Due to fouling of the pipe wall, the friction factor for the pipe of Example 11.3 increa...

Due to fouling of the pipe wall, the friction factor for the pipe of Example 11.3 increases from 0.02 to 0.03. Determine the new flowrate, assuming all other conditions remain the same. What is the pump efficiency at this new flowrate? Explain how a line valve could be used to vary the flowrate through the pipe of Example 11.3. Would it be better to place the valve upstream or downstream of the pump? Why?