Environmental Engineering The effective size of sand particles used in slow sand filters is 0.35 to 0.60 mm 0.25 to 0.35 mm 0.60 to 1.00 mm 1.00 to 1.80 mm 0.35 to 0.60 mm 0.25 to 0.35 mm 0.60 to 1.00 mm 1.00 to 1.80 mm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally More and less Less and more More and more Less and less More and less Less and more More and more Less and less ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The rate of filtration in slow sand filters in million litres per day per hectare is about 1400 to 1500 50 to 60 500 to 600 100 to 150 1400 to 1500 50 to 60 500 to 600 100 to 150 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The most common cause of acidity in water is Oxygen Nitrogen Hydrogen Carbon dioxide Oxygen Nitrogen Hydrogen Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Disinfection of water results in Complete sterilisation Killing of disease bacteria Removal of hardness Removal of turbidity Complete sterilisation Killing of disease bacteria Removal of hardness Removal of turbidity ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The maximum efficiency of BOD removal is achieved in Trickling filters Oxidation ditch Oxidation pond Aerated lagoons Trickling filters Oxidation ditch Oxidation pond Aerated lagoons ANSWER DOWNLOAD EXAMIANS APP
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