Waste Water Engineering If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains Hydrogen sulphide Methane Oxygen Carbon dioxide Hydrogen sulphide Methane Oxygen Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Skimming tanks are Improved version of grit chambers Those from which sludge is skimmed out Tanks provided with self- cleansing screens Used to remove the grease and oil Improved version of grit chambers Those from which sludge is skimmed out Tanks provided with self- cleansing screens Used to remove the grease and oil ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In detritus tanks, Organic and inorganic materials are separated Flow velocity is kept 0.09 m/sec Detention period is kept 3 to 4 minutes All listed here Organic and inorganic materials are separated Flow velocity is kept 0.09 m/sec Detention period is kept 3 to 4 minutes All listed here ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering A circular sewer section is preferred to because It provides maximum hydraulic mean depth It is cheaper in construction It provides maximum area for a given perimeter All listed here It provides maximum hydraulic mean depth It is cheaper in construction It provides maximum area for a given perimeter All listed here ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for Unexpected large scale infiltration of stream water Under estimates of maximum and average flows Unexpected increase in the population All of these Unexpected large scale infiltration of stream water Under estimates of maximum and average flows Unexpected increase in the population All of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is Cement concrete sewers Glazed bricks sewers Stone ware sewers Cast iron sewers Cement concrete sewers Glazed bricks sewers Stone ware sewers Cast iron sewers ANSWER DOWNLOAD EXAMIANS APP
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