51. Capacity of face pump develops head of
52. The percentage of extraction of the depth of seam is 300 m and gallery width 4.2 m
53. The thickest coal seam in found in . . . . . . . .
54. It is estimated that in coal mine nearly . . . . . . . . te of air to a sent down in a mine for every te of coal raise.
55. A place in a mine is not considered to be adequately ventilated if the fire damp percentage exceed . . . . . . . .
56. The synchronus induction motor has an advance of improving . . . . . . . .
57. The coefficient of friction measured in Germany . . . . . . . .
58. Air velocities in diesel locomotive sheds and battery charging station should be not less than . . . . . . . . m/sec.
59. Unless the two shafts are conected by under ground tunnel, no development work inside the mine is . . . . . . . . under law.
60. Foam type extinguisher is not permitted to deal with class 'C' fires because
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