Coal seams said to be contiguous, if the two seams are separated by a parting of less than.
A. 3 m
B. 6 m
C. 9 m
D. 10 m
Answer: Option C
A. 3 m
B. 6 m
C. 9 m
D. 10 m
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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