Environmental Engineering Period of cleaning of slow sand filters is about 2 - 3 months 1 - 2 year 24 - 48 hours 10 - 12 days 2 - 3 months 1 - 2 year 24 - 48 hours 10 - 12 days ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The characteristics of fresh and septic sewage respectively are Both alkaline Alkaline and acidic Both acidic Acidic and alkaline Both alkaline Alkaline and acidic Both acidic Acidic and alkaline ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as 8.5 to 10.0 4.5 to 6.0 6.5 to 8.0 10.5 to 12.0 8.5 to 10.0 4.5 to 6.0 6.5 to 8.0 10.5 to 12.0 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The phenolic compounds in public water supply should not be more than 0.001 ppm 0.1 ppm 0.0001 ppm 0.01 ppm 0.001 ppm 0.1 ppm 0.0001 ppm 0.01 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The pathogens can be killed by Oxidation Chlorination None of these Nitrification Oxidation Chlorination None of these Nitrification ANSWER DOWNLOAD EXAMIANS APP
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