MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Food Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following needs to be taken care of during scale up of crystallizers? |
| A. | Reynolds number |
| B. | Residence time |
| C. | Power supplied to agitator per unit volume |
| D. | All of the mentioned |
| Answer» E. | |
| 2. |
In making of cocoa butter via crystallization, liquid is the desired product. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Statement 1: T-joints in pipelines for crystallization should be avoided as much as possible.Statement 2: Thin liquids should have a slope to drain off liquid. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 4. |
Automated valves should be avoided. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Statement 1: Incrustation may lead to under deposit-corrosion.Statement 2: Scrapers can be used as an agitated medium to avoid incrustation. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 6. |
Incrustation leads to _____ |
| A. | Affects safety |
| B. | Damages equipment |
| C. | Affects product quality |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
Excess nucleation leads to _____ |
| A. | Non-uniform CSD |
| B. | In huge capacity vessels, the crystal-crystal attrition leads to formation of small size particles hence no crystallization |
| C. | Non-uniform CSD, in huge capacity vessels, the crystal-crystal attrition leads to formation of small size particles hence no crystallization |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 8. |
What does excess supersaturating followed by cooling lead to? |
| A. | Primary nucleation |
| B. | Secondary nucleation |
| C. | Both, nucleation and crystal growth in general |
| D. | None of the mentioned |
| Answer» B. Secondary nucleation | |
| 9. |
Heating on the surface of a heat exchanger leads to fouling. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
High residence time encourages _____ |
| A. | Attrition |
| B. | Crystal growth |
| C. | Attrition & Crystal growth |
| D. | None of the mentioned |
| Answer» B. Crystal growth | |
| 11. |
Draft tubes _____ crystal-crystal attrition. Crystals _____ bottom. |
| A. | Increase, should be kept on |
| B. | Increase, should be kept off |
| C. | Decrease, should be kept on |
| D. | Decrease, should be kept off |
| Answer» E. | |
| 12. |
Secondary nucleation involves the collision of crystals. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Advantage of Draft tube baffles crystallizer _____ |
| A. | Re-circulation of a small fraction of mother liquor |
| B. | Selectively separates big particles from the smaller ones |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» C. All of the mentioned | |
| 14. |
Work of Draft tube in Draft tube baffle crystallizer is _____ |
| A. | Maintaining good circulation rate for slurry |
| B. | Reducing energy requirement for mixing |
| C. | Maintaining good circulation rate for slurry & reducing energy requirement for mixing |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 15. |
Statement 1: Forced circulation liquid evaporator-crystallizer has good CSD control.Statement 2: Draft tube baffle crystallizer is flash evaporated for crystallization. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» D. False, True | |