The cooling effect of the air depends not only on the
A. temperature
B. humidity
C. velocity of air
D. all of these
Answer: Option D
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
D. After damp
A Drager Gas Mask does not filter
A. Water vapour
B. Nitrous fumes
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D. Carbon dioxide
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