81. In case of opencast working as per CMR 2017 where any permanent building or structures not belonging to the owner lies within the danger zone, the aggregate maximum charge per round at one time shall not exceed
82. The total pressure developed by a fan is equal to
83. Each seam should have at least . . . . . . . . out lets to surface.
84. Air velocities at the working face should be between . . . . . . . .
85. The portable apparatus which provides the current necessary for firing electric detonators is called
86. By using spot coolers in mines, they supply cool air at working faces, they have disadvantage of leaving the rest of the mine . . . . . . . .
87. The main element in fuse head of detonator is
88. Vistaram mask and speaking diaphragm fitted in the self contained breathing apparatus of mark . . . . . . . .
89. The case or container containing explosives shall be left or kept in a place of a mine which is legibly marked as
90. A level roadway which leads from shaft passes through country rock, to cut across the lode at an angle to strike.
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 3
- Drilling and Blasting - Section 4
- Drilling and Blasting - Section 5
- Drilling and Blasting - Section 6
- Drilling and Blasting - Section 8
- Drilling and Blasting - Section 9
- Drilling and Blasting - Section 10