7. For an ideal Rankine cycle, the processes of turbine and pump are isentropic. 8. When a system is in thermal and mechanical equilibrium with the environment, the value of exergy is 9. The coefficient of performance of an irreversible refrigeration cycle is always less than the coefficient of performance of a reversible refrigeration cycle when each operates between the same two thermal reservoirs.

What is the major drawback of the Merit index? Select one: O a. The merit index can consider only one criterion at a time O b. It is useful only for forming a subjective value of a material O c. The algebra is too hard to be performed successfully O d. There are no drawbacks to the Merit index 2

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