Page No. 55
High noise level in a chemical plant can be controlled by the_________________?
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Exposure to chemicals having carcinogenic properties cause ____________________?
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COD of raw municipal sewage may be in the range of about _____________ mg/litre?
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‘Pneumoconiosis’ is a disease caused by the inhalation of ______________ dust?
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Main pollutant present in automobile exhaust is_________________?
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Scale formation in boiler is controlled by____________________?
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