Environmental Engineering The percentage of filtered water, which is used for backwashing in rapid sand filters, is about 5 to 7 2 to 4 0.4 to 1.0 0.2 to 0.4 5 to 7 2 to 4 0.4 to 1.0 0.2 to 0.4 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Standard BOD is measured at 20°C - 5 day 25°C - 3 day 20°C - 1 day 30°C - 5 day 20°C - 5 day 25°C - 3 day 20°C - 1 day 30°C - 5 day ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering A sewer that receives the discharge of a number of house sewers is called House sewer Sub-main sewer Lateral sewer Intercepting sewer House sewer Sub-main sewer Lateral sewer Intercepting sewer ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The characteristics of fresh and septic sewage respectively are Acidic and alkaline Both acidic Alkaline and acidic Both alkaline Acidic and alkaline Both acidic Alkaline and acidic Both alkaline ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is (i) Presumptive coli-form test (ii) Confirmed coli-form test (iii) Completed coli-form test Only (i) Both (i) and (iii) Both (i) and (ii) All (i), (ii) and (iii) Only (i) Both (i) and (iii) Both (i) and (ii) All (i), (ii) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The water carriage system of collection of waste product Requires treatment before disposal All of these Creates hygienic problem Is cheaper in initial cost than dry conservancy system Requires treatment before disposal All of these Creates hygienic problem Is cheaper in initial cost than dry conservancy system ANSWER DOWNLOAD EXAMIANS APP
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