Air Brakes #1
Air Brakes Endorsement Test | Tennessee 2025 #1 Page 2 of 4
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 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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7 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.
A one-way check valve is required to be between an air compressor and the first main reservoir. This valve prevents air from escaping the system if the air compressor develops a leak.
8 . Emergency brakes:
All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes.
9 . During an applied leakage test, the maximum leakage rate for a double combination vehicle is ____ in a minute.
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.
10 . 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?
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.
11 . A low air pressure warning signal:
A vehicle with air brakes must be equipped with a low air pressure warning signal. If the warning signal goes off while a vehicle is being driven, the driver should bring the vehicle to a complete stop and have the system repaired.
12 . A ____ allows a driver to gradually apply spring brakes.
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.
2025 Tennessee | Frequently Asked Questions
To secure a CDL Bus endorsement in Tennessee, you must first hold a valid Commercial Driver's License (CDL). Then, pass the Passenger Vehicles endorsement written test, which covers topics like vehicle inspection, loading/unloading passengers, and emergency procedures. After passing the written test, you'll need to pass a skills test in a vehicle similar to the one you'll be driving.
To obtain a CDL Bus license in Tennessee, you need to have a valid driver's license, pass the CDL general knowledge test, and the passenger endorsement test. You also need to pass a medical examination, provide proof of residency and identity, and complete a skills test in the type of vehicle you will be driving. Finally, you must pay the required fees.
Yes, specific training is necessary for a CDL Bus endorsement in Tennessee. Applicants must pass the Passenger Vehicles endorsement written test and a skills test in a vehicle similar to the one they'll be driving. While not required by the state, many choose to attend a professional training school to prepare for these tests and gain practical driving experience.
CDL Bus licenses fall under three classifications: Class A, B, and C. Class A is for vehicles with a combined weight over 26,001 pounds, where the vehicle being towed is over 10,000 pounds. Class B is for single vehicles over 26,001 pounds or towing a vehicle not over 10,000 pounds. Class C covers vehicles designed to transport 16 or more passengers (including the driver), or hazardous material transport.
No, you cannot use your personal vehicle for the CDL Bus driving test. The vehicle used for the test must match the class and type of vehicle you will be driving with your CDL. For a bus endorsement, you would need to take the test in a bus-like vehicle. This ensures you can handle the specific type of vehicle safely.
During the CDL Bus driving test in Tennessee, candidates are evaluated on their ability to inspect their vehicle, manage space around their vehicle, control speed and stop, start and move the bus smoothly and safely. They're also assessed on their ability to turn, merge into traffic, back up the bus, navigate intersections and railroad crossings, and respond to emergency situations.
Yes, for a CDL Bus endorsement in Tennessee, applicants must pass a Department of Transportation (DOT) medical examination. This examination assesses physical and mental health to ensure drivers can safely operate a commercial vehicle. Conditions evaluated include vision, hearing, blood pressure, and medical conditions like epilepsy or heart disease that could impact driving ability.
No, it is not permissible to transport passengers without a valid CDL Bus endorsement in Tennessee. The law requires all drivers who operate a vehicle designed to carry 16 or more passengers, including the driver, to have a Commercial Driver's License (CDL) with a Passenger (P) endorsement. Driving without the proper license or endorsement can lead to serious penalties.
You can add a CDL Bus endorsement to your existing commercial driver's license in Tennessee. You don't need to apply for a new license. However, you must pass the passenger transport test, a pre-trip vehicle inspection test, and a skills test. A road skills test in the type of vehicle you'll be driving is also required.
Yes, there are restrictions for drivers with a CDL Bus endorsement in Tennessee. For instance, bus drivers must comply with hours-of-service regulations, which limit the number of hours they can drive without rest. Additionally, they must maintain a clean driving record and pass regular physical examinations. Violations like DUIs or reckless driving can lead to suspension or revocation of the endorsement.