MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the enthalpy change of 30oC system if the heat capacity of air at 38oC is 5 J/oC and heat capacity of water vapor at 38oC is 10 J/oC, enthalpy of vaporization is 10 J, and the humidity is 60%? |
| A. | 14 J |
| B. | 39 J |
| C. | 65 J |
| D. | 94 JView answer |
| Answer» E. | |
| 2. |
What is the enthalpy change of 20oC system if the heat capacity of air at 25oC is 5 J/oC and heat capacity of water vapor at 25oC is 10 J/oC, enthalpy of vaporization is 10 J, and the humidity is 20%? |
| A. | 25 J |
| B. | 37 J |
| C. | 44 J |
| D. | 51 JView answer |
| Answer» C. 44 J | |
| 3. |
What is the enthalpy change of 10oC system if the heat capacity of air at 20oC is 5 J/oC and heat capacity of water vapor at 20oC is 15 J/oC, enthalpy of vaporization is 10 J, and the humidity is 40%? |
| A. | 58 J |
| B. | 84 J |
| C. | 114 J |
| D. | 135 JView answer |
| Answer» D. 135 JView answer | |
| 4. |
What is the enthalpy change of 15oC system if the heat capacity of air at 20oC is 10 J/oC and heat capacity of water vapor at 20oC is 20 J/oC, enthalpy of vaporization is 20 J, and the humidity is 50%? |
| A. | 50 J |
| B. | 60 J |
| C. | 80 J |
| D. | 110 JView answer |
| Answer» E. | |
| 5. |
What is the enthalpy change of the mixture if the enthalpy change of air is 10 J, enthalpy change of water vapor is 15 J, and the humidity is 40%? |
| A. | 10 J |
| B. | 12 J |
| C. | 14 J |
| D. | 16 JView answer |
| Answer» E. | |
| 6. |
What is the temperature of the point of intersection of adiabatic cooling line and specific humid volume line? |
| A. | Wet-bulb temperature |
| B. | Dry-bulb temperature |
| C. | Dew point temperature |
| D. | None of the mentionedView answer |
| Answer» C. Dew point temperature | |
| 7. |
WHAT_IS_THE_TEMPERATURE_OF_THE_POINT_OF_INTERSECTION_OF_ADIABATIC_COOLING_LINE_AND_SPECIFIC_HUMID_VOLUME_LINE??$ |
| A. | Wet-bulb temperature |
| B. | Dry-bulb temperature |
| C. | Dew point temperature |
| D. | None of the mentioned |
| Answer» C. Dew point temperature | |
| 8. |
What is the enthalpy change of 15oC system if the heat capacity of air at 20oC is 10 J/oC and heat capacity of water vapor at 20oC is 20 J/oC, enthalpy of vaporization is 20 J, and the humidity is 50%?$ |
| A. | 50 J |
| B. | 60 J |
| C. | 80 J |
| D. | 110 J |
| Answer» E. | |
| 9. |
What is the enthalpy change of the mixture if the enthalpy change of air is 10 J, enthalpy change of water vapor is 15 J, and the humidity is 40%?$ |
| A. | 10 J |
| B. | 12 J |
| C. | 14 J |
| D. | 16 J |
| Answer» E. | |
| 10. |
What is the enthalpy change of 30oC system if the heat capacity of air at 38oC is 5 J/oC and heat capacity of water vapor at 38oC is 10 J/oC, enthalpy of vaporization is 10 J, and the humidity is 60%? |
| A. | 14 J |
| B. | 39 J |
| C. | 65 J |
| D. | 94 J |
| Answer» E. | |
| 11. |
What is the enthalpy change of 20oC system if the heat capacity of air at 25oC is 5 J/oC and heat capacity of water vapor at 25oC is 10 J/oC, enthalpy of vaporization is 10 J, and the humidity is 20%? |
| A. | 25 J |
| B. | 37 J |
| C. | 44 J |
| D. | 51 J |
| Answer» C. 44 J | |
| 12. |
What is the enthalpy change of 10oC system if the heat capacity of air at 20oC is 5 J/oC and heat capacity of water vapor at 20oC is 15 J/oC, enthalpy of vaporization is 10 J, and the humidity is 40%? |
| A. | 58 J |
| B. | 84 J |
| C. | 114 J |
| D. | 135 J |
| Answer» D. 135 J | |
| 13. |
What happens to water in the humidification process? |
| A. | Evaporates |
| B. | Freezes |
| C. | Saturated |
| D. | None of the mentioned |
| Answer» B. Freezes | |
| 14. |
What is the heat transferred from the system in the humidification process? |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 15. |
What is the humidity at the point of intersection of the dew point curve and wet-bulb line? |
| A. | Dry-bulb Humidity |
| B. | Wet-bulb Humidity |
| C. | Specific Humidity |
| D. | None of the mentioned |
| Answer» B. Wet-bulb Humidity | |
| 16. |
Which of the following is also called adiabatic cooling? |
| A. | Humidification |
| B. | Humidity |
| C. | Humid temperature |
| D. | None of the mentioned |
| Answer» B. Humidity | |
| 17. |
To plot the web-bulb line one information is wet-bulb temperature, what can be the other information? |
| A. | Relative humidity |
| B. | Dry-bulb temperature |
| C. | Humidity |
| D. | All of the mentioned |
| Answer» E. | |
| 18. |
Wet-bulb temperature is based on the equilibrium between rates of energy transfer to the bulb and which of the following? |
| A. | Evaporation of water |
| B. | Saturation of water |
| C. | Freezing of water |
| D. | None of the mentioned |
| Answer» B. Saturation of water | |
| 19. |
In the humidity chart, what does the horizontal axis represent? |
| A. | Air temperature |
| B. | Dry-Bulb temperature |
| C. | Wet-Bulb temperature |
| D. | None of the mentioned |
| Answer» C. Wet-Bulb temperature | |
| 20. |
Humidity chart relates which of the following balances? |
| A. | Momentum and energy balance |
| B. | Material and energy balance |
| C. | Material and momentum balance |
| D. | None of the mentioned |
| Answer» C. Material and momentum balance | |
| 21. |
Which of the following is the humidity chart? |
| A. | Psychrometric chart |
| B. | Psychometric chart |
| C. | Psychological chart |
| D. | None of the mentioned |
| Answer» B. Psychometric chart | |