Steam undergoes an isentropic expansion process at 80 bar, 440°C enters a piston-cylinder assembly operating at steady state with mass flow rate 20 kg/s. It exits with a pressure of 0.7 bar and a quality of 95%, assume the process is adiabatic, neglect kinetic and potential energy. a. Determine the final temperature.
b. Determine the power developed in kW.
c. Plot T-s diagram

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1