51. The constant feed rate of BG 174 apparatus is . . . . . . . . It/min. A. 2 B. 1.8 C. 1.5 D. 1.2 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
52. The weight of spiral - 2C apparatus. A. 2.3 kg B. 3.3 kg C. 4.5 kg D. 3.8 kg 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
53. Ventilation survey means A. Quality survey B. Quantity survey C. Both A and B D. Pressure survey 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
54. Class 8 group explosives are A. GN B. NG C. LOE D. OCG 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
55. A rescue station is under the control of . . . . . . . . A. Brigades B. Manager C. Superntendent D. Owner 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
56. Cactus grab is employed in . . . . . . . . A. Shaft sinking B. Tunnelling C. Bord and pillar mining D. Longwall mining 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
57. Every shot-firing apparatus needs to be tested at what minimum intervals as stated in CMR 2017? A. Once in every month B. Once in every 3 months C. Once in every 6 months D. Once in every 12 months 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
58. Conditions for deep hole blasting shall be specified in a general order by whom? A. DMS B. CI C. CM D. SO 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
59. In a sealed off fire area as the O2 of the trapped mine air consumed its pressure becomes less than the atmospheric air of the mine and fresh air leaks in to fire area, called. A. Sneezing B. Breathing C. Hissing D. Outburst 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
60. Silica gel in gas mask removes . . . . . . . . A. Ammonia and water vapour B. CO C. Smoke D. CaCl2 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
