Civil Engineering MCQAE Level Civil Engineering
Breakpoint chlorination is achieved when:
Environmental EngineeringEnvironmental EngineeringHARD
Choose the correct answer
A
chlorine dose is zero
B
chlorine demand is satisfied and free residual chlorine begins to appear
C
pH becomes exactly 7
D
all turbidity is removed by filtration only
Correct Answer
B. chlorine demand is satisfied and free residual chlorine begins to appear
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After oxidation of reducing substances and chloramines, further chlorine produces free residual chlorine beyond breakpoint.
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