7. A shallow pond in which the sewage is retained and biologically treated is called
o oxidation
o lagoon
o Imhoff tank
o skimming tank
Ans: A
o oxidation
o lagoon
o Imhoff tank
o skimming tank
Ans: A
Showing posts with label Online test for Environmental Engineering. Show all posts
Showing posts with label Online test for Environmental Engineering. Show all posts
Tuesday, 25 April 2017
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