Environmental Engineering The overflow rate for plain sedimentation tanks is about 1000 to 1250 liters/hour/ m² 500 to 750 liters/hour/ m² 1250 to 1500 liters/hour/m² 1500 to 2000 liters/hour/m² 1000 to 1250 liters/hour/ m² 500 to 750 liters/hour/ m² 1250 to 1500 liters/hour/m² 1500 to 2000 liters/hour/m² ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The major disadvantage of lime soda process of water softening is that Huge amount of precipitate is formed which creates a disposal problem The effluent cannot be reduced to zero hardness It is unsuitable for softening the water of excessive hardness It is unsuitable for turbid and acidic water Huge amount of precipitate is formed which creates a disposal problem The effluent cannot be reduced to zero hardness It is unsuitable for softening the water of excessive hardness It is unsuitable for turbid and acidic water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The rate of filtration in slow sand filters in million litres per day per hectare is about 500 to 600 50 to 60 100 to 150 1400 to 1500 500 to 600 50 to 60 100 to 150 1400 to 1500 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Air binding phenomena in rapid sand filters occur due to Excessive negative head Higher turbidity in the effluent Low temperature Mud ball formation Excessive negative head Higher turbidity in the effluent Low temperature Mud ball formation ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Double filtration is used All of these To increase the filtration slow sand filters capacity of For isolated buildings like pools, hotels etc swimming To increase the filtration rapid sand filters capacity of All of these To increase the filtration slow sand filters capacity of For isolated buildings like pools, hotels etc swimming To increase the filtration rapid sand filters capacity of ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The type of valve which is provided to control the flow of water in the distribution system at street corners and where the pipe lines intersect is Scour valve Check valve Sluice valve Safety valve Scour valve Check valve Sluice valve Safety valve ANSWER DOWNLOAD EXAMIANS APP
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