MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following processes exhibit external mechanical irreversibility? |
| A. | isothermal dissipation of work |
| B. | adiabatic dissipation of work |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 2. |
The final temperatures of two bodies, initially at T1 and T2 can range from |
| A. | (T1-T2)/2 to sqrt(T1*T2) |
| B. | (T1+T2)/2 to sqrt(T1*T2) |
| C. | (T1+T2)/2 to (T1*T2) |
| D. | (T1-T2)/2 to (T1*T2) |
| Answer» C. (T1+T2)/2 to (T1*T2) | |
| 3. |
Which of the following can be considered as an application of entropy principle? |
| A. | transfer of heat through a finite temperature difference |
| B. | mixing of two fluids |
| C. | maximum temperature obtainable from two finite bodies |
| D. | all of the mentioned |
| Answer» E. | |
| 4. |
Entropy principle is the quantitative statement of the second law of thermodynamics. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 5. |
The entropy of an isolated system always ____ and becomes a ____ at the state of equilibrium. |
| A. | decreases, minimum |
| B. | increases, maximum |
| C. | increases, minimum |
| D. | decreases, maximum |
| Answer» C. increases, minimum | |
| 6. |
Clausius summarized the first and second laws of thermodynamics as |
| A. | the energy of the world is constant |
| B. | the entropy of the world tends towards a maximum |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
Entropy may decrease locally at some region within the isolated system. How can this statement be justified? |
| A. | this cannot be possible |
| B. | this is possible because entropy of an isolated system can decrease. |
| C. | it must be compensated by a greater increase of entropy somewhere within the system. |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 8. |
According to entropy principle, the entropy of an isolated system can never decrease and remains constant only when the process is reversible. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 9. |
The entropy of an isolated system can never ____ |
| A. | increase |
| B. | decrease |
| C. | be zero |
| D. | none of the mentioned |
| Answer» C. be zero | |