AZ ROC A-16 Waterworks Practice Questions - Arizona ROC A-16 Waterworks (Commercial) Examination Exam

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In hydraulic network calculations, how does the Hazen-Williams roughness coefficient (C-factor) affect pipe friction head loss?

A higher C-factor represents a smoother interior pipe surface, resulting in lower friction head loss A higher C-factor represents a rougher interior surface, resulting in higher friction head loss The C-factor only applies to open-channel flow and has no effect on pressurized pipes Friction head loss is directly proportional to the square of the C-factor

Correct Answer:

A higher C-factor represents a smoother interior pipe surface, resulting in lower friction head loss

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