c2ep-water-distribution-operator-class-4 Practice Test

1Single Choice

When breakpoint chlorination is achieved in a water distribution system, what is the primary chemical significance of reaching the breakpoint?

A.All chlorine residual has been reduced to chloride ion and no longer provides disinfection.
B.Free chlorine residual has been established and combined chlorine compounds have been oxidized.
C.The pH of the water has dropped below 7.0, requiring pH adjustment before distribution.
D.Chlorine demand has reached a level where additional dosage is no longer measurable.

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