61. The determination of percentage of inflammable gas shall be made or sample of air taken at suitable point fixed by the manager on the . . . . . . . . side of first working place and as the . . . . . . . . sides of last working place in the district.
62. Which of the following qualifications is not desirable for getting selection in training in rescue work?
63. Act shall not apply to any depth of excavation measured from its highest to its lowest point nowhere exceeding 'A' meters. 'A' is given for coal
64. A coal barrier of not less than . . . . . . . . meters in thickness shall be maintained in the seams from old bore holes and present working of the mine from where exploration of methane is in progress
65. Every zone formed shall be divided into . . . . . . . . equal sections, for check on measures for dust control.
66. What should be the maximum period for remaining inside the mine for doing rescue work using breathing apparatus?
67. What is the scale of accommodation of latrine for females in mines?
68. No person shall work or travel on any ledge or foot path less than . . . . . . . . meters wide from where he is likely to fall more than . . . . . . . . unless he is protected by guard rails fence or safety belt or rope suitably fixed and sufficiently strong to prevent him from falling.
69. Pillars formed in any seam or section shall be normally be . . . . . . . . in shape.
70. Maximum number of shots that a shot firer may fire in any shift, be fixed by the . . . . . . . .
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