Q234
What should be the minimum pressure to be maintained at the nozzle in hydraulic mining operation?
A.
5 - 10 kgf/cm2
B.
10 - 20 kgf/cm2
C.
21 - 35 kgf/cm2
D.
40 - 100 kgf/cm2
AnswerAnswer: Option D
Solution
Answer: Option D
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