Steam enters an adiabatic turbine steadily at 5 mpa and 450 c, and leaves at 500 kpa and 200 c. the turbine produces 3.5 mw of power as a result. a) determine the isentropic efficiency of the turbine. is this a reasonable value? b) determine the mass flow rate of the steam required to produce 3.5 mw of power.

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false