Air Brakes #2
Air Brakes Endorsement Test | Louisiana 2025 #2 Page 4 of 4
Train for FREE online with our Louisiana 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 LA 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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19 . What is removed when an air tank is drained?
In an air brake system, air tanks have drains to remove accumulations of water and compressor oil. Allowing water and oil to accumulate in the system could cause damage to the brakes.
20 . If the safety relief valve in the air brake system releases air:
An air brake system has a safety relief valve, which releases air from the tanks if the pressure gets too high. If the valve must operate, something in the system is wrong and should be addressed by a mechanic.
21 . Truck tractors with air brakes built on or after March 1, 1997 must have:
Truck tractors with air brakes built on or after March 1, 1997, and other vehicles with air brakes built on or after March 1, 1998, must be equipped with anti-lock brakes.
22 . In a vehicle with dual parking control valves, a separate air tank can be used:
In a vehicle with dual parking control valves, there is a separate air tank that can be used to temporarily release the spring brakes if they have been activated due to low air pressure. Pushing in the proper control will release the spring brakes for a short period of time, allowing the driver to move the vehicle in an emergency.
23 . When leaving your vehicle unattended:
Always apply the parking brake when leaving your vehicle unattended.
24 . Do not operate a vehicle if any brake drums have cracks that are larger than ____ of the width of the friction area.
Before beginning a trip, it is important to check the brake drums during your walk-around inspection. It is unsafe to drive if any brake drum has a crack more than one half of the width of the friction area.
25 . ABS brakes:
The purpose of an Anti-Lock Braking System (ABS) is to prevent a vehicle's wheels from locking up when the driver brakes hard on a slippery surface.
See the exact questions that will be on the 2025 Louisiana DMV exam.
99.2% of people who use the cheat sheet pass the FIRST TIME
Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
Cameron tells us how he purchased the CDL exam, and found it to be a useful tool which helped him pass the exam and find a job.
2025 Louisiana | Frequently Asked Questions
To secure a CDL Bus endorsement in Louisiana, you must first hold a valid Commercial Driver's License (CDL). Next, you need to pass the Passenger Transport Test and the School Bus Endorsement Test. Additionally, you must complete a background check, physical exam, and a skills test in the type of bus you'll be driving. Check with the Louisiana Office of Motor Vehicles for specifics.
To obtain a CDL Bus License, you need a valid driver's license and must be at least 21 years old. You'll need to pass a series of written exams, including General Knowledge, Passenger Transport, and School Bus Endorsement tests. A physical exam is required, as well as a skills test in the type of bus you'll be driving. A background check is also necessary.
Yes, specific training is necessary for a CDL Bus endorsement. Applicants must complete a state-approved commercial driver's training course. This course includes both classroom instruction and practical skills training. After the course, applicants must pass a written knowledge test and a skills test, which includes vehicle inspection, basic controls, and on-road driving.
CDL Bus licenses fall under three main 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 is for vehicles designed to transport 16 or more passengers including the driver.
No, you cannot use your personal vehicle for the CDL Bus driving test. The vehicle you use for the test must match the type and class of CDL you are applying for. For a bus endorsement, you need to test in a bus of the appropriate size. The vehicle must also meet all legal requirements for safety and operation.
The CDL Bus driving test evaluates several skills. These include pre-trip vehicle inspection to ensure safety and roadworthiness, basic vehicle control tests such as backing up, and an on-road driving test. The on-road test assesses your ability to handle intersections, railway crossings, curves, and various types of traffic conditions. It also tests your knowledge of bus-specific laws and regulations.
Yes, there are additional medical requirements for a CDL Bus endorsement. Applicants must pass a Department of Transportation (DOT) physical examination every 24 months. This exam evaluates vision, hearing, blood pressure, and checks for conditions like diabetes and epilepsy that could interfere with safe driving. The results are documented on a DOT medical certificate.
No, it is not permissible to transport passengers without a valid CDL Bus endorsement in Louisiana. Operating a commercial vehicle such as a bus requires specific training and licensing. If you're caught driving without the appropriate endorsement, you could face heavy fines, license suspension, and even jail time. Always ensure your CDL endorsements are current and valid before driving.
Yes, the CDL Bus endorsement can be added to your existing Commercial Driver's License (CDL) in Louisiana. You will need to pass the passenger endorsement knowledge test, and if you're driving a school bus, you'll also need to pass the school bus endorsement test. No new application for a CDL is required, just the specific tests for the endorsement.
Yes, there are restrictions for drivers with a CDL Bus endorsement in Louisiana. Drivers must not have any serious traffic violations in the past three years. They must also pass a physical examination every two years and comply with drug and alcohol testing rules. Furthermore, bus drivers are required to maintain a logbook documenting their hours to ensure they do not exceed the maximum allowed driving hours.
