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In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of | |
A. | relative roughness. [Wrong Answer] |
B. | absolute roughness. [Wrong Answer] |
C. | friction co-efficient for flows at equal Reynold number. [Correct Answer] |
D. | all (a), (b) & (c). [Wrong Answer] |