The voltage range of D6 methanometer . . . . . . . .
A. 1.2 - 2.2
B. 4 - 5
C. 2.2 - 2.8
D. 3.2 - 3.8
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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