Waste Water Engineering The most widely used pump for lifting sewage is Centrifugal pump Reciprocating pump Pneumatic ejector Air pressure pump Centrifugal pump Reciprocating pump Pneumatic ejector Air pressure pump ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is 400 mg/l 200 mg/l 300 mg/l 100 mg/l 400 mg/l 200 mg/l 300 mg/l 100 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The flow velocity in detritus tanks is 1.25 m/sec None of these 0.09 m/sec 0.05 m/sec 1.25 m/sec None of these 0.09 m/sec 0.05 m/sec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is 0.20 cumec 0.12 cumec 0.10 cumec 0.15 cumec 0.20 cumec 0.12 cumec 0.10 cumec 0.15 cumec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Aerobic bacterias Flourish in the presence of free oxygen Oxidise organic matter in sewage Consume organic matter as their food All of these Flourish in the presence of free oxygen Oxidise organic matter in sewage Consume organic matter as their food All of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Which one of the following statements regarding septic tanks is wrong? The minimum width of septic level is 90 cm A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided The outlet invert level is kept 5 to 7.5 cm below the inlet invert level The depth of tank is kept equal to its width The minimum width of septic level is 90 cm A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided The outlet invert level is kept 5 to 7.5 cm below the inlet invert level The depth of tank is kept equal to its width ANSWER DOWNLOAD EXAMIANS APP
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