2024 NM CDL Practice Test: HazMat - Test Based on 2024 NM CDL Handbook 30. What is the minimum size of a placard? A 10 ¾ inches B 7 ½ inches C 4 inches Grade More 30/30 Progress 0 Errors Restart Grade Grade HazMat - Test Back to Test List Class B - Test 7 HazMat - Test 2 Challenge Library 12 More NM 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