2024 TX CDL Practice Test: Air Brakes - Test Based on 2024 TX CDL Handbook 25. If the spring brakes are on, you should: A Press the accelerator. B Not use the brake pedal. C Move the steering wheel. Grade More 25/25 Progress 0 Errors Restart Grade Grade Air Brakes - Test Back to Test List Tank - Test 5 All - Test Challenge Library 12 More TX CDL Practice Tests 35 All - Test 36 All - Test 2 37 All - Test 3 38 Tank and Hazmat - Test 39 Tank and Hazmat - Test 2 40 Class C - Test 41 Class C - Test 2 42 Class C - Test 3 43 Class C - Test 4 44 Class C - Test 5