27. In addition to coal dust, another more toxic dust found in coal mines is _____. quartz [silica]* rock dust along belts wood dust from sawing timbers none of the above 28. CWP is an acronym for _____. cold workers pneumonia certified worker position coal weighted production coal workers' pneumoconiosis* 29. Particles capable of reaching the air sacs in the lungs are generally less than _____ microns in diameter. 3 5 7 10* 30. The most effective means of controlling respirable coal mine dust are water application and _____. good ventilation* dry roadways good lighting good eye protection 31. The battery "surface charge" generally dissipates within _____ minutes after the pump is turned on. 15* 30 45 60 32. Modifications to the sampling head assembly are permitted _____. upon approval of the District Manager at no time* by Zefon International by the state mine inspector
27. In addition to coal dust, another more toxic dust found in coal mines is _____. quartz [silica]* rock dust along belts wood dust from sawing timbers none of the above 28. CWP is an acronym for _____. cold workers pneumonia certified worker position coal weighted production coal workers' pneumoconiosis* 29. Particles capable of reaching the air sacs in the lungs are generally less than _____ microns in diameter. 3 5 7 10* 30. The most effective means of controlling respirable coal mine dust are water application and _____. good ventilation* dry roadways good lighting good eye protection 31. The battery "surface charge" generally dissipates within _____ minutes after the pump is turned on. 15* 30 45 60 32. Modifications to the sampling head assembly are permitted _____. upon approval of the District Manager at no time* by Zefon International by the state mine inspector
aaDust_Test_with_Answers.docx