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Mech. Eng. 2W04, Winter 2014, Page 1of 2A B 2nd Midterm Some Review Questions 1.The table shown below represents a perfect gas cycle consists of five processes. The cycle starts at 100 kPa and 300 K. Complete the table and draw the cycle on a p-vdiagram. Determine the cycle thermal efficiency and compare with the maximum thermal efficiency that can be achieved. For the gas (R =0.3 kJ/kg.K, k =1.4) process 1-2 2-3 3-4 4-5 5-1 ∆p[kPa] 900 0.0 ∆v[m3/kg] -0.8 0.0 0.1 0.0 ∆T[K] 0.0 0.0 ∆u[kJ/kg] w[kJ/kg] q[kJ/kg] 2.Tank A shown in Figure has a volume of 0.4 m3and contains air at 250 kPa and 30oC. Cylinder B contains a frictionless piston of a mass such that a pressure of 150 kPa inside the cylinder is required to raise the piston. The valve connecting A and B is now opened, allowing gas to low into the cylinder. Eventually, air reaches a uniform state of 150 kPa and 30oC throughout.Calculate the work done by air during this process.3.Steam enters the first-stage turbine shown in Fig. at 40 bar and 500oC with a volumetric flow
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