31. The first or lowest slice often referred as . . . . . . . . A. Back stope B. Breast stope C. Lead stope D. None Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
32. Costliest stoping method is . . . . . . . . A. Cut and fill B. Square set C. Sub level D. Block caving Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
33. The most precise and fast collection of samples, the method is . . . . . . . . in u/g. A. Channel B. Chip C. Drill D. Wagon Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
34. In this mining method, in which masses, panels or block of ore are under cut to induce caving, permitting the broken ore to be drawn off below. A. Sub level B. Block caving C. Integral caving D. Top slicing Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
35. The foot wall shaft cross cuts are drawn to intersect the ore body and raises are made to connect the cross cuts; in under ground. The top of the raises are widened, the method of extraction is . . . . . . . . A. Open under hand stopin B. Open over hand stoping C. u/g glory hole D. Breast stoping Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
36. The deposit of iron ore in India is about . . . . . . . . % of the world. A. 5 B. 10 C. 15 D. 20 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
37. Excess pore pressure in backfill material is a cut and fill stope leads to . . . . . . . . A. Loss of shear resistance to fill B. Reductionin strength of the wall rock C. Enhance bearing strength to fill D. Prevents of progressive failure of crown pillar Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
38. Ore grade from which revenue from the recoverable reserves exactly equals to the cost of mining, treatment and marketing is called . . . . . . . . A. Cut off grade B. Average grade C. Break even grade D. None Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
39. Raise driving by use of jora hoist to drive mechanised raising upto . . . . . . . . m long raises. A. 50 B. 70 C. 80 D. 100 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
40. The ring drilling and blasting employed in this stoping. A. Breast B. VCR C. Conventional sublevel D. Cut and fill Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
