Assignment 3 solution

Assignment 3 solution - Question 1 8-90C The primary...

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Question 1 8-90C The primary considerations when selecting a flowmeter are cost, size, pressure drop, capacity, accuracy, and reliability. 8-93C The positive displacement flow meters operate by trapping a certain amount of incoming fluid, displacing it to the discharge side of the meter, and counting the number of such discharge-recharge cycles to determine the total amount of fluid displaced. They are commonly used to meter gasoline, water, and natural gas because they are simple, reliable, inexpensive, and highly accurate even when the flow is unsteady. 8-57C The loss coefficient is lower for flow through sharp turns in 90° miter elbows than it is for flow through smooth curved surfaces. Therefore, using miter elbows will result in a greater reduction in pumping power requirements. 13-7C The presence of an obstruction in a channel such as a gate or a change in slope or cross-section causes the flow depth to vary, and thus the flow to become varied or nonuniform. The varied flow is called
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