The wet bulb temperature of air at a particular place in a mine is 31°C, then the velocity of air in that place should be
A. More than 1 m/s
B. Less than 1 m/s
C. More than 2 m/s
D. Less than 2 m/s
Answer: Option A
This Question Belongs to Mining Engineering >> Mine Ventilation
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The mechanical mixture of gases existing in a mine given off after explosion called
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B. Stink damp
C. Black damp
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A Drager Gas Mask does not filter
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