The direction of water in filter beds is reversed for ______

Related Questions

• DC current flows in one direction, while ac current rises from zero to a maximum, then falls to zero in one direction, then rises to a maximum, then falls to zero in the opposite direction.
• Amount of luminous flux emitted from a source in any one direction per unit solid angle is called____________
• The rate of amount of water vapour present to the amount it would have contained, had it been saturated, is known as the ___________
• What is called for the method of removing dust and other particles from water using filters?
• In urban cities like Bangalore, which of the water carriage system is used?
• Rapid filtration is used as the _______ clarifying step in municipal water treatment plants.
• _______ indicates the freshness of grey water.
• Water proofing treatment is one type of