2024 WY CDL Practice Test: Class A - Test 5 Based on 2024 WY CDL Handbook 17. How does excessive heat affect service brakes? A Chemical changes in the brake lining. B To fade. C To fail. D All of the listed answers. Next More 17/30 Progress 0 Errors Restart Next Next Class A - Test 5 Back to Test List Class A - Test 4 Class A - Test 6 Challenge Library 12 More WY CDL Practice Tests 6 Class A - Test 6 7 Class A - Test 7 8 Class A - Test 8 9 Class B - Test 10 Class B - Test 2 11 Class B - Test 3 12 Class B - Test 4 13 Class B - Test 5 14 Class B - Test 6 15 Class B - Test 7