Air Brakes #2
Air Brakes Endorsement Test | Mississippi 2025 #2
Train for FREE online with our Mississippi CDL air brake 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 MS Class A/Class B driver license 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 the requirements for CDL may vary from state to state.
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1 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If the air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
2 . At what psi is the safety valve set to open?
500 psi
In an air brake system, the first tank that receives compressed air has a safety valve that releases air if the pressure gets too high. It is usually set to open at 150 psi. If the valve must open, there is a fault in the system that should be repaired by a mechanic.
3 . Spring brakes come on:
When the brakes are noisy.
Spring brakes come on automatically when air pressure drops to an unsafe psi level. Instead of waiting for the spring brakes to automatically activate, you should safely exit the road as soon as you notice the low pressure warning signal and bring your vehicle to a stop while you are still able to control the brakes.
4 . Which part of the truck is the air compressor connected to?
The door latch
In an air brake system, the air compressor is connected to the engine through gears or a v-belt.
5 . If using air tanks with manually operated drains, how often should you drain the tanks?
Once every six months
In an air brake system with manually operated drains, the tanks should be drained at the end of each day of driving.
6 . All air tanks must include:
A warning sticker.
Air brake system tanks must contain drain valves. These valves are used to drain accumulated oil and water from the tanks and may be either manually or automatically operated.
See the exact questions that will be on the 2025 Mississippi DMV exam.
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2025 Mississippi | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in Mississippi, you must already possess a Commercial Driver's License (CDL). Then, pass the Hazardous Materials Knowledge Test at your local DMV. After passing, you'll need to undergo a TSA background check. Once cleared, pay the endorsement fee to have the Hazmat endorsement added to your CDL.
To obtain a CDL Hazmat license, you must first have a Commercial Driver's License (CDL). Then, you need to pass the Hazardous Materials Knowledge Test. You should be at least 21 years old, have no disqualifying criminal offenses, and pass a TSA Security Threat Assessment. It's also recommended to have good driving records and physical health.
When applying for a CDL Hazmat endorsement, you need to provide proof of U.S. citizenship or lawful permanent residency (like a passport or birth certificate), your valid Mississippi driver's license, and your Social Security number. You also need to submit a Medical Examiner's Certificate, proof of residency in Mississippi, and complete the TSA background check.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. This test covers topics like loading and unloading hazardous materials, bulk packaging marking, driving and parking rules, and emergency response procedures. Passing this test is necessary to receive the Hazmat endorsement on your Commercial Driver's License (CDL).
The written test for the CDL Hazmat endorsement covers various subjects, including identification of hazardous materials, loading and unloading procedures, use of placards and labels, emergency response procedures, and federal regulations related to hazardous materials transportation. It also tests knowledge on the handling and transport of specific types of hazardous materials.
Yes, there are extra charges linked to acquiring a CDL Hazmat endorsement. Costs can include the application fee, fingerprinting fee, and background check fee. However, these fees can vary by state and the specific type of endorsement. It's recommended to check with your local DMV or similar agency for the most accurate and up-to-date information.
Yes, background checks and security clearances are mandatory for the CDL Hazmat endorsement. The Transportation Security Administration (TSA) conducts a federal background check, including fingerprinting. The applicant must not have any disqualifying criminal offenses. This process ensures that hazardous materials are transported safely and securely by trustworthy individuals.
Yes, specialized training is mandatory for the CDL Hazmat endorsement. Applicants must pass a written test to demonstrate knowledge of hazardous materials. After passing the test, they receive a certificate of completion. This certification is then used to obtain the Hazmat endorsement on a CDL. The endorsement must be renewed periodically, which may require additional training or testing.
No, you cannot legally transport hazardous materials without a valid CDL Hazmat endorsement in Mississippi. This endorsement is required by federal law and ensures that drivers are properly trained to handle and transport hazardous materials safely. Violating this law can result in severe penalties, including fines and suspension of your CDL.
Yes, you can add the CDL Hazmat endorsement to your current CDL license. You don't need to apply for a new license. However, you will need to pass a written test and undergo a TSA security threat assessment, which includes fingerprinting and a background check. Once you've passed these, the endorsement can be added to your existing CDL.
