11. If the guide ropes are clammped in shaft to the girders in under ground decking level shaft may extend only . . . . . . . . m below the girder level.
12. If the black damp exceeds about . . . . . . . .% the atmosphere became non explosive irrespective of any percentage of firedamp.
13. The maximum number of detonators issued to have in the possession of Shot-firer during a shift shall never exceed the
14. The instrument used for counting and size of suspended cloud of aerosois.
15. There is no pressure drop between intake to return after installation of booster fan called . . . . . . . .
16. Stone dust barrier may fail of located within . . . . . . . .m of face or other potential source of ignition.
17. Horizontal roadway parallel to strike of vein located either on footwall or hanging wall side.
18. Person are not permitted to travel on.
19. For measuring the area of roadway of irregular shape, a suitable device used called . . . . . . . .
20. To prevent coal dust raising loading skips be arranged in the
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