What should be the speed of air current when the wet bulb temperature exceeds 30.5°C
A. 0.8 m/sec
B. 0.4 m/sec
C. 0.9 m/sec
D. 1 m/sec
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
C. Carbon monoxide
D. Carbon dioxide
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