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.
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2025 Louisiana | Frequently Asked Questions
A CDL Class A license in Louisiana is defined as a commercial driver's license that allows the holder to operate any combination of vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, provided the towed vehicle is heavier than 10,000 pounds. This typically includes tractor-trailers, truck and trailer combinations, and flatbeds.
A Class A Commercial Driver's License (CDL) in Louisiana allows the holder to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 lbs or more, given that the Gross Vehicle Weight Rating (GVWR) of the vehicle(s) being towed is over 10,000 lbs. This typically includes tractor-trailers, truck and trailer combinations, tank vehicles, livestock carriers, and flatbeds.
To obtain a Class A CDL in Louisiana, you must be at least 21 years old (18 for intrastate driving), possess a valid driver's license, pass a vision exam, and pass a written knowledge test. You'll also need to pass a skills test, which includes a pre-trip vehicle inspection, a basic control skills test, and an on-road driving exam.
In Louisiana, you must be at least 21 years old to qualify for a Class A Commercial Driver's License (CDL) for interstate driving. However, if you're planning to drive only within the state (intrastate), you can apply for a Class A CDL at the age of 18.
While specific endorsements are not required for a Class A CDL, they can expand your job opportunities. Endorsements allow you to operate specific types of vehicles like school buses or tank vehicles, or transport certain types of cargo, such as hazardous materials. Each endorsement requires passing an additional knowledge test, and some require a skills test.
The Class A CDL skills test in Louisiana consists of three parts: the vehicle inspection test, the basic controls test, and the road test. The vehicle inspection test checks your ability to assess if your vehicle is safe to drive. The basic controls test examines your ability to control the vehicle, and the road test assesses your on-road driving skills.
Yes, Class A CDL license holders in Louisiana may face limitations based on their medical condition, driving ability, and the type of vehicle they are licensed to drive. For example, if you can't meet the physical requirements, you may be issued a medical variance or restriction. Also, without specific endorsements, you cannot drive certain types of vehicles or haul specific cargo.
In Louisiana, the written Class A CDL test is primarily offered in English, as federal regulations require all commercial drivers to read and speak English sufficiently to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records. However, assistance in Spanish may be available in some cases.
Yes, Louisiana's Office of Motor Vehicles provides reasonable accommodations for individuals with disabilities taking the Class A CDL written test. Requests for accommodations should be made in advance. Accommodations may include accessible testing locations, extended time, or alternative test formats. It's recommended to contact your local DMV office for specific details and requirements.
If you fail the Class A CDL written test in Louisiana, you can retake it. However, you must wait at least one day before retesting. Keep in mind that there may be additional fees for each retest. It's recommended to study thoroughly using Louisiana's Commercial Driver's License Manual to increase your chances of passing on the next attempt.
