To drive a commercial vehicle with air brakes, you must pass the Texas DPS Air Brakes knowledge test — or your CDL will carry a restriction prohibiting you from operating air-brake-equipped vehicles. This practice test has 25 questions covering all core air brake topics.
This is a study tool, not the official Texas DPS exam. Questions are designed to help you learn the material thoroughly.
- ✓ Air compressor, air dryer, tanks, and valves
- ✓ Normal operating pressure range and warning thresholds
- ✓ Pre-trip air brake inspection procedures
- ✓ Spring brakes, parking brakes, and emergency systems
- ✓ Brake lag, brake fade, and stopping distance
- ✓ Controlled braking and stab braking techniques
- ✓ Dual air brake systems and circuit operation
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