Environmental Engineering in CE Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels. 180 150 120 90 180 150 120 90 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The biological decomposition of organic substances in wastes controlled conditions is called Composting Biological oxidation None of these Incineration Composting Biological oxidation None of these Incineration ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Iron & manganese present as pollutant in water can not be removed by Ion exchange process Oxidation followed by settling & filtration Lime soda process or manganese zeolite process Chlorination Ion exchange process Oxidation followed by settling & filtration Lime soda process or manganese zeolite process Chlorination ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes All of these Asphyxiation (suffocation) Tuberculosis Shortness of breath All of these Asphyxiation (suffocation) Tuberculosis Shortness of breath ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones. 10¹⁵ 10⁹ 10⁵ 10² 10¹⁵ 10⁹ 10⁵ 10² ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Foul odour and bad taste of water is removed by treating with Activated carbon Alum Copper sulphate Bleaching powder Activated carbon Alum Copper sulphate Bleaching powder ANSWER DOWNLOAD EXAMIANS APP
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