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 Removal of oil and grease from sewage, is known Filtration Screening Skimming None of these Filtration Screening Skimming None of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Bio-chemical oxygen demand (BOD) for the first 20 days in generally referred to All of these Initial demand First stage demand Carbonaceous demand All of these Initial demand First stage demand Carbonaceous demand ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Ventilating shafts are provided to a sewer line at every 200 m 150 m 100 m 300 m 200 m 150 m 100 m 300 m ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Drop manholes at the junctions of sewer lines, are provided if Ordinary manhole cannot be built Two sewer lines intersect Sewer line runs along a main road Invert level of a branch sewer is more than 60 cm that of the main sewer Ordinary manhole cannot be built Two sewer lines intersect Sewer line runs along a main road Invert level of a branch sewer is more than 60 cm that of the main sewer ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The flow velocity in detritus tanks is None of these 0.09 m/sec 1.25 m/sec 0.05 m/sec None of these 0.09 m/sec 1.25 m/sec 0.05 m/sec ANSWER DOWNLOAD EXAMIANS APP
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