21. The first barrier also called
22. Methane drainage was first attempted in which mine.
23. The type of apparatus used to administer pure O2 to an unconscious person or to whome breathing is feeble called . . . . . . . .
24. ANFO is used in
25. A roadway driven along dip of seam.
26. Margin of safety usually equals to . . . . . . . . of the depths in case 1 'O' Donhue's formula for shaft pillar.
27. It is the instrument used to testing continuity of an electric circuit for blasting
28. Crawler mounted rocker shovel is best for drifting a drift maximum grident of
29. If the gas mask or self rescuer used in atmosphere containing more than 2% CO what happens.
30. Natural ventilation pressure assists the fan ventilation pressure in case of . . . . . . . .
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 7
- Drilling and Blasting - Section 9
- Drilling and Blasting - Section 10