Combination #2
Combination Vehicles Practice Test | Louisiana 2024 #2 Page 3 of 3
Train for FREE online with our Louisiana CDL combination vehicle 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 combination license in 2024, 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 DMV requirements for issuing a combination license may vary from state to state.
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15 . Before a trip, you can make sure air flows to all trailers by:
Before a trip, ensure that air in the air brake system reaches all trailers. Do this by waiting for air pressure to build, then sending air to both the emergency and service lines and opening the shut-off valves on the rear of the last trailer. If air escapes from the shut-off valves in the rear of the combination, the air is being supplied to the entire vehicle.
16 . The "crack-the-whip" effect can:
Trailers can overturn as a result of the "crack-the-whip" effect. The last trailer in a combination is the most prone to tip over due to this effect. Drivers should be aware of the rearward amplification of their specific vehicles and drive accordingly.
17 . A tractor protection valve:
A tractor protection valve keeps air in a tractor or truck air brake system should the trailer break away or develop a bad leak. The valve will close automatically if the pressure drops to an unsafe level.
18 . When connecting a converter dolly to a second trailer, the trailer height should be ____ the center of the fifth wheel.
When connecting a converter dolly to a second or third trailer, the trailer height should correct. It should be slightly lower than the center of the fifth wheel.
19 . When should the trailer hand valve be used?
The trailer hand valve, also called the trolley valve or Johnson bar, is used to work the trailer brakes. It should be used only to test the brakes. Using it while a vehicle is in motion could cause a skid.
20 . The emergency air line supplies air to the:
The emergency air line (also known as the supply line) has two functions. The first is to supply air to the trailer air tanks, and the second is to control the emergency brakes on combination vehicles.
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2024 Louisiana | Frequently Asked Questions
A CDL Class B license in Louisiana allows drivers to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not exceeding 10,000 pounds. This includes buses, farm labor vehicles, and any combination of vehicles not defined under Class A.
A Class B CDL license in Louisiana allows the operation of single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or a vehicle towing another not exceeding 10,000 pounds. This includes straight trucks, large buses, segmented buses, box trucks, and dump trucks with small trailers.
To acquire a Class B CDL license in Louisiana, you must be at least 18 years old (21 for interstate driving), possess a valid Louisiana driver's license, pass a vision exam, and complete a written knowledge test. You will also need to pass a skills test, which includes a pre-trip vehicle inspection, a basic controls test, and an on-road driving exam.
In Louisiana, to qualify for a Class B Commercial Driver's License (CDL), you must be at least 18 years old for intrastate driving (within Louisiana only) and at least 21 years old for interstate driving (across state lines or transporting hazardous materials). Other prerequisites include passing a knowledge test and a skills test.
Specific endorsements are not necessary for a Class B CDL license in Louisiana but can broaden your employment opportunities. Endorsements certify additional skills like driving a school bus, tank vehicle, or vehicles carrying hazardous materials. To obtain an endorsement, you must pass specific knowledge tests and, in some cases, a skills test.
The Class B CDL skills assessment in Louisiana encompasses three parts: the pre-trip vehicle inspection, the basic vehicle control test, and the on-road driving test. You'll need to demonstrate knowledge of your vehicle, show that you can control it in a variety of situations, and safely operate it in traffic conditions.
Yes, Class B CDL license holders in Louisiana are limited to operating single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or towing a vehicle not exceeding 10,000 pounds GVWR. They cannot operate Class A vehicles unless they upgrade their license. Furthermore, they must adhere to all federal and state motor carrier safety regulations.
In Louisiana, the written Class B CDL test is typically administered in English. However, some test centers may offer the test in Spanish. It's important to note that even if you take the written test in Spanish, you must still be able to read and speak English well enough to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, you can request test accommodations for the Class B CDL written exam in Louisiana due to disability. The state follows the guidelines of the Americans with Disabilities Act (ADA) and provides reasonable accommodations to individuals who can provide documentation of their disability. It's important to make your request well in advance of your test date.
If you don't pass the Class B CDL written test in Louisiana, you can retake it. However, there's a waiting period before you can retake the test. The waiting period varies but is typically one day. You'll also need to pay a re-examination fee each time you retake the test. It's advisable to study thoroughly before reattempting.
