Back washing of rapid gravity filters, may face rough weather, due to:
AAir binding
BMud-balls
CNegative head
DChecking of filters
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Related Questions:
Which of the following would help prevent escape of foul sewer gases from water closet:
The process of killing pathogenic bacteria of water borne diseases to make it safe for use in hospital is called:
The organic impurities in water form a layer on the top of the filtering media. Such a layer called:
The self cleaning velocity of the sewers is:
A sanitary sewer is expected to run