2024 WV CDL Practice Test: Tank and Hazmat - Test Based on 2024 WV CDL Handbook 19. Dividers inside tankers that have openings at the top and bottom are called _________. A Barriers. B Bulkheads. C Baffles. D Dufflers. Next More 19/30 Progress 0 Errors Restart Next Next Tank and Hazmat - Test Back to Test List All - Test 3 Tank and Hazmat - Test 2 Challenge Library 12 More WV CDL Practice Tests 1 Class A - Test 1 39 Tank and Hazmat - Test 2 40 Class C - Test 41 Class C - Test 2 42 Class C - Test 3 43 Class C - Test 4 44 Class C - Test 5 45 Bus - Test 46 Bus - Test 2 47 Bus - Test 3