5 (2pt) The Reynolds number of a flow is defined as (remember that L is the char

Question

5 (2pt) The Reynolds number of a flow is defined as (remember that L is the characteristic length, we used D or diameter for used for pipes) pV.L 6 (2pt) The Froude number of a flow is defined as p-V-L (c) Ev (d) 7 (2pt)What flow number would you use to design a model for wave action? hint, what is the underlie physics principle that governs how waves are formed?) (a) Weber (b) Reynolds (c) Mach (d) Froude 8 (2pt) The Darcy-Weisbach equation is used to calculate friction head loss in a pipe. The expression for the Darcy-Weisbach equation is L V2 (b) hj-f D 2 9 (2pt) The Darcy-Weisbach friction factor ffor a laminar flow in a pipe is given by: (a) 32.2/R (b) 9.806/R (c) 144/R (d) 64/R 10 (2pt) For turbulent flow, the Darcy-Weisbach friction factor f is a function of the relative roughness e/D and of the Reynolds. The graphical representation of the function f (e/D, R) is called the diagram (a) Moody (b) Prandtl (c) von Karman (d) Pascal

Explanation / Answer

5. a as Reynolds number is the ratio of inertial force to viscous force.

6. b

7. d

8.c

9. d

10. a

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