1. 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 . . . . . . . .
2. The bulb of old ham lead acid battery is filled with . . . . . . . .
3. When methane is burnt two gasses are formed with a blue flame. Name the gases.
4. The greatest danger of pneumo coniosis in the size of dust is . . . . . . . .
5. 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.
6. Normal life of lead acid batter is . . . . . . . . Years
7. Booster fan generally used in . . . . . . . .
8. The power can be used at voltage not exceeding . . . . . . . . V in bulbs/lights.
9. 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.
10. CaCl2 and Calsolene oil are chemicals which are used to keep the dust.
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