A toxic gas flows into a mine working place at the rate of 2.52 m3/min. The concentration of the gas in the intake air is 0.25%. The minimum quantity of intake air in m3/min required to dilute the gas to its threshold limit value of 1.0% is
A. 123
B. 252
C. 295
D. 336
Answer: Option D
This Question Belongs to Mining Engineering >> Mine Ventilation
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