MCQOPTIONS
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MCQOPTIONS
This section includes 15 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 variable flow process |
| A. | P.E. terms are neglected |
| B. | K.E. of the fluid is assumed to be small |
| C. | the process is not steady |
| D. | all of the mentioned |
| Answer» E. | |
| 2. |
For charging a tank, |
| A. | enthalpy is converted to work done |
| B. | work done is converted to enthalpy |
| C. | enthalpy is converted to internal energy |
| D. | internal energy is converted to work done |
| Answer» D. internal energy is converted to work done | |
| 3. |
Which of the following is true for a discharging tank? |
| A. | the process is adiabatic |
| B. | the process is quasi-static |
| C. | dQ=0 |
| D. | all of the mentioned |
| Answer» E. | |
| 4. |
In ____ filling a bottle with air at 300K, the gas temperature rises to 420K due to flow work being converted to ____ increase. |
| A. | adiabatically, heat |
| B. | adiabatically, internal energy |
| C. | constant pressure, heat |
| D. | none of the mentioned |
| Answer» C. constant pressure, heat | |
| 5. |
WHICH_OF_THE_FOLLOWING_IS_TRUE_FOR_A_DISCHARGING_TANK??$ |
| A. | the process is adiabatic |
| B. | the process is quasi-static |
| C. | dQ=0 |
| D. | all of the mentioned |
| Answer» E. | |
| 6. |
For a variable flow process$ |
| A. | P.E. terms are neglected |
| B. | K.E. of the fluid is assumed to be small |
| C. | the process is not steady |
| D. | all of the mentioned |
| Answer» E. | |
| 7. |
For charging a tank,$ |
| A. | enthalpy is converted to work done |
| B. | work done is converted to enthalpy |
| C. | enthalpy is converted to internal energy |
| D. | internal energy is converted to work done |
| Answer» D. internal energy is converted to work done | |
| 8. |
In ____ filling a bottle with air at 300K, the gas temperature rises to 420K due to flow work being converted to ____ increase? |
| A. | adiabatically, heat |
| B. | adiabatically, internal energy |
| C. | constant pressure, heat |
| D. | none of the mentioned |
| Answer» C. constant pressure, heat | |
| 9. |
Both the techniques for analysing variable flow processes gives same result. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 10. |
Using system technique, energy balance for the process comes out to be |
| A. | m2u2+m1u1+(m2-m1)(((V^2)/2)+(h/2)) |
| B. | m2u2-m1u1+(m2-m1)(((V^2)/2)+(h/2)) |
| C. | m2u2+m1u1-(m2-m1)(((V^2)/2)+(h/2)) |
| D. | m2u2-m1u1-(m2-m1)(((V^2)/2)+(h/2)) |
| Answer» E. | |
| 11. |
Variable flow processes can be analysed by |
| A. | system technique |
| B. | constant volume technique |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 12. |
Which of the following is true for steady flow? |
| A. | (dE/dt)=0 |
| B. | (dE/dt)>0 |
| C. | (dE/dt)<0 |
| D. | none of the mentioned |
| Answer» B. (dE/dt)>0 | |
| 13. |
Rate of energy increase within the control volume is given by |
| A. | rate of energy inflow + rate of energy outflow |
| B. | rate of energy inflow – rate of energy outflow |
| C. | rate of energy inflow = rate of energy outflow |
| D. | none of the mentioned |
| Answer» C. rate of energy inflow = rate of energy outflow | |
| 14. |
The rate at which the mass of fluid within the control volume is accumulated is equal to the net rate of mass flow across the control surface. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 15. |
Variable flow processes include |
| A. | filling up a gas cylinder |
| B. | evacuating a gas cylinder |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |