The instruments helpful for proper control of mine ventilation, ones environmental conditions for human work are
A. thermometers
B. barometers
C. hygrometers
D. velometers
E. all these
Answer: Option E
This Question Belongs to Mining Engineering >> Mine Ventilation
Related Questions on Mine Ventilation
The mechanical mixture of gases existing in a mine given off after explosion called
A. White damp
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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