A mine workers inhales normal air, where as exhaled air contains 16 - 65% O2 and 3.82% CO2. The respiratory quotient of breathing for the worker is . . . . . . . .
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Mining Engineering · all questionsMiscellaneous in Mining
Miscellaneous in Mining
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The bulb of old ham lead acid battery is filled with . . . . . . . .
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When methane is burnt two gasses are formed with a blue flame. Name the gases.
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The greatest danger of pneumo coniosis in the size of dust is . . . . . . . .
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For lighting arrangements in depillaring areas in deg.2 and 3 gassy mines having fire cluster of . . . . . . . . cap lamps placed on suitable stand, inaddition to cap lamps for individual workmen.
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Normal life of lead acid batter is . . . . . . . . Years
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Booster fan generally used in . . . . . . . .
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The power can be used at voltage not exceeding . . . . . . . . V in bulbs/lights.
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During assembly the upper section is assembled with the . . . . . . . . section of flame safety lamps the combined assembly then screwed in to . . . . . . . . section and locked magnetically.
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CaCl2 and Calsolene oil are chemicals which are used to keep the dust.
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The supervisory staff in coal mines therefore required to undergo periodical eye testing once in . . . . . . . . years.
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Anthra cosis comes under inorganic dust producing group of . . . . . . . .
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The maximum air velocity at the face is . . . . . . . .
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The type of flame safety lamps is permitted by DGMS for gas testing in Deg.1 and Deg.2 gassy mines of coal.
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Sudden irush of water into active workings of the mine.
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Worst disaster caused by inundetion of mines was at chasnala colliery in Bihar in . . . . . . . .
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Find the H.P assistancedue to NVP if the w.g is 12.07 mm of wg and air passing in DC shaft is 100m3/sec.
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The thickness and height of temporary dam is . . . . . . . .
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Lumens emitted by a lamp . . . . . . . .
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In which of the following Indian mines first refrigeration plant was installed in
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