Tennessee Driver's Examination

Air Brakes #2

FREE Air Brakes Endorsement Test Online | Tennessee 2024

Train for FREE online with our Tennessee 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 TN 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 . A ____ allows a driver to gradually apply spring brakes.

Modulating control valve

Trailer air supply control

Relay valve

A modulating control valve allows a driver to gradually apply spring brakes. In equipped vehicles, the valve is controlled by a lever located on the dashboard.

2 . In a dual air brake system:

Each system has separate air tanks, hoses, and lines.

The systems share air tanks, but each has its own separate hoses and lines.

Each system uses the same lines and hoses.

One system is the main braking system and a second system is ready to be used if the first one fails.

A dual air brake system is made up of two separate air brake systems. The systems share a single set of brake controls, but each has its own air tanks, hoses, and lines.

3 . Some air brake systems use alcohol:

To reduce the risk of ice forming in air brake valves.

To make the compressor run more efficiently.

To lubricate parts of the braking system.

To reduce the risk of rust forming on air brake valves.

Some air brake systems contain an alcohol evaporator. This device introduces alcohol into the braking system to inhibit the formation of ice.

4 . How much distance will an air brake-equipped vehicle need to come to a complete stop if it is traveling at 55 mph under ideal driving conditions?

300 feet

100 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.

5 . During an applied leakage test, the maximum leakage rate for a double combination vehicle is ____ in a minute.

2 psi

4 psi

6 psi

It is important to know the maximum air loss rate that is safe for your specific vehicle. A double combination vehicle should have a leakage rate no higher than 4 psi in a minute during an applied leakage test.

6 . Air tank drains:

Allow rain water to enter the tanks.

Are used to drain water and oil from the air tanks.

Should never be opened.

Must remain open while driving.

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.

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2024 Tennessee | Frequently Asked Questions

To acquire a CDL Hazmat endorsement in Tennessee, you need to pass a written test, submit fingerprints for a TSA background check, and pay applicable fees. You must already have a valid CDL. You can prepare for the test by studying the Hazmat section of the Tennessee CDL Manual. It's recommended to schedule your test at a local DMV office.

To obtain a CDL Hazmat license, you must already hold a valid Commercial Driver's License (CDL). You'll also need to pass a written Hazmat knowledge test, submit fingerprints for a Transportation Security Administration (TSA) background check, and pay the required fees. Additionally, you must be at least 21 years old and be able to read and speak English well enough to do the job.

When applying for a CDL Hazmat endorsement in Tennessee, you'll need to provide your current valid Commercial Driver's License (CDL), proof of U.S. citizenship or lawful permanent residency (like a passport or birth certificate), and proof of Tennessee residency. You'll also need to complete the TSA security threat assessment application and provide fingerprints for a background check.

Yes, there is a dedicated written test for the CDL Hazmat endorsement. The Hazardous Materials Endorsement Knowledge Test covers specific regulations and procedures related to transporting hazardous materials. The test typically includes questions about loading and unloading, bulk packaging marking, driving and parking rules, and emergency response procedures.

The written test for the CDL Hazmat endorsement covers a variety of topics related to hazardous materials. These include identifying different types of hazardous materials, understanding placarding and labeling requirements, knowing how to safely load and unload hazardous materials, understanding emergency procedures, and being aware of the rules for transporting hazardous materials.

Yes, obtaining a CDL Hazmat endorsement involves additional costs. In Tennessee, there's a $5 fee for the knowledge test and a $66 fee for the Hazardous Materials Endorsement Threat Assessment Program (HME TAP). The fees are subject to change and it's advisable to check with the local DMV for the most current charges.

Yes, a background check is mandatory for a CDL Hazmat endorsement. The Transportation Security Administration (TSA) conducts this check. It involves a review of your criminal history, immigration status, and possible connections to terrorism. A fingerprint-based check is also part of the process. This is to ensure the safety and security of hazardous material transportation.

Yes, specialized training is required for the CDL Hazmat endorsement. Applicants must pass a written test specific to hazardous materials. The test covers relevant topics such as identifying hazardous materials, understanding safety procedures, and following transportation regulations. This knowledge ensures the safe and legal transport of hazardous materials.

No, you cannot legally transport hazardous materials without a valid CDL Hazmat endorsement in Tennessee. The endorsement is required to ensure that drivers have the necessary knowledge and skills to handle and transport hazardous materials safely, in compliance with federal and state regulations. Violating these regulations can result in serious penalties.

You can add the CDL Hazmat endorsement to your existing CDL license. You don't need to apply for a new license. However, you are required to pass a written Hazmat knowledge test and undergo a TSA background check. Once these are successfully completed, the endorsement will be added to your current CDL.