In a mine big roof fall taken place in main in take air way, fan drift water gauge.
A. Will decrease
B. Increase temporarly
C. Remain uneffected
D. Will register an increase
Answer: Option D
A. Will decrease
B. Increase temporarly
C. Remain uneffected
D. Will register an increase
Answer: Option D
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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