Each drill consumes nearly . . . . . . . . of free air per minute work at time in 6 m diameter shaft
A. 1 m3
B. 2 m3
C. 3 m3
D. 6 m3
Answer: Option C
A. 1 m3
B. 2 m3
C. 3 m3
D. 6 m3
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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