Drilling And Blasting - Study Mode
[#621] Specifications of stone dust should be tested once in . . . . . . . . months.
Correct Answer
(D) 4
[#622] Wind rose is used to show
Correct Answer
(D) Air flow direction
[#623] Maximum velocities of ventilating air at other roadways.
Correct Answer
(C) 6 m/sec
[#624] The main mine fan has to run for all . . . . . . . . days.
Correct Answer
(B) 365
[#625] Deck loading is very useful when
Correct Answer
(C) strata consists of alternate band of hard and softer rocks