Methane drainage was first fried in the colliery in Ruhr coal field of . . . . . . . . in 1943.
A. Canada
B. Germany
C. Japan
D. Australia
Answer: Option B
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
Join The Discussion