Hoolamite will be converted to a shade of green, brown or black by the reaction of . . . . . . . .
A. CO2
B. CO2N2
C. CO
D. H2S
Answer: Option C
A. CO2
B. CO2N2
C. CO
D. H2S
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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