2024 NC CDL Practice Test: Class B - Test 3 Based on 2024 NC CDL Handbook 16. Most heavy trucks with manual transmissions require ____ to change gears. A Single clutching B Double clutching C Triple clutching Next More 16/29 Progress 0 Errors Restart Next Next Class B - Test 3 Back to Test List Class B - Test 2 Class B - Test 4 Challenge Library 12 More NC CDL Practice Tests 12 Class B - Test 4 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