Environmental Engineering The settling velocity of a particle in a sedimentation tank increases if Particle size is decreased The depth of tank is decreased The surface area of tank is increased None of these Particle size is decreased The depth of tank is decreased The surface area of tank is increased None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In water treatment, rapid gravity filters are adopted to remove Floating solids and dissolved inorganic solids Bacteria and colloidal solids Dissolved solids and dissolved gases Dissolved organic substances Floating solids and dissolved inorganic solids Bacteria and colloidal solids Dissolved solids and dissolved gases Dissolved organic substances ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Alum as a coagulant is found to be most effective when pH range of water is 8 to 10 4 to 6 6 to 8 2 to 4 8 to 10 4 to 6 6 to 8 2 to 4 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The suitable method of forecasting population for a young and rapidly increasing city is Arithmetical increase method Graphical method Incremental increase method Geometrical increase method Arithmetical increase method Graphical method Incremental increase method Geometrical increase method ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The main disadvantage of oxidation pond is that Maintenance and operation cost are high None of these Large area is required for construction BOD removal is very low Maintenance and operation cost are high None of these Large area is required for construction BOD removal is very low 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 300 ppm 100 ppm 200 ppm 400 ppm 300 ppm 100 ppm ANSWER DOWNLOAD EXAMIANS APP
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