South carolina Driver's Examination

Air Brakes #1

FREE Air Brakes Endorsement Test Online | South Carolina 2024

Train for FREE online with our South Carolina 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 SC Class A/Class B driver 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 the requirements for CDL may vary from state to state.

Number of Question 25

Passing Score 20

Number of Tests 20

1 . Water and compressor oil are usually found in the compressed air within an air brake system. Water and compressor oil:

Are necessary for the proper function of the air brake system.

Should be added if low.

Should be removed regularly.

Are not concerns.

Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.

2 . To use the stab braking method, you should:

Apply the brakes completely until the wheels lock up, release the brakes until the wheels start rolling, then repeat the process.

Apply the brakes about halfway, but allow the wheels to keep rolling.

Apply the brakes completely until the wheels lock up and the vehicle stops.

Apply the emergency brake until the vehicle starts to slow.

The stab braking method for emergency stops involves fully applying the brakes until they lock up. The brakes are then released until the wheels start rolling, and then the process is repeated.

3 . If the low pressure warning light comes on while you are driving:

Braking will only be possible if there is still enough air in the tanks.

You can apply the brakes 14 times before the air in the system runs out.

You should continue to drive normally and check the brake system when it is convenient.

You should stay at least 100 feet away from other vehicles.

When driving a vehicle with air brakes, if the low air pressure warning light comes on, it is important for you to stop and safely park your vehicle as soon as possible. There may be a leak in the system. Controlled braking will remain possible only as long as there is enough air left in the tanks.

4 . To use the stab braking method in an emergency situation, you should:

Apply the brakes completely until the wheels lock up, release the brakes until the wheels start rolling, then repeat the process.

Apply the brakes about halfway, but keep the wheels rolling.

Fully apply the brakes, let the wheels lock up, and hold the brake pedal down, keeping the wheels locked until the vehicle stops.

Apply the emergency brake.

The stab braking method for emergency stops involves fully applying the brakes until they lock up. The brakes are then released until the wheels start rolling, then the process is repeated.

5 . What kind of force must emergency brakes use?

Air pressure

Mechanical

Heavy

Electrical

Because air pressure can eventually leak away, the emergency brakes in an air brake system must be held on by mechanical force.

6 . An air brake-equipped vehicle traveling at a speed of 55 mph under ideal driving conditions will need approximately ____ to come to a complete stop.

100 feet

250 feet

300 feet

450 feet

A vehicle's total stopping distance is made up of perception distance, reaction distance, brake lag distance, and braking distance. With all of these factors included, an air brake-equipped vehicle traveling at a speed of 55 mph under ideal driving conditions will need approximately 450 feet to come to a complete stop.

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2024 South Carolina | Frequently Asked Questions

To obtain a CDL Hazmat endorsement in South Carolina, you must have a valid Commercial Driver's License (CDL). Then, pass the written Hazardous Materials (HazMat) test at a DMV office. You'll also need to undergo a federal background check and fingerprinting. A Transportation Security Administration (TSA) security threat assessment will be conducted before granting the endorsement.

To obtain a CDL Hazmat license, you must first hold a valid Commercial Driver's License (CDL). You should be at least 21 years old and have good driving records. You also need to pass a written Hazardous Materials (HazMat) test. Furthermore, you must pass a federal background check, fingerprinting, and Transportation Security Administration (TSA) security threat assessment.

When applying for a CDL Hazmat endorsement, you'll need to provide your current valid CDL, proof of U.S. citizenship or lawful permanent residency (like a birth certificate or green card), and proof of identity. You'll also need to complete the Hazmat endorsement application and provide fingerprints for the background check. Lastly, you must pass the written Hazmat knowledge test.

Yes, there is a dedicated written test for the CDL Hazmat endorsement. The Hazardous Materials Endorsement Knowledge Test is designed to assess your understanding of the safe transportation of hazardous materials. The test covers topics including loading and unloading, bulk packaging, and emergency response information. It's an essential part of obtaining your Hazmat endorsement.

The written test for the CDL Hazmat endorsement covers various topics, including the identification of different hazardous materials, proper loading and unloading procedures, use of placards and labels, emergency response procedures, and understanding the Hazardous Materials Regulations. It also tests knowledge on how to safely operate a vehicle transporting hazardous materials.

Yes, there are extra charges associated with acquiring a CDL Hazmat endorsement. You will need to pay for the fingerprinting and background check, which can cost around $86.50. Additionally, there may be a fee for the knowledge test and the endorsement itself. Fees can vary, so it's best to check with your local DMV for exact amounts.

Yes, to obtain a CDL Hazmat endorsement, you must undergo a federal background check and fingerprinting. This is part of the Transportation Security Administration's (TSA) security threat assessment. The process helps ensure that hazardous materials are transported safely by checking for criminal history, immigration status, and mental health issues among other factors.

Yes, specialized training is mandatory for the CDL Hazmat endorsement. You must pass a written hazardous materials knowledge test and a TSA security threat assessment. Training typically includes understanding how to handle hazardous materials, emergency response procedures, and safety protocols. The certification is included as an endorsement on your Commercial Driver's License.

No, it's illegal to transport hazardous materials without a valid CDL Hazmat endorsement in South Carolina. The endorsement ensures that you have the necessary training and knowledge to handle and transport hazardous materials safely. Violating this can result in hefty fines, license suspension, or even criminal charges.

Yes, you can add the CDL Hazmat endorsement to your current CDL license in South Carolina. You don't need a new license, but you must pass a written test and a TSA background check. After successful completion, the Hazmat endorsement will be added to your existing CDL license.