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Explosives, Accessories and Blasting Practice – 1

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Explosives, Accessories and Blasting Practice

Explosives, Accessories and Blasting Practice

Explosives, Accessories and Blasting Practice - 1

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1. The burning speed of the safety fuse is?

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

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

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4. Detonating fuse consists core of..?

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

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

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7. The VOD of ANFO is?

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8. With permitted explosive the duration of flame is?

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9. The VOD of Nonel is.......?

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

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

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

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13. The VOD of OCG is?

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

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15. The reducing agent in slurry explosive is?

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16. Sheathed explosive coated with a sheath of?

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

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18. The VOD of premix is?

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19. The sensitizer in Emulsion explosive is?

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

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

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

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23. The VOD of Emulsion explosive is?

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24. The VOD of slurry explosive is?

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

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26. In the detonator the priming charge is?

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

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

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29. Safety fuse consists core of..?

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

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

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