Waste Water Engineering Cement concrete sewers are only suitable if non-scouring velocity is between 4.5 to 5.5 m/sec 2.5 to 3.0 m/sec 3.5 to 4.5 m/sec 3.0 to 4.0 m/sec 4.5 to 5.5 m/sec 2.5 to 3.0 m/sec 3.5 to 4.5 m/sec 3.0 to 4.0 m/sec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of Active decomposition Recovery Degradation Cleaner water Active decomposition Recovery Degradation Cleaner water ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The temperature affects the Viscosity of sewage Biological activity of bacteria in sewage Solubility of gases in sewage All of these Viscosity of sewage Biological activity of bacteria in sewage Solubility of gases in sewage All of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The coagulant which is generally not used for treating the sewage, is Ferric chloride Alum Chlorinated coppers Ferric sulphate Ferric chloride Alum Chlorinated coppers Ferric sulphate ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The gas evolved in sewers is Methane Carbondioxide Hydrogen sulphide All of these Methane Carbondioxide Hydrogen sulphide All of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of Hydrochloric acid Citric acid Nitric acid Sulphuric acid Hydrochloric acid Citric acid Nitric acid Sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
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