Maximum permissible residual chlorine in treated water should be _____ – McqOptions

MCQOPTIONS

1.	Maximum permissible residual chlorine in treated water should be __________ mg/litre.
A.	0.001 to 0.01
B.	02 to 0.3
C.	2 to 3
D.	5 to 10
Answer» C. 2 to 3

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