Environmental Engineering The design discharge for the separate sewer system shall be taken as 6 × DWF 3 × DWF 2 × DWF Equal to dry weather flow (DWF) 6 × DWF 3 × DWF 2 × DWF Equal to dry weather flow (DWF) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The settling velocity of a particle in a sedimentation tank increases if None of these The depth of tank is decreased Particle size is decreased The surface area of tank is increased None of these The depth of tank is decreased Particle size is decreased The surface area of tank is increased ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Sewerage system is usually designed for 28 years 25 years 26 years 27 years 28 years 25 years 26 years 27 years ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of 1000 mg/liter 10 mg/liter 1 mg/liter 100 mg/liter 1000 mg/liter 10 mg/liter 1 mg/liter 100 mg/liter 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 400 ppm 200 ppm 100 ppm 300 ppm 400 ppm 200 ppm 100 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The treatment of water with bleaching powder is known as Hypo-chlorination Super chlorination Pre-chlorination De-chlorination Hypo-chlorination Super chlorination Pre-chlorination De-chlorination ANSWER DOWNLOAD EXAMIANS APP
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