Environmental Engineering In facultative stabilization pond, the sewage is treated by Aerobic bacteria only Dual action of aerobic bacteria and anaerobic bacteria Sedimentation Algae only Aerobic bacteria only Dual action of aerobic bacteria and anaerobic bacteria Sedimentation Algae only ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Facultative bacteria are able to work in Absence of oxygen only Presence as well as in absence of oxygen Presence of water Presence of oxygen only Absence of oxygen only Presence as well as in absence of oxygen Presence of water Presence of oxygen only 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 200 ppm 400 ppm 100 ppm 300 ppm 200 ppm 400 ppm 100 ppm 300 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period in coagulation tanks is usually kept as 1 to 2 minutes 30 to 45 minutes 2 to 6 hours 2 to 6 days 1 to 2 minutes 30 to 45 minutes 2 to 6 hours 2 to 6 days ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Sludge volume index is defined as the ratio of Percentage of sludge by volume to percentage of suspended solids by weight Percentage of sludge by volume to percentage of total solids by weight Percentage of suspended solids by weight to percentage of sludge by volume Percentage of total solids by weight to percentage of sludge by volume Percentage of sludge by volume to percentage of suspended solids by weight Percentage of sludge by volume to percentage of total solids by weight Percentage of suspended solids by weight to percentage of sludge by volume Percentage of total solids by weight to percentage of sludge by volume ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The design discharge for the combined sewer system shall be taken as Rainfall + DWF Rainfall + 2 DWF Rainfall + 6 DWF Equal to rainfall Rainfall + DWF Rainfall + 2 DWF Rainfall + 6 DWF Equal to rainfall ANSWER DOWNLOAD EXAMIANS APP
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