A. Dam broken
B. Neglect
C. Gallaries approched water logged old workings of aboundoned mines
D. Sudden collapse of water bearing strata
Answer: Option C
This Question Belongs to Mining Engineering >> Miscellaneous In Mining
The bulb of old ham lead acid battery is filled with . . . . . . . .
A. Nitron
B. Butron
C. Krypton
D. None
When methane is burnt two gasses are formed with a blue flame. Name the gases.
A. CO2 + CO
B. CO2 + H2O
C. CO2 + N2
D. CO2 + CH4
The greatest danger of pneumo coniosis in the size of dust is . . . . . . . .
A. 3 micron
B. 5 micron
C. 4 micron
D. 1 micron
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