Modern incandescent lamps have luminous efficiency is from . . . . . . . .
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Mining Engineering · all questionsMiscellaneous in Mining
Miscellaneous in Mining
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Provision of stone dust barrier has been given in which of the following circulars.
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Illumination of a surface is measured in . . . . . . . .
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Glare is reduced with the use of . . . . . . . .
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The disease caused by inhalation of silica particles.
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The lead acid battery consists of . . . . . . . . cells.
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Fluorescent tubes reduces . . . . . . . .
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In self contained O2 breathing apparatus the weaver can take more O2 than gets through the circuit by the . . . . . . . .
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The cooling agent in protosorb breathing apparatus is . . . . . . . .
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The weight of fuel oil in GL-60 flame safety lamp.
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The company J. K. Dey and sons manufactures of three types of flame safety lamps are . . . . . . . .
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In the metal mines . . . . . . . . persons are worstly affected by dust.
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In water barrier must contain atleast . . . . . . . . of water per sq.m. of road way cross section.
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The unit of illumination is S. I unit.
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Can we use the defective, or repaired components of flame safety lamp.
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No. of washers employed to make outer glass assembly by air tight.
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The minimum average standards of lighting in main junctions in underground in lumens/sq. ft.
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Dustiness of a place may be considered at dustyness content of . . . . . . . . the air is moderatly dusty as per Russian text book.
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The co. efficient of adhesion is, if the surface is dry and free of sand.
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The fuel recommended to carry the percentage test by flame safety lamp.
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