2024 CO CDL Practice Test: Double and Triples - Test 3 Based on 2024 CO CDL Handbook 29. Rollovers happen when: A Drivers turn too slowly. B It is raining. C Drivers turn too quickly. Grade More 29/29 Progress 0 Errors Restart Grade Grade Double and Triples - Test 3 Back to Test List Double and Triples - Test 2 Double and Triples - Test 4 Challenge Library 12 More CO CDL Practice Tests 27 Double and Triples - Test 4 28 Double and Triples - Test 5 29 Tank - Test 30 Tank - Test 2 31 Tank - Test 3 32 Tank - Test 4 33 Tank - Test 5 34 Air Brakes - Test 35 All - Test 36 All - Test 2