2024 UT CDL Practice Test: HazMat - Test Based on 2024 UT CDL Handbook 4. What is the minimum tread depth of steering axle tires? A 1/32. B 2/32. C 4/32. D 8/32. Next More 4/30 Progress 0 Errors Restart Next Next HazMat - Test Back to Test List Class B - Test 7 HazMat - Test 2 Challenge Library 12 More UT CDL Practice Tests 17 HazMat - Test 2 18 HazMat - Test 3 19 HazMat - Test 4 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