2024 RI CDL Practice Test: Class B - Test 4 Based on 2024 RI CDL Handbook 16. Black ice is: A Not a hazard when driving. B Usually thick. C Usually thin. Next More 16/29 Progress 0 Errors Restart Next Next Class B - Test 4 Back to Test List Class B - Test 3 Class B - Test 5 Challenge Library 12 More RI CDL Practice Tests 13 Class B - Test 5 14 Class B - Test 6 15 Class B - Test 7 16 HazMat - Test 17 HazMat - Test 2 18 HazMat - Test 3 19 HazMat - Test 4 20 HazMat - Test 5 21 HazMat - Test 6 22 Passenger - Test