Scheduled Mines Blasting Certificate Exam Practice Questions - Scheduled Mines Blasting Certificate Of Competency Examination (South Africa) Exam

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When pneumatic loading of loose bulk ANFO into underground blast holes in hard rock stopes, what safety precaution is essential regarding electrostatic discharge?

Use a conductive anti-static loading hose specifically grounded to the rock mass Moisten the ANFO with water prior to pouring into the hopper Use standard PVC plastic tubing to insulate the operator from ground Charge the blast holes using aluminum detonator shells only

Correct Answer:

Use a conductive anti-static loading hose specifically grounded to the rock mass

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