MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When we take a point between the Boiling line and the freezing line in an enthalpy concentration diagram, then the mixture can exist in _______ in that particular point. |
| A. | Liquid phase |
| B. | Solid state |
| C. | Gaseous state |
| D. | Liquid and gas both |
| Answer» B. Solid state | |
| 2. |
When we take a point between the Boiling line and the dew line in an enthalpy concentration diagram, then the mixture can exist in _______ in that particular point. |
| A. | Liquid phase |
| B. | Solid state |
| C. | Gaseous state |
| D. | Liquid and gas both |
| Answer» E. | |
| 3. |
What is the liquid phase enthalpy of mixture of water and ethanol if the mixture composition on 35% and the temperature of mixture is 87℃? |
| A. | 70 Kcal/kg |
| B. | 80 Kcal/kg |
| C. | 100 Kcal/kg |
| D. | 90 Kcal/kg |
| Answer» E. | |
| 4. |
What is the vapour phase enthalpy of mixture of water and ethanol if the mixture composition on 35% and the temperature of mixture is 87℃? |
| A. | 352 Kcal/kg |
| B. | 302 Kcal/kg |
| C. | 392 Kcal/kg |
| D. | 405 Kcal/kg |
| Answer» D. 405 Kcal/kg | |
| 5. |
What is the enthalpy of mixture of water and ethanol if the mixture composition on 35% and the temperature of mixture is 87℃? |
| A. | 300 Kcal/kg |
| B. | 200 Kcal/kg |
| C. | 250 Kcal/kg |
| D. | 210 Kcal/kg |
| Answer» C. 250 Kcal/kg | |
| 6. |
What is the azeotropic concentration according to the given enthalpy concentration diagram? |
| A. | 95% ethanol |
| B. | 90% ethanol |
| C. | 99% ethanol |
| D. | 5% ethanol |
| Answer» B. 90% ethanol | |
| 7. |
What is the Liquid phase composition if the isothermal temperature is 87℃ and the mixture composition is 30%? |
| A. | 64% ethanol |
| B. | 74% ethanol |
| C. | 54% ethanol |
| D. | 18% ethanol |
| Answer» E. | |
| 8. |
What is the vapour phase composition if the isothermal temperature is 87℃ and the mixture composition is 30%? |
| A. | 44% ethanol |
| B. | 74% ethanol |
| C. | 64% ethanol |
| D. | 18% ethanol |
| Answer» D. 18% ethanol | |
| 9. |
In an enthalpy concentration diagram, the point of intersection of a particular isothermal line to the Dew line is used to calculate _____________ |
| A. | Vapour phase composition |
| B. | Liquid phase composition |
| C. | Water mole fraction |
| D. | Liquid phase weight fraction |
| Answer» B. Liquid phase composition | |
| 10. |
The auxiliary line value ____________ as we move towards higher concentrations in an enthalpy concentration diagram. |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | Exponentially increases |
| Answer» C. Remains same | |
| 11. |
The _________ represents the line of 100% secondary liquid concentration in an enthalpy concentration diagram. |
| A. | Top horizontal axis |
| B. | Left vertical axis |
| C. | Right vertical axis |
| D. | Bottom horizontal axis |
| Answer» D. Bottom horizontal axis | |
| 12. |
With increasing the temperature of the isothermal line, the isothermal lines shift towards___________ in an enthalpy concentration diagram. |
| A. | Greater Concentration |
| B. | Lesser Concentration |
| C. | Upwards |
| D. | Downwards |
| Answer» C. Upwards | |
| 13. |
What is the name of the line that joins the Dew line to the Boiling line in an enthalpy concentration diagram? |
| A. | Azeotropic line |
| B. | Isothermal line |
| C. | Auxiliary line |
| D. | Freezing line |
| Answer» C. Auxiliary line | |
| 14. |
The straight line in the enthalpy concentration diagram is known as ___________ |
| A. | Dew line |
| B. | Azeotropic line |
| C. | Auxiliary line |
| D. | Boiling line |
| Answer» B. Azeotropic line | |