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Food Processing Unit Operations Practice Test: Evaporation
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Avg score: 62% Most missed: “Which of the following is called calandria evaporator?”
Evaporation topics include: Evaporators, single and multiple effect evaporators, boiling point elevation, evaporation equipment and heat sensitive materials evaporation. Evaporation is a common method used in food processing to remove water from liquid foods. It involves boiling or vaporizing an aqueous solution to remove water as vapor.  Evaporation is used to: Preservation: Concentrate liquid foods to increase shelf life and reduce microbiological damage Stability: Remove water to improve microbiological stability and reduce storage and transportation costs Pre-concentration: Increase... Show more
Food Processing Unit Operations Practice Test: Evaporation
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25 Questions

1. Where is the feed introduced in climbing film evaporator?
2. What is conduction?
3. Which of the following evaporator is used to avoid crystallization?
4. What is evaporation?
5. How do you increase heat transfer coefficient?
6. Which is the suitable source for heating the evaporators?
7. Which of the following is called wiped film evaporator?
8. Which law governs theboiling point elevation in evaporators?
9. What are modes of heat transfer in evaporators?
10. Why does boiling point elevation occur?
11. Is evaporation and boiling the same?
12. What are the three functional sections present in evaporator?
13. Who discovered evaporation?
14. What are the different modes of feed in multiple effect evaporators?
15. What are the advantages of multiple effect evaporators over single effect evaporator?
16. What are conditions to achieve maximum retention of volatile constituents?
17. Which of the following is called calandria evaporator?
18. What is the alternative name for boiling point elevation?
19. Is boiling point a physical property?
20. Which liquid has lowest boiling point?
21. Are these statements about the distillateto concentrate ratio in evaporators true?
Statement 1: Lack of wall wetting causes fouling.
Statement 2: Fouling depends on the fluid velocity.
22. What is the steam economy of single effect evaporator?
23. What type of evaporators used for heat sensitive materials?
24. What are the principle functions of evaporator?
25. What is the cause of convection heat transfer in evaporators?