Q161
Open questionThe voltage of electric cap lamp is . . . . . . . .
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Mining Engineering · all questionsMiscellaneous in Mining
Miscellaneous in Mining
practice.
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184
Questions
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Q162
Open questionCopper is better conductor of heat than . . . . . . . .
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Q163
Open questionSpontanious heating of coal is mainly found in . . . . . . . .
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Q164
Open questionThe weight of the Acetylene portable hand lamp is . . . . . . . . kg.
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Q165
Open questionThe stone dust barrier will fail if it is located within minimum m from face . . . . . . . .
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Q166
Open questionThe surface which is good reflector of light . . . . . . . .
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Q167
Open questionThe thickness of glass cylinder used in flame safety lamp shall be . . . . . . . . thick.
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Q168
Open questionIt is the average candle of power of lamp in all directions in horizontal plane passing through the centre of source, obtained by rotating lamp in vertical axis.
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Q169
Open questionThe unit of light (luminous flux) emitted by a light source.
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Q170
Open questionIn a factory in every part where persons are working minimum illumination should be of . . . . . . . . lux.
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Q171
Open questionThe washers used in flame safety lamp made of . . . . . . . .
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Q172
Open questionDrying agent in self rescuer is . . . . . . . .
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Q173
Open questionNumber of dry cells provided in GL-60 flame safety lamp.
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Q174
Open questionThe inorganic dust producting the diseases are classified into . . . . . . . . groups.
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Q175
Open questionIt is the average candle of power of lamp in all directions.
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Q176
Open questionNumber of cylindrical glasses in GL-60 flame safety lamp.
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Q177
Open questionFind the formule for HP assistance due to NVP.
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Q178
Open questionThe persons worst subjected dust hezard in coal mines are . . . . . . . . .
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Q179
Open questionThe wire gauze shall have the total heat radiation area of not less than . . . . . . . . cm2.
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Q180
Open questionKonimeter measures the dust concentrtion in terms of . . . . . . . .
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