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 It is customary to design a sewer for D.W.F. on the basis of Twice the average demand Average demand Four times the average demand Thrice the average demand Twice the average demand Average demand Four times the average demand Thrice the average demand ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering During preliminary treatment of a sewage Oil and grease are removed from skimming tanks Girt and sand are removed by girt chambers All listed here Floating materials are removed by screening Oil and grease are removed from skimming tanks Girt and sand are removed by girt chambers All listed here Floating materials are removed by screening ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering 5 days-biochemical oxygen demand (BOD5) is taken at a temperature of 0°C 15°C 20°C 25°C 0°C 15°C 20°C 25°C ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In a trickling filter Neither A nor B Biological action is used Filtration process is used Both A and B Neither A nor B Biological action is used Filtration process is used Both A and B ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by Manning Bazin Kutter Chezy Manning Bazin Kutter Chezy ANSWER DOWNLOAD EXAMIANS APP
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