At a constriction in a pipe the flow velocity will decrease and the pressure wil

Question

At a constriction in a pipe the flow velocity will decrease and the pressure will rise. In a frictionless pipe system, if the flow velocity is constant the EGL will be horizontal. Gage pressures are measured using absolute zero (total vacuum) as the zero reference. The Manning's roughness coefficient for a smooth pipe is higher than the coefficient for a rough pipe. The higher the flow velocity, the larger the difference between the HGL and the EGL. A equivalent pipe is an (a) average length of pipe replacing a looped pipe system (b) average pipe diameter replacing a series or parallel pipe system (c) average pipe that has a minimum head loss for a given flow (e) theoretical pipe that replaces a section of a real system so that the head loss in the two system are identical for any flow What type of flow regime is appropriate for the application on Manning's equation? (a) Gradually varied flow (b) Non-uniform flow (c) Uniform flow (d) None of these The Hazen Williams roughness coefficient for a smooth pipe is higher than the coefficient for a rough pipe. In a frictionless pipe system, if the flow velocity is constant the EGL will be horizontal. The EGL is a graph of the sum of the pressure head and elevation head.

Explanation / Answer

1.) False

2.) True

3.) False

4.) True

5.) True

6.) e

7.) c

8.) True

9.) True

10.) True

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