31. When contra rotating fan reversed, the fan produces nearly . . . . . . . .% of normal air quantity.
32. Thin seam the thickness of coal less than . . . . . . . .
33. Self contained breathing apparatus is a . . . . . . . . type apparatus.
34. If the atmosphere contain full O2 the apparatus used by weaver to protect himself from poisonous atmosphere containing CO and other toxic gases in small percentages called . . . . . . . .
35. Number of cylinders in the Novex reviving apparatus.
36. The deepest shaft in coal mine in this country is at . . . . . . . .
37. Mine air is coursed to the working places by the use of . . . . . . . .
38. Permitted explosives are always
39. The quantity of coal dust amounts to rise in air as thick cloud is . . . . . . . . of space.
40. To start a fire the conditions essential are
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 6
- Drilling and Blasting - Section 7
- Drilling and Blasting - Section 8
- Drilling and Blasting - Section 9
- Drilling and Blasting - Section 10