Environmental Engineering The maximum efficiency of BOD removal is achieved in Trickling filters Oxidation pond Aerated lagoons Oxidation ditch Trickling filters Oxidation pond Aerated lagoons Oxidation ditch ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The main disadvantage of cement concrete sewers is Less life Less strength Difficulty in transportation due to heavy weight Difficulty in construction Less life Less strength Difficulty in transportation due to heavy weight Difficulty in construction ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The rate of filtration in slow sand filters in million litres per day per hectare is about 100 to 150 1400 to 1500 500 to 600 50 to 60 100 to 150 1400 to 1500 500 to 600 50 to 60 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be 300 ppm 200 ppm 100 ppm 400 ppm 300 ppm 200 ppm 100 ppm 400 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The pathogens can be killed by Nitrification None of these Oxidation Chlorination Nitrification None of these Oxidation Chlorination 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 8.5 to 10.0 10.5 to 12.0 4.5 to 6.0 6.5 to 8.0 8.5 to 10.0 10.5 to 12.0 ANSWER DOWNLOAD EXAMIANS APP
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