______ are used in fine screen so that they do not get clogged up.
(a) Automatic strainers
(b) Spray aerators
(c) Cascade aerators
(d) Gravel bed aerators
I got this question by my school teacher while I was bunking the class.
This intriguing question comes from Types of Screens and Aerators topic in chapter Unit Operations, Screening and Aeration of Environmental Engineering