Ventilator used in sinking shaft commonly with a capacity of
A. 100 m3/min
B. 200 m3/min
C. 300 m3/min
D. 400 m3/min
Answer: Option C
A. 100 m3/min
B. 200 m3/min
C. 300 m3/min
D. 400 m3/min
Answer: Option C
The required water for 1 ton of sand in hydraulic sand stowing is . . . . . . . .
A. 800 l
B. 600 l
C. 1100 l
D. 1200 l
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