Environmental Engineering The maximum efficiency of BOD removal is achieved in Oxidation ditch Trickling filters Aerated lagoons Oxidation pond Oxidation ditch Trickling filters Aerated lagoons Oxidation pond ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Ground water is usually free from Both suspended and dissolved impurities Dissolved impurities Suspended impurities None of these Both suspended and dissolved impurities Dissolved impurities Suspended impurities None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Cleaning is done by (i) Scraping and removal in filters slow sand (ii) Back washing in slow sand filters (iii) Scraping and removal in filters rapid sand (iv) Back washing in rapid sand filters The correct answer is (ii) and (iv) (ii) and (iii) (i) and (iv) (i) and (ii) (ii) and (iv) (ii) and (iii) (i) and (iv) (i) and (ii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering On standard silica scale, the turbidity in drinking water should be limited to 10 ppm 50 ppm 20 ppm 30 ppm 10 ppm 50 ppm 20 ppm 30 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The velocity of flow does not depend on Roughness of sewer Length of sewer Hydraulic mean depth of sewer Grade of sewer Roughness of sewer Length of sewer Hydraulic mean depth of sewer Grade of sewer 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 100 ppm 400 ppm 200 ppm 300 ppm 100 ppm 400 ppm 200 ppm ANSWER DOWNLOAD EXAMIANS APP
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