MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The efficiency of a Carnot engine operating with reservoir temperatures kept at 100 °C and -23°C will be ___________ |
| A. | (100+23)/100 |
| B. | (100-23)/100 |
| C. | (373+250)/373 |
| D. | (373-250)/373 |
| Answer» E. | |
| 2. |
Assertion: In an isolated system, the entropy increases. |
| A. | Reason: The processes in an isolated system are adiabatic. |
| B. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| C. | Both assertion and reason are true but the reason is not a correct explanation of the assertion |
| D. | Assertion is true but the reason is false |
| E. | Both assertion and reason are false |
| Answer» C. Both assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 3. |
If Cp and Cv are the specific heats for a gas at constant pressure and at constant volume respectively, then the relation Cp-Cv=R is exact for? |
| A. | Ideal and real gases at all pressures |
| B. | Ideal gas at all pressures and real gas at a moderate pressure |
| C. | Ideal gas and nearly true for real gases at high pressure |
| D. | Ideal gas and nearly true for real gases at a moderate pressure |
| Answer» E. | |