Waste Water Engineering For detecting the nitrates in sewage, the colour may be developed by adding Phenol-di -sulphuric acid and potassium hydroxide None of these Sulphuric acid and napthamine Potassium permanganate Phenol-di -sulphuric acid and potassium hydroxide None of these Sulphuric acid and napthamine Potassium permanganate ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering During preliminary treatment of a sewage Floating materials are removed by screening All listed here Girt and sand are removed by girt chambers Oil and grease are removed from skimming tanks Floating materials are removed by screening All listed here Girt and sand are removed by girt chambers Oil and grease are removed from skimming tanks ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering At the junction of sewers Tops of both the sewers are at the same level Top of smaller sewer is kept lower Top of larger sewer is kept lower None of these Tops of both the sewers are at the same level Top of smaller sewer is kept lower Top of larger sewer is kept lower None of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The self-cleansing velocity of water flowing through pipe lines, is 1 metre/sec 0.25 metre/sec 2 metres/sec 0.5 metre/sec 1 metre/sec 0.25 metre/sec 2 metres/sec 0.5 metre/sec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient, Is only provided Is trebled Is doubled Is not enough Is only provided Is trebled Is doubled Is not enough ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering 5 days-biochemical oxygen demand (BOD5) is taken at a temperature of 15°C 0°C 25°C 20°C 15°C 0°C 25°C 20°C ANSWER DOWNLOAD EXAMIANS APP
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