2024 NC CDL Practice Test: Class B - Test 5 Based on 2024 NC CDL Handbook 15. What do ABS brakes do? A Locks up the wheels B Help you avoid wheel lock up C Prevents the vehicle from accelerating when going uphill Next More 15/29 Progress 0 Errors Restart Next Next Class B - Test 5 Back to Test List Class B - Test 4 Class B - Test 6 Challenge Library 12 More NC CDL Practice Tests 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 23 Passenger - Test 2