Drilling And Blasting - Study Mode
[#581] Preparatory stoppings also called as . . . . . . . .
Correct Answer
(B) Isolation stoppings
[#582] CO produced by O 2 absorbed the ratio is called . . . . . . . .
Correct Answer
(A) Grahams ratio
[#583] The weight of chemical oxygen breathing apparatus SAR-30.
Correct Answer
(B) 4.7 kg
[#584] Ascensional and homotropal ventilationis normally adopted to ventilate in inclined longwall face is
Correct Answer
(D) Correct
[#585] In this process, holes can be drilled from surface or underground working at any angle to the horizontal and used mainly for coring. The drilling process is called
Correct Answer
(C) diamond drilling