Environmental Engineering Scour valves are provided At every summit of rising mains At the foot of rising main along the slope to prevent back running of water At street corners to control the flow of water At every depression and dead ends to drain out the waste water that may collect there At every summit of rising mains At the foot of rising main along the slope to prevent back running of water At street corners to control the flow of water At every depression and dead ends to drain out the waste water that may collect there ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In facultative stabilization pond, the sewage is treated by Sedimentation Aerobic bacteria only Algae only Dual action of aerobic bacteria and anaerobic bacteria Sedimentation Aerobic bacteria only Algae only Dual action of aerobic bacteria and anaerobic bacteria 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 400 ppm 200 ppm 300 ppm 100 ppm 400 ppm 200 ppm 300 ppm 100 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The type of valve, which is provided on the suction pipe in a tube-well, is Sluice valve Air relief valve Reflux valve Pressure relief valve Sluice valve Air relief valve Reflux valve Pressure relief valve ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The self cleansing velocity for all sewers in India is usually 1.5 m/sec to 2.0 m/sec 1.0 m/sec to 1.2 m/sec Less than 1.0 m/sec 3.0 m/sec to 3.5 m/sec 1.5 m/sec to 2.0 m/sec 1.0 m/sec to 1.2 m/sec Less than 1.0 m/sec 3.0 m/sec to 3.5 m/sec ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The chemical most commonly used to increase speed of sedimentation of sewage is Lime Copper sulphate Sulphuric acid Sodium permanganate Lime Copper sulphate Sulphuric acid Sodium permanganate ANSWER DOWNLOAD EXAMIANS APP
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