91. Flame safety lamp with less than . . . . . . . . candle power had resulted in . . . . . . . . among a large number of coal mines.
92. Unit of illumination in S.I. units.
93. The pillars are made of . . . . . . . . in flame safety lamp.
94. The lime, lead, mercury comes under inorganic dust producing group of . . . . . . . .
95. When the flame safety lamp is properly assembled there will be . . . . . . . . of any loose components, if it is shaken by hand.
96. In heavy stone dust barrier the amount of stone dust is loaded is . . . . . . . .
97. The number of persons drowned in Chasnala incident by inundation.
98. The miners work in insanitory conditions may be effected by the . . . . . . . . disease.
99. The lighting arrangements in depillaring areas in deg.I gassy mines, . . . . . . . . watt bulbs cluster if height of working in over 3 m.
100. For illumination in mines, the supply between two phases.
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