Environmental Engineering Period of cleaning of slow sand filters is about 1 - 2 year 24 - 48 hours 10 - 12 days 2 - 3 months 1 - 2 year 24 - 48 hours 10 - 12 days 2 - 3 months ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about 100 59 75 50 100 59 75 50 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally Less and less Less and more More and more More and less Less and less Less and more More and more More and less ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Ground water is usually free from Suspended impurities Dissolved impurities None of these Both suspended and dissolved impurities Suspended impurities Dissolved impurities None of these Both suspended and dissolved impurities ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Sewerage system is designed for Maximum and minimum flow Average flow only Maximum flow only Minimum flow only Maximum and minimum flow Average flow only Maximum flow only Minimum flow only ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The percentage of chlorine in fresh bleaching powder is about 20 to 25 10 to 15 30 to 35 40 to 50 20 to 25 10 to 15 30 to 35 40 to 50 ANSWER DOWNLOAD EXAMIANS APP
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