EXAMIANS
Out of the following, TLV of __________ is the minimum (about 0.02 ppm).
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Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes
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Ionisation potential employed in the industrial electrostatic precipitator is of the order of
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Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
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Higher concentration of CO₂ in atmosphere
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Insufficient washing of sand grains in a rapid sand filter causes
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Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur?
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The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel.
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'Pneumoconiosis' is a disease caused by the inhalation of __________ dust.
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TLV of lead for public sewer/waste water is about __________ ppm.
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