71. When the barometric pressure decreases, the methane emmission in under ground work is . . . . . . . .
72. Optimum rate of stone dusting in under ground coal mines is . . . . . . . .
73. The vertical depth of a place in the mine from surface.
74. Intake air to a L/W panel has CO at 10 ppm and O2 at 20.5, where as return air has CO at 30 ppm and O2 at 20%. The Grahams ratio % for the oxidation process in pannel is . . . . . . . .
75. The deposit in shallow depth is approached by
76. Which law explains fluid flow
77. The isolation stopings should be well locked to roof, floor, sides, the minimum depth of locking should be in sand stone roof.
78. The percentage of sulphur present in gun powder.
79. Strength of booster is
80. The main purpose of emergency stoping is . . . . . . . . the area immediately, prevent access of air into fire area.
Read More Section(Drilling and Blasting)
Each Section contains maximum 100 MCQs question on Drilling and Blasting. To get more questions visit other sections.
- Drilling and Blasting - Section 1
- Drilling and Blasting - Section 2
- Drilling and Blasting - Section 4
- Drilling and Blasting - Section 5
- Drilling and Blasting - Section 6
- Drilling and Blasting - Section 7
- Drilling and Blasting - Section 8
- Drilling and Blasting - Section 9
- Drilling and Blasting - Section 10