Food Engineering Practice Test 4

1. Statement 1: Diffusion is faster than convective mass transfer.
Statement 2: Mass transfer is proportional to the area of contact.

2. Which of the following is also called Oxygen balancing method?

3. Radiation dryers use _____

4. Mixed feed arrangement offers the advantage of omitting the usage of pumps by transferring feed in the direction of low pressure. That’s an advantage taken from forward feeding arrangement.

5. Cabinet tray dryers are not very effective as they do not completely strip off the moisture content from the food item. Hence, they need to be combined with another dryer for effective results.

6. Industry A is low on budget and is used in the sugar industry. Industry B wants to invest in a good evaporator. They are needed for meat extracts. Which evaporators will you suggest for each of them?

7. Statement 1: Horizontal tube evaporator is easy for cleaning.
Statement 2: Horizontal tube evaporator has a disadvantage of hindering agitation of the feed.

8. In a jacketed vessel, the only way to increase the heat transfer rates is to increase the temperature difference.

9. Statement 1: Boiling point rise is due to the colligative properties due to the presence of solid particles in the solvent.
Statement 2: Boiling point rise is due to the increase in pressure at the bottom of the solvent due to hydro-static head of the column.

10. Statement 1: Cabinet tray dyers can be used for heat sensitive materials.
Statement 2: Bin dryer is used for materials which follow the falling rate drying curve.