2024 OK CDL Practice Test: HazMat - Test 4 Based on 2024 OK CDL Handbook 25. You may not consumer alcohol within how many hours of going on duty? A 1 B 2 C 4 Next More 25/29 Progress 0 Errors Restart Next Next HazMat - Test 4 Back to Test List HazMat - Test 3 HazMat - Test 5 Challenge Library 12 More OK CDL Practice Tests 20 HazMat - Test 5 21 HazMat - Test 6 22 Passenger - Test 23 Passenger - Test 2 24 Double and Triples - Test 25 Double and Triples - Test 2 26 Double and Triples - Test 3 27 Double and Triples - Test 4 28 Double and Triples - Test 5 29 Tank - Test