Virginia Air Brakes Test
Built for Virginia drivers who haul coal on I-81 and fight fog over Afton Mountain — this test covers what you'll actually see at the DMV.
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Virginia's Air Brakes test is 25 questions, 30 minutes, 80% to pass. Know your brake lag and how to handle a runaway on I-81 — that's what examiners look for.
Key Topics
- •Air system components and brake lag
- •Emergency braking and spring brakes
- •Pre-trip inspection requirements
About the Virginia Air Brakes Test
Topics Covered
- ✓Air brake system components — Virginia examiners want you to name parts like the compressor, governor, and air tanks, not just recognize them on a diagram.
- ✓Brake lag and stopping distance — critical on I-81's long downgrades where a second of lag can mean the difference between stopping and rolling into the back of a coal truck.
- ✓Dual air brake systems — Virginia's winter road salt and mountain moisture cause more air system leaks; you need to understand how both circuits work independently.
- + 3 more topics
📘 Study Tips & State Info
Virginia DMV examiners focus on the "why" behind air brake rules — not just memorizing numbers. They'll ask you what happens to stopping distance when you're going 40 mph vs. 20 mph on a wet road. Know the formula: speed doubles, stopping distance quadruples. That's a big deal on I-64 in a rainstorm.
Pay extra attention to the pre-trip air brake inspection section in the Virginia CDL manual. The DMV skills test requires you to do a full air brake check in front of the examiner — they watch you build pressure, listen for leaks, and test the low-pressure warning. If you can't do that cold, you won't pass the road test. Our practice test covers the same questions they ask on the written exam, so you're ready for both.
Another tip: Virginia's manual includes specific numbers — like 55 psi for the low-pressure warning, 85-100 psi for the governor cut-out. They expect you to know those. Don't just guess. Practice until the numbers stick.
Virginia DMV administers the Air Brakes written test at all full-service DMV locations that offer CDL testing. You don't need a separate appointment for the written test — just walk in during regular hours, but arrive early because CDL testing lines can be long, especially at the Richmond, Roanoke, and Northern Virginia offices. The test fee is included in your CDL permit fee (currently $50 for the permit). You'll need a valid Medical Examiner's Certificate before you take any CDL knowledge test.
Virginia follows FMCSA standards exactly for the Air Brakes endorsement. The test is 25 questions, 30 minutes, 80% to pass. If you fail, you can retake it the same day in most offices, but you'll have to wait in line again. There's no extra fee for retakes within the same permit application period.
One thing Virginia does differently: they include questions about air brake systems on school buses and single-unit trucks, not just tractor-trailers. So even if you're getting a Class B with air brakes, study the same material. The endorsement is the same test for all air-braked vehicles.
About the Virginia Air Brakes Test
If you're driving a commercial vehicle with air brakes in Virginia, you need this endorsement. It's not optional. The Virginia DMV tests you on everything from basic air system components to emergency braking procedures — and they expect you to know how it applies to real roads here.
Think about I-81 between Roanoke and Winchester. That's miles of rolling hills and steep grades, loaded with coal trucks and loggers. Air brakes aren't a luxury on that stretch — they're your only way to stop when a deer jumps out or fog drops visibility to zero in the Shenandoah Valley. Virginia examiners know this, and they write questions that reflect it.
The test covers brake lag, dual air systems, spring brakes, and what to check during a pre-trip inspection. You'll also see questions about stopping distances on wet pavement (and Virginia gets plenty of rain and snow, especially east of the Blue Ridge). You don't just need to pass — you need to understand how your brakes work when you're coming down Afton Mountain on I-64 with a full load.
Our practice test follows the same format as the real Virginia DMV exam: 25 multiple-choice questions, 30-minute time limit, 80% passing score. Each question has an explanation so you learn why the answer is right — not just memorize it.
Topics Covered
Study Tips
Virginia DMV examiners focus on the "why" behind air brake rules — not just memorizing numbers. They'll ask you what happens to stopping distance when you're going 40 mph vs. 20 mph on a wet road. Know the formula: speed doubles, stopping distance quadruples. That's a big deal on I-64 in a rainstorm.
Pay extra attention to the pre-trip air brake inspection section in the Virginia CDL manual. The DMV skills test requires you to do a full air brake check in front of the examiner — they watch you build pressure, listen for leaks, and test the low-pressure warning. If you can't do that cold, you won't pass the road test. Our practice test covers the same questions they ask on the written exam, so you're ready for both.
Another tip: Virginia's manual includes specific numbers — like 55 psi for the low-pressure warning, 85-100 psi for the governor cut-out. They expect you to know those. Don't just guess. Practice until the numbers stick.
Virginia Specific Information
Virginia DMV administers the Air Brakes written test at all full-service DMV locations that offer CDL testing. You don't need a separate appointment for the written test — just walk in during regular hours, but arrive early because CDL testing lines can be long, especially at the Richmond, Roanoke, and Northern Virginia offices. The test fee is included in your CDL permit fee (currently $50 for the permit). You'll need a valid Medical Examiner's Certificate before you take any CDL knowledge test.
Virginia follows FMCSA standards exactly for the Air Brakes endorsement. The test is 25 questions, 30 minutes, 80% to pass. If you fail, you can retake it the same day in most offices, but you'll have to wait in line again. There's no extra fee for retakes within the same permit application period.
One thing Virginia does differently: they include questions about air brake systems on school buses and single-unit trucks, not just tractor-trailers. So even if you're getting a Class B with air brakes, study the same material. The endorsement is the same test for all air-braked vehicles.