MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 6 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 temperature of sink of Carnot’s engine is 27°C. If the efficiency of the engine is 25%, then the temperature of source must be ___________ |
| A. | 27°C |
| B. | 127°C |
| C. | 227°C |
| D. | 327°C |
| Answer» C. 227°C | |
| 2. |
The efficiency of Carnot’s engine operating between reservoirs, maintained at temperature 27°C and -123°C is ___________ |
| A. | 50% |
| B. | 24% |
| C. | 0.75% |
| D. | 0.4% |
| Answer» B. 24% | |
| 3. |
Assertion: In adiabatic compression, the internal energy and temperature of the system gets decreased. |
| A. | Reason: The adiabatic compression is a slow process. |
| 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» E. Both assertion and reason are false | |
| 4. |
The temperature of sink of Carnot engine is 27°C. Efficiency is 25%. Then ___________ |
| A. | 227°C |
| B. | 327°C |
| C. | 127°C |
| D. | 27°C |
| Answer» D. 27°C | |
| 5. |
The temperature of reservoir of Carnot’s engine operating with an efficiency of 70% is 1000K. What is the temperature of source? |
| A. | 300K |
| B. | 400K |
| C. | 500K |
| D. | 700K |
| Answer» B. 400K | |
| 6. |
In a given process of an ideal gas, dW=0 and the dQ<0. Then for the gas ___________ |
| A. | The temperature will decreases |
| B. | The temperature will increase |
| C. | The pressure will remain constant |
| D. | The temperature will increase |
| Answer» B. The temperature will increase | |