Q101
Open questionIn electric cap lamps, lead peroxide is used as . . . . . . . .
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Mining Engineering · all questionsMiscellaneous in Mining
Miscellaneous in Mining
practice.
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184
Questions
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Q102
Open questionLuminous efficiency is expressed in . . . . . . . .
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Q103
Open questionThe lumen output of fluorescent discharge tube being as much as . . . . . . . . times that of the incandescent filament bulb.
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Q104
Open questionThe lowest temperature at which a fine dry coal dust cloud can be ignited is
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Q105
Open questionIn which flame safety lamp automatic flame extinguisher is provided.
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Q106
Open questionThe weight of Britelite Audio visual alarm lamp . . . . . . . . kg.
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Q107
Open questionDischarge lamps contains . . . . . . . . vapour.
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Q108
Open questionSingle alkaline cell gives an emf of . . . . . . . . volts.
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Q109
Open questionThe type of flame safety lamps permitted by DGMS for testing gas in all degree of gassiness.
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Q110
Open questionIt is the relative amount of luminous energy given by any source called . . . . . . . .
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Q111
Open questionThe flame safety lamp commonly used for accumulation test made under velox trade names . . . . . . . .
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Q112
Open questionOutput of light lumens and the life of the bulb in hours of old ham cap lamp respectively is . . . . . . . .
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Q113
Open questionThe minimum amount of light required for reading . . . . . . . .
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Q114
Open questionWet kata cooling power of at least the following value indicates a comfortable thermal environment . . . . . . . .
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Q115
Open questionThe weight of GL-50 lamp with fuel is . . . . . . . . kg.
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Q116
Open questionAt 3 m distance the illumination would be . . . . . . . .
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Q117
Open questionWhy we not use the copper gauze in a flame safety lamp.
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Q118
Open questionThread like blood sucking worm which enters the body through the . . . . . . . .
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Q119
Open questionDust particles in the inhaled air is from the hair and mucus in nose arrest the size of the particles greater than . . . . . . . . in diameter.
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Q120
Open questionTo improve the lighting effect the following places to be white washed in u/g mines.
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