Air Brakes #2
Air Brakes Endorsement Test | Washington 2025 #2 Page 3 of 4
Train for FREE online with our Washington 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 WA 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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13 . A safety valve is set to open at ____ pounds per square inch (psi).
The safety valve protects air tanks and the rest of an air brake system from accumulating too much air pressure. The safety valve is usually set to open at 150 psi.
14 . If air pressure drops to a level between ____, a visual low pressure warning signal should have already activated.
A visual low pressure warning signal should activate before air pressure drops to a level between 55 and 75 psi. This signal could be a light, a buzzer, or a wig wag.
15 . Brakes can get out of adjustment quickly, especially:
Brakes are particularly prone to getting out of adjustment if they are hot. Be sure to routinely check the adjustment of your brakes. For a vehicle to be safely controlled, all brakes must be properly functioning and adjusted.
16 . ____ make up the emergency brake system.
In an air brake system, there are three different braking systems: a service brake system, a parking brake system, and an emergency brake system. The emergency brake system uses parts of both the parking and service brake systems.
17 . A wig wag is:
Vehicles with air brakes are required to be equipped with a low pressure warning device. A wig wag is a type of low air pressure warning device. This device drops a mechanical arm into the driver's view if the pressure in the tanks drops to a level between 55 and 75 psi.
18 . Why do large vehicles use air brakes?
If used and maintained properly, air brakes are a safe and effective way to stop large, heavy vehicles.
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2025 Washington | Frequently Asked Questions
To secure a CDL Bus endorsement in Washington, you must first hold a valid CDL. Then, pass the passenger vehicles test and the school bus endorsement test. Also, complete a federal background check and submit a medical examiner's certificate. Lastly, successfully complete a driving skills test in the type of bus you wish to drive.
To obtain a CDL Bus license, you need to have a valid driver's license, pass a physical examination, and complete a CDL training course. Afterwards, you'll need to pass the written knowledge test and the practical skills test. It's also necessary to pass additional tests for any endorsements, such as passenger or school bus operations.
Yes, specific training is necessary for a CDL Bus endorsement. You must pass the Passenger Endorsement and School Bus Endorsement knowledge tests. Additionally, you need to take a driving skills test in the type of vehicle you plan to drive. Training courses are available and often recommended to prepare for these tests and gain practical skills.
CDL Bus licenses fall under three classifications: Class A, B, and C. Class A is for any combination of vehicles with a combined GVWR of 26,001 or more pounds. Class B is for single vehicles weighing 26,001 or more pounds, or any vehicle towing another not over 10,000 pounds. Class C is for vehicles designed to transport 16 or more passengers (including the driver), or hazardous material vehicles.
No, you cannot use your personal vehicle for the CDL Bus driving test. The test must be taken in the same type of vehicle for which you are trying to get a license. Therefore, you need to use a commercial bus for the CDL Bus driving test. This ensures that you can handle and operate a bus safely and effectively.
During the CDL Bus driving test, examiners evaluate your ability to perform pre-trip inspections, basic vehicle control, and on-road driving. This includes skills like backing up, parallel parking, docking in a bay, and making proper turns. They also assess your understanding of traffic rules, ability to handle emergency situations, and how you interact with passengers.
Yes, there are additional medical and physical prerequisites for a CDL Bus endorsement. You need to pass a Department of Transportation (DOT) physical examination every 24 months. The examination evaluates your vision, hearing, blood pressure, and checks for conditions like diabetes or epilepsy that might impair your driving ability.
No, it is not permissible to transport passengers without a valid CDL Bus endorsement. Driving a commercial bus without the appropriate CDL endorsement is illegal and can result in fines, license suspension, or even imprisonment. It's important to have the correct endorsements to ensure safety and compliance with transportation laws.
Yes, the CDL Bus endorsement can be added to your existing CDL. You don't need to apply for a new license, but you will need to pass the Passenger Vehicles written test and the skills test in the type of vehicle you plan to drive. The endorsement is then added to your CDL.
Yes, there are restrictions for drivers with a CDL Bus endorsement. Drivers must not have any serious traffic violations, they must pass a background check, and meet physical and medical standards. Additionally, they are subjected to random drug and alcohol testing. Drivers are also limited to the type and number of passengers their specific endorsement allows.
