HKIE Professional Assessment - Chemical Discipline Practice Questions - HKIE Professional Assessment - Chemical Discipline (Hong Kong Institution Of Engineers) Exam

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According to the Darcy-Weisbach equation h_f = f × (L/D) × (v² / 2g), if the fluid velocity v in a pipe is doubled while keeping pipe diameter D, length L, and friction factor f constant, how does the head loss h_f change?

Head loss remains unchanged Head loss doubles (2x) Head loss increases by a factor of 4 (4x) Head loss increases by a factor of 8 (8x)

Correct Answer:

Head loss increases by a factor of 4 (4x)

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