Problems Question 1: Food served at a restaurant should be between 39°C and 49°C when it
is delivered to the customer. The process used to keep the food at the correct
temperature has a process standard deviation of 2°C and the mean value for these
temperatures is 402°C. What is the process capability index of the process?

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.