Normally, the amount of water required for flushing operation is _____ litres.

which are the  cause of troubles and odor?

What are the masonry chambers constructed at suitable intervals along sewer lines called?

Which of the following device is used for the removal of oil and grease?

In which sewer joint, bituminous compounds are added?

The color of the secondary sludge produced from the high rate trickling filter is ___________

The minimum design depth of oxidation pond is ___________

Which sewer is also called as submain sewer?

Explosion inside the sewer due to improper ventilation of the explosive gases inside the sewer is a causes of____

Into how many types, the water carriage system is divided?