Answered: State if the following statements are…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Transcribed Image Text:State if the following statements are TRUE or FALSE. No explanation is required. Write "True or False" in your answer paper. (a) The Darcy friction factor of a fully-rough turbulent flow is dependent upon Reynolds number and relative roughness. (b) The fully developed velocity profile of a fluid flow exists in the hydrodynamic entrance region of any internal flow pipe. (c) Increasing the roughness of pipe surface increases pressure drop of the fluid flow in pipes operating under all ranges of Reynolds number. (d) A fully-open globe valve causes a higher pressure drop than a fully-open gate valve. (e) Wind blows toward a rectangular billboard (in the normal direction to the billboard). This billboard is subject to pressure drag. No friction drag and no lift are involved. (f) Increasing the surface roughness of a blunted body reduces pressure drag. (g) Only friction drag exerts on a horizontal, very thin flat plate when a stream of air flows in a horizontal direction. No pressure drag and no lift are involved. (h) Streamlining a body reduces both pressure drag and friction drag. (i) The planform area is used for determining drag force exerting on blunted bodies. (j) For an airfoil, friction drag is more significant than pressure drag.

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