MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A piston-cylinder device initially contains air at 150 kPa and 27 C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine the total heat transferred to the air. |
| A. | 747 kJ |
| B. | 757 kJ |
| C. | 767 kJ |
| D. | 777 kJ |
| Answer» D. 777 kJ | |
| 2. |
A piston cylinder contains air at 600 kPa, 290 K and a volume of 0.01m^3. A constant pressure process gives 54 kJ of work out. Find the final volume of the air. |
| A. | 0.05 m^3 |
| B. | 0.01 m^3 |
| C. | 0.10 m^3 |
| D. | 0.15 m^3 |
| Answer» D. 0.15 m^3 | |
| 3. |
The proof that work done in all reversible processes is same can be done by violating Kelvin-Planck statement. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 4. |
The work done by a closed system in a reversible process is always ___ that done in an irreversible process. |
| A. | less than or more than |
| B. | equal to |
| C. | less than |
| D. | more than |
| Answer» E. | |
| 5. |
Which of the following is mostly neglected while doing calculations for finding maximum work? |
| A. | KE |
| B. | PE |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 6. |
Which of the following is true for a closed system? |
| A. | mass entering = mass leaving |
| B. | mass does not enter or leave the system |
| C. | mass entering can be more or less than the mass leaving |
| D. | none of the mentioned |
| Answer» C. mass entering can be more or less than the mass leaving | |
| 7. |
Which of the following is true for a steady flow system? |
| A. | mass entering = mass leaving |
| B. | mass does not enter or leave the system |
| C. | mass entering can be more or less than the mass leaving |
| D. | none of the mentioned |
| Answer» B. mass does not enter or leave the system | |
| 8. |
In an open system, for maximum work, the process must be entirely |
| A. | irreversible |
| B. | reversible |
| C. | adiabatic |
| D. | none of the mentioned |
| Answer» C. adiabatic | |
| 9. |
Work done in all reversible processes is equal. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 10. |
For a process from state 1 to state 2, heat transfer in an irreversible process is given by |
| A. | Q for irreversible=(To)*(S1-S2) |
| B. | Q for irreversible>(To)*(S1-S2) |
| C. | Q for irreversible<(To)*(S1-S2) |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 11. |
For a process from state 1 to state 2, heat transfer in a reversible process is given by |
| A. | Q for reversible=(To)*(S1-S2) |
| B. | Q for reversible=(To)*(S2-S1) |
| C. | Q for reversible=(To)/(S1-S2) |
| D. | Q for reversible=(To)/(S2-S1) |
| Answer» C. Q for reversible=(To)/(S1-S2) | |