MCQOPTIONS
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MCQOPTIONS
This section includes 10 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 control mass gives out 10 kJ of energy in the form of heat transfer at 500°C. Find the change in availability of the control mass. |
| A. | −4.14 kJ |
| B. | −5.14 kJ |
| C. | −6.14 kJ |
| D. | −7.14 kJ |
| Answer» C. −6.14 kJ | |
| 2. |
Find the availability when 100 kW is delivered at 500 K when the ambient temperature is 300 K. |
| A. | 20 kW |
| B. | 30 kW |
| C. | 40 kW |
| D. | 50 kW |
| Answer» D. 50 kW | |
| 3. |
If the process is irreversible, the useful work is less than the maximum. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 4. |
Gibbs function G is given by |
| A. | G=H-TS |
| B. | G=U+pV-TS |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 5. |
The Helmholtz function F is given by |
| A. | U-TS |
| B. | U+TS |
| C. | -U-TS |
| D. | -U+TS |
| Answer» B. U+TS | |
| 6. |
Which of the following is true for an internal combustion engine? |
| A. | the reactants are in pressure and temperature equilibrium with the surroundings |
| B. | the products are in pressure and temperature equilibrium with the surroundings |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
Availability function for a steady flow system is given by |
| A. | H+TS+(m*V*V/2)+(m*g*z) |
| B. | H-TS+(m*V*V/2)+(m*g*z) |
| C. | H-TS-(m*V*V/2)-(m*g*z) |
| D. | H-TS-(m*V*V/2)+(m*g*z) |
| Answer» C. H-TS-(m*V*V/2)-(m*g*z) | |
| 8. |
Availability is a composite property. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 9. |
The availability(A) of a given system is defined as the ____ work that is obtainable in a process in which system comes to equilibrium with its surroundings. |
| A. | of a given system is defined as the ____ work that is obtainable in a process in which system comes to equilibrium with its surroundings.a) useful work |
| B. | maximum useful work |
| C. | minimum useful work |
| D. | none of the mentioned |
| Answer» C. minimum useful work | |
| 10. |
When we obtain useful work during a process in which a finite system undergoes a change of state, when should that process terminate? |
| A. | when the pressure of system equals the pressure of surroundings |
| B. | when the temperature of system equals the temperature of surroundings |
| C. | when the system has reached the dead state |
| D. | all of the mentioned |
| Answer» E. | |