endorsement is required to transport liquid or gas materials in the United States. This endorsement ensures that drivers have the necessary knowledge and skills to safely operate tank vehicles and handle potential hazards associated with these types of materials. Driving without the proper endorsement can result in fines or legal action.
The CDL Tank endorsement can be added to your current commercial driver's license. You don't need to apply for a new license. However, you will need to pass the Tank endorsement written test. Once you pass the test, the Tank endorsement will be added to your existing CDL.
Yes, to handle hazardous materials with a CDL Tank endorsement, you must also have a Hazardous Materials (HazMat) endorsement. This requires passing a written test and a TSA background check. Additionally, you must follow the Federal Motor Carrier Safety Administration's safety regulations when transporting hazardous materials.
