Water flows at a rate of 2.4 ft³/s in an old, rusty 7.8-in.-diameter pipe that has a relative roughness of 0.010. It is proposed that by inserting a smooth plastic liner with an inside diameter of 7.0 in. into the old pipe as shown in the Figure the pressure drop per mile can be reduced. Is it true that the lined pipe can carry the required 2.4 ft³/s at a lower pressure drop than in the old pipe? Support your answer with appropriate calculations. 7.8in. Old Pressure drop is a function of flow rate and roughness. What is the mean velocity for the current 7.8 in. diameter pipe? V₂= 7.23 ft/s What is the Reynolds number for the current 7.8 in diameter pipe? Re=i447444 What is the friction factor for the current 7.8 in diameter pipe? fo = i 0.0122 -Liner 7.0in. New

Water flows at a rate of 2.4 ft³/s in an old, rusty 7.8-in.-diameter pipe that has a relative roughness of 0.010. It is proposed that by inserting a smooth plastic liner with an inside diameter of 7.0 in. into the old pipe as shown in the Figure the pressure drop per mile can be reduced. Is it true that the lined pipe can carry the required 2.4 ft³/s at a lower pressure drop than in the old pipe? Support your answer with appropriate calculations. 7.8in. Old Pressure drop is a function of flow rate and roughness. What is the mean velocity for the current 7.8 in. diameter pipe? V₂= 7.23 ft/s What is the Reynolds number for the current 7.8 in diameter pipe? Re=i447444 What is the friction factor for the current 7.8 in diameter pipe? fo = i 0.0122 -Liner 7.0in. New

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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Concept explainers

Corrosion control methods

Corrosion may be defined as the method in which metals are attacked on their exteriors by gases existing in the atmosphere, converting them to their oxides, nitrides, sulfides, etc.

Question

Please help correct the following parts with step-by-step:

Water flows at a rate of 2.4 ft³/s in an old, rusty 7.8-in.-diameter pipe that has a relative roughness of 0.010. It is proposed that by
inserting a smooth plastic liner with an inside diameter of 7.0 in. into the old pipe as shown in the Figure the pressure drop per
mile can be reduced. Is it true that the lined pipe can carry the required 2.4 ft³/s at a lower pressure drop than in the old pipe?
Support your answer with appropriate calculations.
7.8in.
15.771
Old
Pressure drop is a function of flow rate and roughness.
What is the mean velocity for the current 7.8 in. diameter pipe?
V₂ = 7.23
ft/s
What is the Reynolds number for the current 7.8 in diameter pipe?
Rei 447444
What is the friction factor for the current 7.8 in diameter pipe?
fo = i 0.0122
What is the pressure dropper mile for the current 7.8 in diameter pipe?
Δρο = i
psi/mile
-Liner
7.0in.
New

Pressure drop is a function of flow rate and roughness.
What is the mean velocity for the new 7.0 in. diameter pipe?
V₁ = 8.93
ft/s
What is the Reynolds number for the new 7.0 in diameter pipe?
Rei 539717.5
What is the friction factor for the new 7.0 in diameter pipe?
foi 0.0116
What is the pressure drop per mile for the new 7.0 in diameter pipe?
Δρο = i
psi/mile
20.75

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