Environmental Engineering The detention period in coagulation tanks is usually kept as 2 to 6 days 1 to 2 minutes 30 to 45 minutes 2 to 6 hours 2 to 6 days 1 to 2 minutes 30 to 45 minutes 2 to 6 hours ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about 0.5 to 1.0 ppm 1.0 to 5.0 ppm 0.01 to 0.05 ppm 0.05 to 0.5 ppm 0.5 to 1.0 ppm 1.0 to 5.0 ppm 0.01 to 0.05 ppm 0.05 to 0.5 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The commonly used material for water supply pipes, which has the properties of being strong, not easily corroded and long life but is heavy and brittle, is Copper Cast iron Steel Reinforced cement concrete Copper Cast iron Steel Reinforced cement concrete ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering As compared to shallow wells, deep wells have Less discharge Less depth More depth More discharge Less discharge Less depth More depth More discharge ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The design discharge for the combined sewer system shall be taken as Rainfall + DWF Equal to rainfall Rainfall + 2 DWF Rainfall + 6 DWF Rainfall + DWF Equal to rainfall Rainfall + 2 DWF Rainfall + 6 DWF ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Disinfection of water results in Killing of disease bacteria Complete sterilisation Removal of turbidity Removal of hardness Killing of disease bacteria Complete sterilisation Removal of turbidity Removal of hardness ANSWER DOWNLOAD EXAMIANS APP
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