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 0.10 cumec 0.12 cumec 0.15 cumec 0.20 cumec 0.10 cumec 0.12 cumec 0.15 cumec 0.20 cumec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The sewage treatment in septic tanks is due to Parasitic decomposition Anaerobic decomposition None of these Aerobic decomposition Parasitic decomposition Anaerobic decomposition None of these Aerobic decomposition ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Which one of the following statements regarding septic tanks is wrong? 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 A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided The minimum width of septic level is 90 cm 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 A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided The minimum width of septic level is 90 cm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of Recovery Active decomposition Cleaner water Degradation Recovery Active decomposition Cleaner water Degradation ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The asbestos cement sewers are All of these Susceptible to corrosion by sulphuric acid Light in weight Not structurally strong to bear large compressive stress All of these Susceptible to corrosion by sulphuric acid Light in weight Not structurally strong to bear large compressive stress ANSWER DOWNLOAD EXAMIANS APP
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