Which of the following quantities are computed by using the hydraulic radius for noncircular ducts ?
Correct answer: C. Reynold number, relative roughness and head loss
- A. Velocity and relative roughness
- B. Head loss and velocity
- C. Reynold number, relative roughness and head loss
- D. Reynolds number and friction factor
Explanation
For a noncircular duct, the hydraulic radius gives the equivalent diameter, D_e = 4R_h. This equivalent diameter is used in Reynolds number, relative roughness, and frictional head-loss calculations.
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