41. The free respirable silica present is less than . . . . . . . . percents.
42. How many days in a week, the Manager of a below ground coal mine shall visit the mine to see that the safety aspect is ensured?
43. The strips being as near as possible of equal width not less than . . . . . . . . centimeter.
44. What is the minimum floorspace required for a first aid room in a mine?
45. How many days in a week the Workmen's Inspector is expected to perform the duties as mentioned in rule 29 R?
46. Width of the gallery at any place in the mine should not exceed . . . . . . . . meters.
47. The competent person appointed for maintenance and examination of safety lamps shall be a holder of . . . . . . . . certificate.
48. Who shall be held responsible to comply with the provision of regulation 204 of CMR 2017?
49. The lid used over a prop shall have a width not less than the . . . . . . . . of the prop.
50. What should be the minimum average output of an underground mine, where the manager must have First Class Managership certificate of competency?
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