Examveda Usual length of drill rods A. 1 mB. 2 mC. 3 mD. 4 mAnswer: Option C This Question Belongs to Mining Engineering >> Coal Mining
The required water for 1 ton of sand in hydraulic sand stowing is . . . . . . . . A. 800 lB. 600 lC. 1100 lD. 1200 l View Answer
The purpose of pilot hole in stable pit drivage A. BlastingB. SupportingC. MuckingD. Ventilation View Answer
Scaffold not required in . . . . . . . . tubbing A. Over hung tubbyB. Under hungC. BrickD. Concrete View Answer
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