31. Under ground gassification, development done towards A. Rise B. Dip C. Strike D. Absolute dip 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. Cable drilling employed commonly employed for holes deeper than A. 30m B. 40m C. 45m D. 50m 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
33. In drilled shafts all the sinking work can be carried out by A. Sequence controlled automatic machines B. Relay controlled machines C. Pilot controlled machines D. Robert controlled 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
34. Continuous record of bore hole deviation from top to bottom by an instrument by A. Borehole camera B. Sonic instrument C. Compass D. Tropari instrument 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
35. While driving slices, what should be the minimum thickness of rib of coal to be left against adjacent goaf. A. 1.8m B. 1.5m C. 1.2m D. 0.8m 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
36. Pumps are employed when the make of water in the shaft exceed A. 200 L/min B. 150 L/min C. 100 L/min D. 50 L/min 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. Common rate of sand stowing in μ/g mines is A tons of sand per hour. Value of A is given by . . . . . . . . A. 100 B. 200 C. 500 D. 1000 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. The number of panels to be opened at a time decided by A. Incubation period B. Output C. Capacity of direct haulage D. Thickness 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
39. Water infusion of coal face in ploughing causes. A. Gas generation B. Dust generation C. Effective breaking D. Suppression of dirt 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. With AFC the length of single unit face commonly A. 80 B. 100 C. 160 D. 200 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