51. The extraction or reduction of pillars shall be conducted in such away that as to prevent as far as possible the exention of a collapse or subsidence of the roof over pillars have been . . . . . . . . extracted.
52. In which section of Mines Act 1952 the provision on occupational health survey is mentioned?
53. After firing shot electrically no person shall re-enter the face until . . . . . . . . min.
54. The initial medical examination of every person employed in the mine should be arranged within a period of 'A' years of the date so notified by the manager. A is given by
55. If the depth of seam exceeding 240 meters but not exceeding 360 m, the width of the galleries does not exceed 4.8 m, the distance between centres of adjacent pillar shall not be less than . . . . . . . .
56. The thickness of air stopping not less than . . . . . . . . centimeters.
57. Gloves, goggles, skin wards, respirator or such other protective equipment shall be supplied . . . . . . . . to the respective workers working on their respective work.
58. In spot sampling collection of dust is made for every . . . . . . . . of length sampled.
59. What is the name of the place where the explosives are stored for the purpose of issuing it to an authorized person?
60. How many rescue trained persons should be there in a rescue station to maintain a rescue brigade?
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