The self-cleansing velocity of water flowing through pipe lines, is___________________ ?

Related Mcqs:

Pick up the correct statement from the following?

A. Hydrogen sulphide gas in excess, may cause corrosion of concrete sewers B. 4 ppm of Dissolved Oxygen (D.O.) is ensured before discharging the treated sewage in river C. Solubility of oxygen in sewage is 95% of that of distilled water D. All the above...

The ratio of maximum sewage flow to average sewage flow for mains up to 1 m in diameter, is___________________?

A. 1.5 B. 2.0 C. 3.0 D. 4.0...

Ventilating shafts are provided to a sewer line at every__________________?

A. 100 m B. 150 m C. 200 m D. 300 m...

Which one of the following resists hydrogen sulphide corrosion ?

A. R.C.C. B. Glazed stone wares C. Asbestos cement D. Glazed ware...

Fresh sewage may become stale in_________________?

A. One hour B. Two to three hours C. Three to four hours D. Six hours...