In_which_type_of_under_drainage_system_of_rapid_sand_filter,_laterals_ – McqOptions

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1.	In_which_type_of_under_drainage_system_of_rapid_sand_filter,_laterals_are_provided_with_strainers?$
A.	Perforated pipe system
B.	Pipe and strainer system
C.	Wheeler system
D.	Wagner system
Answer» C. Wheeler system

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