Pressure drop for laminar fluid flow through a circular pipe is given by__________________?
Correct answer: B. 32 (μLV/gc D2)
- A. 4f (L/D) (v2/2gc) ρ
- B. 32 (μLV/gc D2)
- C. 16/NRe
- D. (fLρ/D) (v2/2gc)
Explanation
For fully developed laminar flow in a circular pipe, the Hagen–Poiseuille relation gives ΔP = 32μLV/(gcD²), matching option b. The friction-factor expressions require a stated convention and are not the direct laminar pressure-drop form given here.
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