CMR 2017 Respirable Dust Limit (4.5% Free Silica) | GATE Mining Engineering 2019 Q21

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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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