2024 AR CDL Practice Test: Tank - Test 4 Based on 2024 AR CDL Handbook 27. On any upgrade, gravity will: A Not impact your speed. B Speed your vehicle up. C Slow your vehicle down. Next More 27/28 Progress 0 Errors Restart Next Next Tank - Test 4 Back to Test List Tank - Test 3 Tank - Test 5 Challenge Library 12 More AR CDL Practice Tests 33 Tank - Test 5 34 Air Brakes - Test 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