1-Entropy can be transferred across the control volume boundary by all of the fo

ID: 1766474 • Letter: 1

Question

1-Entropy can be transferred across the control volume boundary by all of the following mechanisms except:

A transferred with the mass flow

B transferred with the heat flow

C Transferred with the work

2-The rate of change of entropy in a control volume can never be negative.

A True

B False

3-For a steady adiabatic process with one inlet and one outlet, the entropy at the exit of device must be greater than the entropy at the entrance.

A True

B False

4-The entropy production rate can be calculated separately for each component in a system.

A True

B False

5-The entropy production can be used to rank components for improvement by engineering better components with lower losses.

A True

B False

6-The entropy production rate can be used to determine if the processes in a component violate the second law.

A True

B False

1) C) Transferred with the work....because work is fully available energy

2) B) False...It can be negative if heat is rejected from the control volume

3) A) True

4) A) True

5) A) True

6) A) True

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