In an underground working area, CH4 and CO2 are normally expected to be found respectively
A. Near the floor and along the roadway
B. Near the floor and near the roof
C. Near the roof and near the floor
D. Along the roadway and near the floor
Answer: Option C
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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