The barometric pressure which increases with . . . . . . . . and decreases with . . . . . . . .
A. below sea level, height
B. height, below sea level
C. height, height
D. none
Answer: Option A
A. below sea level, height
B. height, below sea level
C. height, height
D. none
Answer: Option A
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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