Waste Water Engineering To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of Citric acid Sulphuric acid Hydrochloric acid Nitric acid Citric acid Sulphuric acid Hydrochloric acid Nitric acid ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering To maintain aerobic biological activity, the moisture content of the compost mass should be about 0.6 0.45 0.55 0.5 0.6 0.45 0.55 0.5 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering ‘Cowl’ is provided at Upper end of the manhole Lower end of ventilating column Upper end of ventilating column First step in manhole Upper end of the manhole Lower end of ventilating column Upper end of ventilating column First step in manhole ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The sewage is pumped up From basements From flat areas From low lying areas All listed here From basements From flat areas From low lying areas All listed here ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The minimum diameter of sewer to be adopted is 12.5 cm 10 cm 15 cm 25 cm 12.5 cm 10 cm 15 cm 25 cm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The rate of accumulation of sludge in septic tanks is recommended as 25 litres/person/year 30 litres/person/year 30 litres/person/month 25 litres/person/month 25 litres/person/year 30 litres/person/year 30 litres/person/month 25 litres/person/month ANSWER DOWNLOAD EXAMIANS APP
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