41. Explosive are carried from magazine to underground through a
42. The diameter of the drum of any winding engine installed before 25th October 1955 shall be not less than 'a' times of the diameter of the rope. 'a' is given by
43. The space between the frame of every ventilation door and roof and sides of the roadway shall be built up with masonary or concert not less than . . . . . . . . centimeter thickness.
44. What should be the maximum limit of aggregate horsepower of all heavy earthmoving machinery used in an opencast mine, when appointment of Engineer having degree or equivalent qualification in electrical or mechanical engineering recognized by the Central Government is made mandatory by the CMR 2017?
45. In the event of emergency at underground mine Superintendent shall perform rescue & recovery work & within 'A' days shall send a report to the RI or CI of mines. 'A' is given by
46. The owner, agent or manager shall submit the annual return on or before . . . . . . . . day if February in every year in respect of the preceding year in the form and method specific by the CI for the purpose
47. While using rescue apparatus, the leader shall carry a watch to record the pressure of compressed oxygen at an interval of 'A' minutes. A is given by
48. In first or second or third degree gassy mines, the velocity of air at immediate out bye ventilation connection from the face to be . . . . . . . . m/min.
49. A thickness of the lid not less than . . . . . . . . centimeters.
50. Every working place/face, the floor and sides of roadway within . . . . . . . . meters than of shall be, unless naturally wet throughout, regularly washed down to prevent accumulation of dust.
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