What is the rate of backwash water? – McqOptions

MCQOPTIONS

1.	What is the rate of backwash water?
A.	0.3-1 m/min
B.	1-1.5 m/min
C.	0.03-0.3 m/min
D.	15-3 m/min
Answer» B. 1-1.5 m/min

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