Environmental Engineering The velocity of flow of water in a sedimentation tank is about 5 to 10 cm/sec 15 to 30 cm/hour 15 to 30 cm/minute 15 to 30 cm/sec 5 to 10 cm/sec 15 to 30 cm/hour 15 to 30 cm/minute 15 to 30 cm/sec ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Laying of sewers is usually done with the help of A plane table A compass Sight rails and boning rods A Theodolite A plane table A compass Sight rails and boning rods A Theodolite ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Period of cleaning of slow sand filters is about 2 - 3 months 10 - 12 days 24 - 48 hours 1 - 2 year 2 - 3 months 10 - 12 days 24 - 48 hours 1 - 2 year ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In water treatment, rapid gravity filters are adopted to remove Dissolved solids and dissolved gases Bacteria and colloidal solids Floating solids and dissolved inorganic solids Dissolved organic substances Dissolved solids and dissolved gases Bacteria and colloidal solids Floating solids and dissolved inorganic solids Dissolved organic substances ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about 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 1.0 to 5.0 ppm 0.5 to 1.0 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The percentage of chlorine in fresh bleaching powder is about 20 to 25 10 to 15 30 to 35 40 to 50 20 to 25 10 to 15 30 to 35 40 to 50 ANSWER DOWNLOAD EXAMIANS APP
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