The Equation (7 $D ^ { - 2 }$ B) $D ^ { - 3 }$

question 22

Multiple Choice

The equation (7.3.20) for the head loss is valid for both laminar and turbulent flows. We wish to pump the flow rate Q through a long pipe of diameter D, to be selected. The head loss is
Proportional to what power of D, assuming a constant friction factor?

• A) \(D ^ { - 2 }\)
• B) \(D ^ { - 3 }\)
• C) \(D ^ { - 4 }\)
• D) \(D ^ { - 5 }\)

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