Explosives, Accessories and Blasting Practice – 1

1. The reducing agent in slurry explosive is?

2. Sheathed explosive coated with a sheath of?

3. The hole should terminate ....m below if immediate roof is shale?

4. The tool that is used for cleaning and detection of crack in a shot hole is?

5. The sensitizer in Emulsion explosive is?

6. The burning speed of the safety fuse is?

7. The length of shot firing cable in OCP should not be less than..?

8. The gelling agent in slurry explosive is..?

9. A chemical component having 3 properties-High explosive and Oxidising agent and cooling agent is?

10. The VOD of Nonel is.......?

11. With permitted explosive the duration of flame is?

12. In ANFO the water content should not be more than?

13. The pattern of cut mostly preferred in tunnels and drifts of small area is?

14. In the detonator the priming charge is?

15. Detonating fuse consists core of..?

16. The VOD of ANFO is?

17. The VOD of premix is?

18. The VOD of slurry explosive is?

19. Magazine should be away from all buildings at least.........m?

20. An instrument to test the continuity of an electric circuit for firing system is?

21. The VOD of Detonating fuse is...?

22. The detonator used in electrical storms where static electricity is there?

23. The VOD of Emulsion explosive is?

24. Safety fuse consists core of..?

25. The constituents in slurry explosive (TNT:AN)?

26. At least how much % the packed explosives are less effective than bulk explosives?

27. The depth of hole is restricted to 50%-60% of the width of the drift in..?

28. The VOD of OCG is?

29. The amount of diesel oil mixed for 100kg of AN is (dry season and wet season)?

30. What excess % of diesel oil will lower the sensitivity?

31. In ANFO explosive the % of diesel oil is mixed for effective oxygen balanced explosive mixture is?