2024 CO CDL Practice Test: Class A - Test 2 Based on 2024 CO CDL Handbook 2. When does the air compressor governor allow air to start pumping? A 75 B 100 C 50 Next More 2/29 Progress 0 Errors Restart Next Next Class A - Test 2 Back to Test List Class A - Test 1 Class A - Test 3 Challenge Library 12 More CO CDL Practice Tests 3 Class A - Test 3 4 Class A - Test 4 5 Class A - Test 5 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