Breathing get doubled, when CO2 present in a mine is about . . . . . . . .
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Mining Engineering · all questionsMiscellaneous in Mining
Miscellaneous in Mining
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The dustiness can be formed at stone crushing sites about . . . . . . . .
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Safety torches are . . . . . . . . apparatus.
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The chemical contains in the lower container of acetylene portable hand lamp.
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The hot gases of flame rise by . . . . . . . . to the top of the gauzes and through them and the outlet holes at the bonnet.
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Wire gauze is . . . . . . . . conductor of heat.
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The length of bore hole should not be less than . . . . . . . . which working near water logged workings.
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When light falls upon a surface, part of its reflected and part absorbed called.
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The gasses exit by . . . . . . . . holes in the front of the old ham battery.
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The intensity of light measured by . . . . . . . .
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Personal dust samples are suitable for
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Methalaram works on the principle of . . . . . . . .
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In Trigger barrier . . . . . . . . is used.
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The life of the bulb of old ham battery is . . . . . . . . hours.
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Hook warm disease also called . . . . . . . .
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The minimum average standards of lighting in haulage engines and control gear rooms in lumens/sq.ft.
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Reducing the sound power by half would lead to decrease in the dB value by
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The fuel used in GL-5 lamp is . . . . . . . .
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The reason behind chasnala inundation.
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Permissable limit of respirable concentration of dust should be checked on the basis of . . . . . . . .
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