MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For a reversible heat pump, COP is given by |
| A. | T2/(T1-T2) |
| B. | T1/(T1-T2) |
| C. | T2/(T2-T1) |
| D. | T1/(T2-T1) |
| Answer» C. T2/(T2-T1) | |
| 2. |
For a reversible refrigerator, Coefficient of Performance is given by |
| A. | T2/(T1-T2) |
| B. | T1/(T1-T2) |
| C. | T2/(T2-T1) |
| D. | T1/(T2-T1) |
| Answer» B. T1/(T1-T2) | |
| 3. |
Efficiency of a reversible heat engine is given by |
| A. | 1-(T1/T2) |
| B. | 1-(T2/T1) |
| C. | (T1/T2)-1 |
| D. | (T2/T1)-1 |
| Answer» C. (T1/T2)-1 | |
| 4. |
According to Carnot’s theorem, all heat engines operating between a given constant temperature source and sink, none has a higher efficiency than a reversible engine. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 5. |
FOR_A_REVERSIBLE_REFRIGERATOR,_COEFFICIENT_OF_PERFORMANCE_IS_GIVEN_BY?$ |
| A. | T2/(T1-T2) |
| B. | T1/(T1-T2) |
| C. | T2/(T2-T1) |
| D. | T1/(T2-T1) |
| Answer» B. T1/(T1-T2) | |
| 6. |
For_a_reversible_heat_pump,_COP_is_given_by$ |
| A. | T2/(T1-T2) |
| B. | T1/(T1-T2) |
| C. | T2/(T2-T1) |
| D. | T1/(T2-T1) |
| Answer» C. T2/(T2-T1) | |
| 7. |
Efficiency of a reversible heat engine is given b? |
| A. | 1-(T1/T2) |
| B. | 1-(T2/T1) |
| C. | (T1/T2)-1 |
| D. | (T2/T1)-1 |
| Answer» C. (T1/T2)-1 | |
| 8. |
The efficiency of all reversible heat engines operating between the same heat reservoirs is |
| A. | same |
| B. | independent of the nature of working substance |
| C. | independent of the amount of working substance |
| D. | all of the mentioned |
| Answer» E. | |
| 9. |
According to Carnot’s theorem, all heat engines operating between a given constant temperature source and sink, none has a higher efficiency than a reversible engine.$ |
| A. | true |
| B. | false |
| Answer» B. false | |
| 10. |
Example of reversed heat engine is |
| A. | heat pump |
| B. | refrigerator |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 11. |
The reversed heat engine takes heat from a ___ temperature body, then discharges it to a ___ temperature body and ___ an inward flow of network. |
| A. | high, low, receives |
| B. | low, high, receives |
| C. | high, low, gives |
| D. | low, high, gives |
| Answer» C. high, low, gives | |
| 12. |
The correct sequence of the processes taking place in a carnot cycle is |
| A. | adiabatic -> adiabatic -> isothermal -> isothermal |
| B. | adiabatic -> isothermal -> adiabatic -> isothermal |
| C. | isothermal -> isothermal -> adiabatic -> adiabatic |
| D. | isothermal -> adiabatic -> isothermal -> adiabatic |
| Answer» E. | |
| 13. |
A reversible cycle has following processes. |
| A. | 4 isothermal processes |
| B. | 4 adiabatic processes |
| C. | 2 isothermal and 2 adiabatic processes |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 14. |
Carnot cycle is a reversible cycle. |
| A. | true |
| B. | false |
| Answer» B. false | |