MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 15 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. |
If we have the areas calculated for the three effects as 1512, 1622, and 1892. Then the value we consider to manufacture the three effects of this triple effect evaporator is ______________ |
| A. | 1622 |
| B. | 1512 |
| C. | 1892 |
| D. | Their respective values |
| Answer» D. Their respective values | |
| 2. |
If the three areas obtained from steam calculation are 1512, 1622, and 1892. If the diameter and the length of the tube are 5cm and 150cm respectively, find the number of tubes required in this multiple effect evaporator. |
| A. | 697 |
| B. | 802 |
| C. | 892 |
| D. | 502 |
| Answer» C. 892 | |
| 3. |
The three areas which we calculate from the steam consumption value, only the ________ one is used in calculation of number of tubes. |
| A. | Maximum |
| B. | Minimum |
| C. | Average |
| D. | Median |
| Answer» B. Minimum | |
| 4. |
In a triple effect evaporator, given the enthalpies as and the flow rates calculate the product formation rate in the 2nd effect.Feed rate = 25000kg/hr at 38oC, Feed conc = 0.10, Product conc = 0.50Find the Area of condenser in 2nd effect.U1=2930 Kcal/hr 2 K, U2=1220 Kcal/hr 2 K, U3=610 Kcal/hr 2 K |
| A. | 1702 |
| B. | 1512 |
| C. | 1892 |
| D. | 1552View Answer |
| Answer» B. 1512 | |
| 5. |
In a triple effect evaporator, given the enthalpies as and the flow rates calculate the product formation rate in the 2nd effect.Feed rate = 25000kg/hr at 38℃, Feed conc = 0.10, Product conc = 0.50Find the Area of condenser in 1st effect.U1=2930 Kcal/hr 2 K, U2=1220 Kcal/hr 2 K, U3=610 Kcal/hr 2 K |
| A. | 1622 |
| B. | 1512 |
| C. | 1892 |
| D. | 1552View Answer |
| Answer» E. | |
| 6. |
In a triple effect evaporator, given the enthalpies as and the flow rates calculate the product formation rate in the 2nd effect.Feed rate = 25000kg/hr at 38oC, Feed conc = 0.10, Product conc = 0.50Find the steam consumption rate. |
| A. | 6630 kg/hr |
| B. | 7190 kg/hr |
| C. | 6180 kg/hr |
| D. | 9488 kg/hrView Answer |
| Answer» E. | |
| 7. |
In a triple effect evaporator, given the enthalpies as and the flow ratesFeed rate = 25000kg/hr at 38℃, Feed conc = 0.10, Product conc = 0.50Find the evaporate rate in 1st effect. |
| A. | 6630 kg/hr |
| B. | 7190 kg/hr |
| C. | 6180 kg/hr |
| D. | 5000 kg/hrView Answer |
| Answer» D. 5000 kg/hrView Answer | |
| 8. |
In a triple effect evaporator, given the enthalpies as and the flow rates calculate the product formation rate in the 2nd effect.Feed rate = 25000kg/hr at 38℃, Feed conc = 0.10, Product conc = 0.50Find the evaporate rate in 2nd effect. |
| A. | 6630 kg/hr |
| B. | 7190 kg/hr |
| C. | 6180 kg/hr |
| D. | 5000 kg/hrView Answer |
| Answer» B. 7190 kg/hr | |
| 9. |
In a triple effect evaporator, given the enthalpies as and the flow rates calculate the product formation rate in the 2nd effect.Feed rate = 25000kg/hr at 38℃, Feed conc = 0.10, Product conc = 0.50Find the Area of condenser in 3rd effect.U1=2930 Kcal/hr2 K, U2=1220 Kcal/hr2 K, U3=610 Kcal/hr2 K |
| A. | 164m2 |
| B. | 151m2 |
| C. | 179.5m2 |
| D. | 155m2View Answer |
| Answer» D. 155m2View Answer | |
| 10. |
If we know the heat transfer coefficients of all the effects and the initial and final temperatures of the vapour, we can estimate the intermediate temperatures of the setup. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Which one of the following is the correct equation for enthalpy balance for the final effect in a triple effect evaporator? |
| A. | E2 ∇E2+P2 HP2=EHE+PHP |
| B. | FHF+S∇S=EHE+PHP |
| C. | E1 ∇E1+P1 HP1=E2 HE2+P2 HP2 |
| D. | FHF+S∇S=E1 HE+P1 HP |
| Answer» B. FHF+S∇S=EHE+PHP | |
| 12. |
In a triple effect evaporator, given the enthalpies as and the flow rates calculate the product formation rate in the 2nd effect.Feed rate = 25000kg/hr at 38℃, Feed conc = 0.10, Product conc = 0.50Find the evaporate rate in 3rd effect. |
| A. | 6630 kg/hr |
| B. | 7190 kg/hr |
| C. | 6180 kg/hr |
| D. | 5000 kg/hrView Answer |
| Answer» C. 6180 kg/hr | |
| 13. |
In a triple effect evaporator, given the enthalpies as and the flow rates calculate the evaporation rate in the 2nd effect. Feed rate = 50Kg/hr, Feed conc = 0.3, Product conc = 0.5Find the evaporation rate in 2nd effect. |
| A. | 25.7 kg/hr |
| B. | 20 kg/hr |
| C. | 15 kg/hr |
| D. | 10 kg/hrView Answer |
| Answer» B. 20 kg/hr | |
| 14. |
Which one of the following is the correct equation for enthalpy balance for the 2nd effect in a triple effect evaporator? |
| A. | FHF+S∇S=EHE+EHP |
| B. | FHF+S∇S=EHE+PHP |
| C. | E1 ∇E1+P1HP1=E2 HE2+P2 HP2 |
| D. | FHF+S∇S=E1 HE+P1HP |
| Answer» D. FHF+S∇S=E1 HE+P1HP | |
| 15. |
Which one of the following is the correct equation for enthalpy balance for the 1st effect in a triple effect evaporator? |
| A. | FHF+S∇S=EHE+EHP |
| B. | FHF+S∇S=EHE+PHP |
| C. | E1 HE+P1 HP=E2 HE+P2 HP |
| D. | FHF+S∇S=E1 HE+P1 HP |
| Answer» E. | |