EXAMIANS
The earth's atmosphere is an envelope of gases present upto a height of about __________ kms.
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Water effluent generated in printing industry is decolourised by
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Inorganic impurities causing water pollution is
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Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
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TLV of NO₂ & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO₂ causes
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'Pneumoconiosis' is a disease caused by the inhalation of __________ dust.
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In water treatment, alum[Al2(SO₄)3] is used for the process of
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Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by
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Septic tank is a(i) Settling tank(ii) Digestion tank(iii) Aeration tank
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The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant?
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