Air Brakes #1
Air Brakes Endorsement Test | Virginia 2026 #1 Page 4 of 4
Train for FREE online with our Virginia 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 VA Class A/Class B driver license in 2026, 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 . If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:
If your vehicle has air brakes, the air compressor drive belt should be checked before each drive. Check the tightness of the belt and verify that it is in good condition.
20 . What do the two systems of a dual air brake system share?
Both systems in a dual air brake systems share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.
21 . 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.
22 . What does the air compressor governor do?
In an air brake system, the air compressor governor controls when the air compressor pumps air into the storage tanks. It stops pumping if the pressure in the tanks becomes too high, and begins pumping if the pressure becomes too low.
23 . When leaving your vehicle unattended:
In general, you should always use the parking brake when parking your vehicle. However, you should not apply the parking brake if your brakes are very hot or if your brakes are wet and temperatures are below freezing.
24 . If the air pressure in an air brake system becomes too low, it may:
If the pressure in an air brake system becomes too low, the brakes will no longer work. If the low pressure warning signal activates, you should leave the road and stop safely while you still have braking power.
25 . When you are about to start down a hill, you should switch into a ____ gear.
Before starting down a hill, be sure to switch into a low gear. Gravity will increase your vehicle's speed as you travel downhill.
2026 Virginia | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in Virginia, first, you must hold a valid Commercial Driver's License (CDL). Next, pass a written Hazmat knowledge test at a DMV customer service center. After passing the test, you'll need to complete a federal security threat assessment application and fingerprinting through the Transportation Security Administration (TSA).
To obtain a CDL Hazmat license, you must first have a valid Commercial Driver's License (CDL). You must also be at least 21 years old, a U.S. citizen or have legal status in the U.S. Additionally, you need to pass a Hazardous Materials Endorsement Knowledge Test and complete a federal security threat assessment, which includes fingerprinting and a background check.
When applying for a CDL Hazmat endorsement, you need to provide proof of U.S. citizenship or legal status, like a birth certificate, passport, or permanent resident card. You should also have your valid Commercial Driver's License (CDL). Additionally, you’ll need to complete the Hazardous Materials Endorsement application form and a TSA security threat assessment form.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. This test is known as the Hazardous Materials Endorsement Knowledge Test. It covers topics related to the transportation of hazardous materials, including safety protocols, emergency procedures, and federal regulations. Applicants must pass this test to obtain the Hazmat endorsement.
The CDL Hazmat endorsement written test covers various topics related to hazardous materials. These include identifying different types of hazardous materials, understanding shipping papers, placarding rules, and safety procedures. The test also focuses on proper loading, unloading and containment procedures, as well as emergency response protocols in the event of a spill or accident.
Yes, there are additional charges associated with acquiring a CDL Hazmat endorsement. These include fees for the TSA background check, fingerprinting, and the application itself. The total cost can vary, but typically ranges from $80 to $120. It's important to check with your local DMV for the most current and accurate fee information.
Yes, to acquire a CDL Hazmat endorsement in Virginia, it's mandatory to undergo a federal background check and fingerprinting. This is called the TSA Hazardous Materials Endorsement Threat Assessment Program. It's designed to ensure the safety and security of transporting hazardous materials. The applicant must not have any disqualifying criminal offenses.
Yes, specialized training and certification are required for the CDL Hazmat endorsement. In Virginia, individuals must pass a written test to demonstrate their knowledge of handling hazardous materials. This is in addition to the general CDL requirements. The written test covers topics like loading and unloading hazardous materials, bulk tank loading, and emergency response procedures.
No, it's illegal to transport hazardous materials without a valid CDL Hazmat endorsement in Virginia. This endorsement is required to ensure the driver has the necessary knowledge and skills to handle hazardous materials safely. Violating this regulation can result in hefty fines, loss of CDL privileges, and potential criminal charges.
Yes, you can add the CDL Hazmat endorsement to your current CDL license. You don't need to apply for a new CDL. However, you must pass the Hazmat knowledge test and a TSA security threat assessment. Once you pass these, the endorsement will be added to your existing CDL.