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. |
For a supersonic flow, |
| A. | a convergent passage becomes diffuser and a divergent passage becomes nozzle |
| B. | a divergent passage becomes diffuser and a convergent passage becomes nozzle |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» B. a divergent passage becomes diffuser and a convergent passage becomes nozzle | |
| 2. |
When Mach number, M>1 and flow area increases, then |
| A. | pressure decreases |
| B. | velocity increases |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 3. |
When Mach number, M>1 and flow area decreases, then |
| A. | pressure increases |
| B. | velocity decreases |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 4. |
For a subsonic flow, |
| A. | a convergent passage becomes diffuser and a divergent passage becomes nozzle |
| B. | a divergent passage becomes diffuser and a convergent passage becomes nozzle |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» C. both of the mentioned | |
| 5. |
When Mach number, M<1 and flow area increases, then |
| A. | pressure increases |
| B. | velocity decreases |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 6. |
When Mach number, M<1 and flow area decreases, then |
| A. | pressure decreases |
| B. | velocity increases |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
As pressure decreases, velocity also decreases. |
| A. | true |
| B. | false |
| Answer» C. | |
| 8. |
In adiabatic flow, what remains constant? |
| A. | stagnation temperature |
| B. | stagnation enthalpy |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
The ____ section of a nozzle or diffuser is called throat. |
| A. | constant area |
| B. | maximum |
| C. | minimum |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 10. |
The same passage or duct can be either a diffuser or a nozzle. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 11. |
Which of the following produce continuous change in state of a flowing stream? |
| A. | wall friction |
| B. | changes in cross-sectional area |
| C. | energy effects |
| D. | all of the mentioned |
| Answer» E. | |