Waste Water Engineering Pick up the incorrect statement from the following for allowing workers to enter sewers Warning signals should be erected The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 minutes Proper tests for the presence of poisonous gases must be carried out The men entering the manhole should be advised to smoke in the sewer Warning signals should be erected The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 minutes Proper tests for the presence of poisonous gases must be carried out The men entering the manhole should be advised to smoke in the sewer ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is 1 in 60 None of these 1 in 100 1 in 120 1 in 60 None of these 1 in 100 1 in 120 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In a trickling filter Neither A nor B Both A and B Biological action is used Filtration process is used Neither A nor B Both A and B Biological action is used Filtration process is used ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For a continuous flow type of sedimentation tanks All listed here Width of the tank is normally kept about 6 m Length of the tank is normally kept 4 to 5 times the width Maximum horizontal flow velocity is limited to 0.3 m/minute All listed here Width of the tank is normally kept about 6 m Length of the tank is normally kept 4 to 5 times the width Maximum horizontal flow velocity is limited to 0.3 m/minute ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of Methane gas Carbondioxide gas Hydrogen sulphide gas Petrol vapours Methane gas Carbondioxide gas Hydrogen sulphide gas Petrol vapours ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The gradient of sewers depends upon Diameter of the sewer Velocity of flow All listed here Discharge Diameter of the sewer Velocity of flow All listed here Discharge ANSWER DOWNLOAD EXAMIANS APP
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