Normal dosage of chlorine in public water supply scheme ranges from __ – McqOptions

MCQOPTIONS

1.	Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.
A.	0.5 to 1
B.	10 to 15
C.	300 to 500
D.	1000 to 1500
Answer» B. 10 to 15

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