WZ9825TD Practice Test

1Single Choice

Water Distribution Operator Class 1 candidates must understand the relationship between turbidity and disinfection. Which statement best describes why operators monitor distribution system turbidity?

A.Turbidity is measured only at the source and has no effect on chlorine residual.
B.High turbidity in the distribution system can shield microorganisms from disinfection and signal a potential breach in system integrity.
C.Turbidity is a direct measurement of chlorine demand and increases only when chlorine is added.
D.Turbidity readings are used solely to calculate customer billing.

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