MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
The residence time in climbing/falling film plate evaporator is usually tried to keep low. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The basic design of the climbing/falling film plate evaporator consists of two phases, which are? |
| A. | First climbing phase then falling phase |
| B. | First falling phase then climbing phase |
| C. | Liquid to vapour phase while climbing |
| D. | Liquid to vapour phase while falling |
| Answer» B. First falling phase then climbing phase | |
| 3. |
What is the disadvantage of rising film over falling film? |
| A. | Quick scaling |
| B. | Boiling used |
| C. | Less evaporation |
| D. | Economically inferior |
| Answer» B. Boiling used | |
| 4. |
In which one of the following evaporator, boiling takes place inside the tubes and evaporation later? |
| A. | Falling film evaporator |
| B. | Rising film Evaporator |
| C. | Non- Nucleate Boiling Evaporator |
| D. | Forced Circulation Evaporator |
| Answer» C. Non- Nucleate Boiling Evaporator | |
| 5. |
In case of pharmaceutical industries, which evaporator must be used? |
| A. | Falling film evaporator |
| B. | Nucleate boiling Evaporator |
| C. | Non- Nucleate Boiling Evaporator |
| D. | Forced Circulation Evaporator |
| Answer» B. Nucleate boiling Evaporator | |
| 6. |
For highly viscous solutions, which one is best suited evaporator? |
| A. | Falling film evaporator |
| B. | Nucleate boiling Evaporator |
| C. | Non- Nucleate Boiling Evaporator |
| D. | Forced Circulation Evaporator |
| Answer» B. Nucleate boiling Evaporator | |
| 7. |
Which one of the following is the governing factor for evaporation to take place? |
| A. | Surface area |
| B. | Wall surface area |
| C. | Amount of heat supplied |
| D. | Boiling procedure |
| Answer» B. Wall surface area | |
| 8. |
Where is the heat supplied to an evaporator actually go? |
| A. | 100% to evaporating liquid |
| B. | 99% evaporating the liquid |
| C. | 95% evaporating it and rest in overcoming surface tension |
| D. | 99% in overcoming surface tension |
| Answer» D. 99% in overcoming surface tension | |
| 9. |
In nucleate boiling evaporators, the evaporation occurs at the outer film of the fluid. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
How is Evaporator different from dryers? |
| A. | Final product is not a solid in evaporator |
| B. | Evaporator is less efficient |
| C. | Dryers use boiling to remove liquid |
| D. | Dryers use very high temperatures to remove liquid |
| Answer» B. Evaporator is less efficient | |
| 11. |
If the liquid in use is a fouling liquid, then which one of the following cannot be used as an evaporator? |
| A. | Falling film evaporator |
| B. | Nucleate boiling Evaporator |
| C. | Non- Nucleate Boiling Evaporator |
| D. | Forced Circulation Evaporator |
| Answer» C. Non- Nucleate Boiling Evaporator | |
| 12. |
What is the advantage of basket type evaporators over short tube evaporators? |
| A. | More evaporation per unit time |
| B. | More heat transfer coefficient |
| C. | Basket can be removed to be cleaned |
| D. | Tubes can be removed to be cleaned |
| Answer» E. | |