2024 AK CDL Practice Test: Class B - Test 4 Based on 2024 AK CDL Handbook 3. The air compressor is connected to the engine through ______. A Gears. B A V-disc. C A very short tube. D None of the listed answers. Next More 3/29 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 AK 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