31. How many Co-tubes to be kept at the surface of the mine where no rescue room is located close to the mine entrance?
32. The conventional for preparing plans and sections with regard to underground coal barrier the colour shown in plans
33. Who shall inform the Manager for any unusual change in the barometric pressure?
34. Every prop shall be set on . . . . . . . . foundation and kept tight against the roof.
35. As per CMR 2017, what should be the minimum average monthly output of an underground mine, where the Safety Officer must have First Class Manager's certificate?
36. Which of the following materials are used to hold tubs on a gradient?
37. It is expected that all timber supports of mines are to be withdrawn by
38. What should be the distance upto which the guides shall be kept extended towards the bottom of the sinking shaft exceeding 150 m in depth?
39. As per provision of CMR 2017, who shall be held responsible for determining the VEQ?
40. The exhaust air, below ground, which contains dust in excess of the permissible limit shall be efficiently diluted and if necessary filtered. So as to reduce the concentration of respirable dust there in below . . . . . . . . percent of the permissible limit before being recirculated into working place.
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