Lower limit of inflammability of methane air mixture that participate in exposion
A. 3%
B. 8%
C. 5%
D. 10%
Answer: Option C
A. 3%
B. 8%
C. 5%
D. 10%
Answer: Option C
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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