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71
The maximum voltage of electrical signals in underground mines having supported on insulators is
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Answer: Option A
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72
The inflammable material shall not be stored within a distance of . . . . . . . . meters from any entrance to a mine which is not effectively sealed off from the working below ground.
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Answer: Option B
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73
No working shall be made and no work of extraction or reduction of pillars shall be conducted at or extend to, any point within . . . . . . . . meters in any railway or any public works in respect with the regulations.
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Answer: Option B
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74
In every coal seam arrangements shall be made once in at least every . . . . . . . . days to ascertain the atmospheric condition behind the stoppings built to seal of the area of workings, unless such stopings are capable of resisting force of an explosion.
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Answer: Option D
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75
In every below ground working . . . . . . . . different sources of power to the mechanical ventilator shall be provided.
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Answer: Option D
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76
Which of the following functions of rescue station is not permitted by Chief Inspector even though the owner is allowed to establish a rescue room for group of mines having total number of persons ordinarily employed is in excess of 5000?
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Answer: Option A
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77
What should be the degree of fleet angle?
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Answer: Option A
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78
Every airway, air crossing, stopping, doors shall be examined by a competent person once atleast in every . . . . . . . . days.
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Answer: Option C
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79
The strips at uniform interval not exceeding . . . . . . . . meters of sampling.
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Answer: Option B
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80
Every magazine where explosive are stored shall be in charge of . . . . . . . . person for proper receipt, storage and issue of exploses.
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Answer: Option B
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