FREE CDL Combination Vehicles Practice Test Online | Louisiana 2024 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 2021, 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.
2024 Louisiana | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in Louisiana, you must have a valid Louisiana CDL. Next, pass the Hazardous Materials Endorsement Knowledge Test. Then, submit fingerprints and undergo a TSA background check. Once cleared, you can apply for the endorsement at a Louisiana Office of Motor Vehicles location. Fees for testing and endorsement apply.
To obtain a CDL Hazmat license, you need a valid Commercial Driver's License (CDL). You must be at least 21 years old and a U.S. citizen or have a valid permanent resident card. You're required to pass the Hazardous Materials Endorsement Knowledge Test and undergo a Transportation Security Administration (TSA) background check. Good driving records are also essential.
When applying for a CDL Hazmat endorsement, you must provide a valid Commercial Driver's License (CDL), proof of U.S. citizenship or lawful permanent residency, and proof of identity. You'll also need to complete a Hazardous Materials Endorsement application form and pass the TSA background check. Be prepared to pay the necessary fees.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. This test evaluates your knowledge about transporting hazardous materials. Topics include identifying different types of hazardous materials, loading and unloading procedures, safety protocols, and emergency response techniques. You must pass this test to obtain the Hazmat endorsement.
The written test for the CDL Hazmat endorsement covers a range of subjects including: identification of hazardous materials, understanding shipping papers, placarding rules, safe loading and unloading procedures, hazard classes, emergency response procedures, and security risks associated with transporting hazardous materials. It's designed to ensure drivers are knowledgeable and can handle potential hazards.
Yes, acquiring a CDL Hazmat endorsement does come with additional charges. These include the cost for the knowledge test, fingerprinting fee, and a federal security threat assessment. The exact fees may vary, so it's recommended to check with your local DMV or equivalent agency in Louisiana for the most accurate information.
Yes, obtaining a CDL Hazmat endorsement requires a background check. The Transportation Security Administration (TSA) conducts this check. It includes a review of your criminal, immigration, and terrorist records. The TSA also requires fingerprinting as part of this process. If you pass the background check, you are eligible to take the Hazmat knowledge test.
Yes, specialized training is required for the CDL Hazmat endorsement. This training includes a written knowledge test. Also, the Federal Motor Carrier Safety Administration mandates that Hazmat drivers must be trained and tested on safe driving, recognizing hazardous materials, emergency situations, and prevention of cargo spills. Training certificates are required as proof.
No, you cannot transport hazardous materials without a valid CDL Hazmat endorsement. This is a federal requirement set by the Federal Motor Carrier Safety Administration. Violating this rule can result in significant penalties, including fines, imprisonment, and disqualification from holding a commercial driver's license.
Yes, you can add the CDL Hazmat endorsement to your current CDL license. You don't need a new application. However, you need to pass the Hazardous Materials Endorsement Knowledge Test and a TSA background check. Once these steps are completed, the Hazmat endorsement will be added to your existing CDL.