41. By installing an auxiliarly fan a forcing fan is used below ground for ventilation.
42. Which explosive fired by safety fuse.
43. Level situated in between two main drives.
44. The instrument which directly indicates the air velocity in m/sec. any point of observation.
45. The plans regarding the rescue and stone dust brought upto date not less than once in . . . . . . . .
46. Air velocities arereduced in the road ways and at the faceand coal dust formation lessened due to . . . . . . . .
47. One method of informing all workers of emergency situation of the mine is to pour . . . . . . . . oil in the intake of airstream. There by the smell spreads all parts of mine and workers come out.
48. Moving front of any working place or the in bye end of gallery.
49. What is the full form of PETN?
50. Samples of atmosphere from behind the stopping should be collected at intervals, 48 hours after sealing . . . . . . . . interval.
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 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 8
- Drilling and Blasting - Section 9
- Drilling and Blasting - Section 10