Which type of drill bit suitable for highly sillceous rock
A. Fish tail rotory bit
B. Tricone rock roller bit
C. Percussive bit
D. Thermal bit
Answer: Option C
A. Fish tail rotory bit
B. Tricone rock roller bit
C. Percussive bit
D. Thermal bit
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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