$($A$)$ True or False

$($T$)($F$)$ In the heat engine we may have an efficiency of $100\%.$

$($T$)($F$)$ The COP of the Heat Pump, theoretically, can be less than $100\%.$

$($B$)$ Calculate the heat transfer in $k\frac{J}{k}g$ for the superheated water vapor going under isentropic expansion in a turbine from $8$MPa,$600C$ to saturated vapor at $125$ kPa $.$

$($C$)$ For the reversible cycle $(123)$ shown below.

Choose the piucess wat no mo iviunimg ravis.

$($T$)($F$)$ Based on the figure, from $12$ the process is adiabatic.

The heating process is $q,$

The cooling process is $q,$

$($D$)$ For the below refrigerator, determine the unknowns based on the values provided in the table. Assume the R$-134$a mass flow rate of $0\mathrm{.}1k\frac{g}{s}.$ Calculate the COPR