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Polytechnic University of Puerto Rico Department of Mechanical Engineering FINAL EXAM Course: Thermonuids, ENGI 3440 seetion: 23 February 17, 2014 Professor: Dr. Hugo Pelaez Student name 1- ablish the best association (10 pesl esteirave Propurty Energy Friction fac lin gh Reytoid'silu nite Enthalpy n laminar reversible processes Pipe accessories (fitting Dere used to find ffor turbulent flau iy Pipe network Colabrook formula node and loop concepts apply 2. Moody's diagram is isad eo solve kors by triction in pipe system problems. Which variable ik not included in this diaporam? (5 ptsh Reynold's number c) Temperature 3. True IT or false (F (5 pes) al A piston is an example of a deforming control volume. b) The efficiency on of a power cycle can be incremented if we raise the hot reservoir temperature c) The enthalpy change of a throttling device is always greater than zero d) In a nozzle the gas or liquid decelerates in the direction of flow e) A flow is transitional if Reynolds number remains between 2100 and 4000

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