Environmental Engineering The biochemical treatment of sewage effluents is essentially a process of Alkalinization Oxidation Reduction Dehydration Alkalinization Oxidation Reduction Dehydration ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Dissolved oxygen in streams is Minimum at noon Maximum at noon Maximum at midnight Same throughout the day Minimum at noon Maximum at noon Maximum at midnight Same throughout the day ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about 1.0 to 5.0 ppm 0.5 to 1.0 ppm 0.01 to 0.05 ppm 0.05 to 0.5 ppm 1.0 to 5.0 ppm 0.5 to 1.0 ppm 0.01 to 0.05 ppm 0.05 to 0.5 ppm 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 50 to 60 500 to 600 1400 to 1500 100 to 150 50 to 60 500 to 600 1400 to 1500 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 200 ppm 400 ppm 300 ppm 100 ppm 200 ppm 400 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The design discharge for the separate sewer system shall be taken as 2 × DWF 3 × DWF Equal to dry weather flow (DWF) 6 × DWF 2 × DWF 3 × DWF Equal to dry weather flow (DWF) 6 × DWF ANSWER DOWNLOAD EXAMIANS APP
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