31. The pair of holes drilled for roof stitching at internal of A. 1 - 1.3 m B. 1.4 - 1.6 m C. 1.7 - 1.9 m D. 2 - 2.1 m 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
32. If the height of gallery is 1.2 to 1.8m the diameters of the props at thick end. A. 150mm - 175mm B. 100mm, 125mm C. 175mm, 225mm D. 250mm - 300mm 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 main purpose of lid is A. To distribute the resistance of the prop B. To prevent penetration of the prop in to the roof C. To indicate load on the prop D. Helps easy withdrawl of prop E. All of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option E No explanation is given for this question Let's Discuss on Board
34. The phenomena of the rocks in immediate roof bend down wards under their own weight and tend to separate from one an other as A. Pressure arch B. Roof bending C. Bed separation D. Subsidence 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
35. Barton, choosed six parameter to describe rock mass quality 'Q' four of them connected with joint characteristics and fifth one takes into account i.e stress reduction factor, the sixth parameter is A. RMR B. FOR C. ROD D. Effective dimension 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. Transformation from wood to anthractie is accompanied by progressive elimination of A. Hydrogen B. Oxygen C. Hydrogen + Oxygen D. Hydrogen, Oxygen and Sulphur 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
37. RMR signifies A. Strength of rock [except shear] B. Joint effects C. Water condition D. All 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
38. Pressure drop will be larger at A. Junction B. Long road way C. Narrow road way D. Split 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
39. The shear forces, intensity is lowest when the coal and floor beds are A. Moderate B. Poor C. Strong D. Weak 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. Crushing strength of sand stone A. 13.5 kg/sq.mm B. 2.25 kg/sq.mm C. 2.25 kg/sq.cm D. 13.5 kg/sq.cm 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
