Waste Water Engineering The recommended detention period for grit chambers is 5 minutes 3 minutes 2 minutes 1 minute 5 minutes 3 minutes 2 minutes 1 minute ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In septic tanks, Free board of 0.3 m may be provided The baffles or tees are extended up to top level of scum All listed here The clear space between the baffle top and covering slab is about 7.5 cm Free board of 0.3 m may be provided The baffles or tees are extended up to top level of scum All listed here The clear space between the baffle top and covering slab is about 7.5 cm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Traps Are water seals which prevent the entry of foul gases Are used to trap the rats entering sewers Create symphonic action to increase the quick disposal of sewerage Dissolve the foul gases Are water seals which prevent the entry of foul gases Are used to trap the rats entering sewers Create symphonic action to increase the quick disposal of sewerage Dissolve the foul gases 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 If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains Oxygen Carbon dioxide Hydrogen sulphide Methane Oxygen Carbon dioxide Hydrogen sulphide Methane ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The spacing of bars of perforations of fine screens used for the treatment of sewage, is 3 to 5 mm 2 to 3 mm 5 to 8 mm 8 to 10 mm 3 to 5 mm 2 to 3 mm 5 to 8 mm 8 to 10 mm ANSWER DOWNLOAD EXAMIANS APP
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