Air Brakes #2
Air Brakes Endorsement Test | Texas 2025 #2 Page 2 of 4
Train for FREE online with our Texas 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 TX 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 . How many air storage tanks are used in an air brake system?
The number varies.
Air storage tanks are used to hold compressed air. The number and size of air tanks in an air brake system varies among vehicles.
8 . During a walk-around inspection, ensure there are no cracks on the brake drums that are more than ____ of the width of the friction area.
One tenth
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.
9 . What does ABS do?
Prevent the brakes from being used if downshifting would be more effective
The purpose of an Anti-Lock Braking System (ABS) is to prevent wheels from locking up during hard applications of the brakes, especially on slippery surfaces.
10 . During a static leakage test, the maximum leakage rate for a double combination vehicle is:
4 psi in one minute.
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 air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
11 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Keep the control at the halfway mark.
Some pre-1975 vehicles have a front brake limiting valve, which has "normal" and "slippery" settings. The idea behind these valves was to limit the air pressure available to the front brakes when driving on slippery surfaces, and thereby reduce the danger of a front-wheel skid. Studies have found that this is not actually a concern, so if your vehicle has a front brake limiting valve, leave it in the "normal" position.
12 . When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
Alcohol evaporator.
When pressing the brake pedal in a vehicle with S-cam brakes, air will enter the brake chambers. The added air pressure will push out the rods and move slack adjusters, twisting the brake camshafts.
See the exact questions that will be on the 2025 Texas 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 Texas | Frequently Asked Questions
To secure a CDL Bus endorsement in Texas, you must first possess a Commercial Driver's License (CDL). Next, pass the Passenger Vehicles endorsement written test. Then, get a school bus endorsement by passing the School Bus endorsement written test. Lastly, complete a driving skills test in the type of vehicle you'll be driving. This includes pre-trip inspection, basic vehicle control and on-road driving.
To obtain a CDL Bus license in Texas, you must have a valid Texas driver's license, be at least 18 years old (21 if driving interstate), and pass a medical examination. You'll also need to pass the CDL general knowledge test, the passenger transport test, and the school bus endorsement test. Finally, you must successfully complete the CDL skills test in a school bus.
Yes, specific training is required for a CDL Bus endorsement in Texas. You must pass the general knowledge test, Passenger Endorsement, and School Bus Endorsement tests. Additionally, you'll need to pass a driving skills test in a vehicle similar to the bus you plan to drive. Some applicants find it helpful to take professional driving courses before testing.
CDL Bus licenses in Texas fall under Class B or Class C. Class B is for vehicles designed to carry 24 passengers or more, including the driver. This includes school and city buses. Class C is for smaller vehicles designed to carry 16 to 23 passengers, including the driver. Both require the Passenger (P) endorsement, and school buses additionally require the School Bus (S) endorsement.
No, you cannot use your personal vehicle for the CDL Bus driving test in Texas. The vehicle you use must match the class of CDL you are applying for. Therefore, if you're applying for a CDL Bus license, you'll need to test in a bus that fits the classification of the license you're seeking.
The CDL Bus driving test in Texas evaluates skills such as pre-trip vehicle inspection, basic vehicle control, and on-road driving. You'll be assessed on maneuvers like stopping, turning, merging into traffic, and navigating intersections. Also, proper use of mirrors, signaling, speed control, and responding appropriately to road signs and traffic signals will be evaluated.
Yes, additional medical prerequisites are required for a CDL Bus endorsement in Texas. Applicants must pass a Department of Transportation (DOT) physical examination every 24 months. This includes vision and hearing tests, a blood pressure check, and checks for other physical conditions that could affect driving ability.
No, it is not permissible to transport passengers without a valid CDL Bus endorsement in Texas. This endorsement is required for drivers who wish to drive a bus or vehicle designed to transport 16 or more passengers, including the driver. Operating such a vehicle without the proper licensing can lead to significant fines and penalties.
In Texas, you can add a CDL Bus endorsement to your existing license. You don't need to apply for a new license. However, you'll need to pass the Passenger Vehicles written test and a skills test in the vehicle type that matches the class and type of vehicle you'll be driving.
Yes, there are certain restrictions for drivers with a CDL Bus endorsement in Texas. For example, a driver with a CDL Bus endorsement cannot drive a bus under the influence of alcohol or drugs, or commit traffic violations. Also, they are subject to random drug and alcohol testing as part of the Federal Motor Carrier Safety Administration regulations.
