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 (B) Absolute roughness (C) Friction co-efficient for flows at equal Reynold number (D) All (A), (B) & (C)

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
(B) Absolute roughness
(C) Friction co-efficient for flows at equal Reynold number
(D) All (A), (B) & (C)
by

1 Answer

Answer :

(C) Friction co-efficient for flows at equal Reynold number
by

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