Environmental Engineering Period of cleaning of slow sand filters is about 2 - 3 months 1 - 2 year 10 - 12 days 24 - 48 hours 2 - 3 months 1 - 2 year 10 - 12 days 24 - 48 hours ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The characteristics of fresh and septic sewage respectively are Both acidic Both alkaline Alkaline and acidic Acidic and alkaline Both acidic Both alkaline Alkaline and 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 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 8.5 to 10.0 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The phenolic compounds in public water supply should not be more than 0.1 ppm 0.0001 ppm 0.001 ppm 0.01 ppm 0.1 ppm 0.0001 ppm 0.001 ppm 0.01 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The pathogens can be killed by Oxidation Nitrification None of these Chlorination Oxidation Nitrification None of these Chlorination ANSWER DOWNLOAD EXAMIANS APP
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