Mining Engineering > GATE 2019 > Mine Safety
Respirable dust in an underground coal mine contains 4.5% free silica. As per the CMR 2017, the maximum allowable respirable dust concentration, in mg/m3, in the mine air is
A
1.5
B
2.0
C
2.5
D
3.0

Correct : b

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Related Topics

respirable dust underground coal mine CMR 2017 maximum respirable dust concentration mining engineering GATE 2019 free silica dust underground coal mining GATE mining engineering respirable dust underground

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