Food Engineering Practice Test 5

1. ∫_y0^ybdy/(y-y*) gives you _____

None of the mentioned

Height of one transfer unit

Number of transfer units in the column

Height of the entire column

2. Oil seed cakes are obtained by _____

None of the mentioned

Mechanical pressing

Solvent extraction

Solvent extraction & Mechanical pressing

3. Agitator vessels are taller than bubble columns.

False

True

4. _____ is the diagonal of the x-y diagram.

Equilibrium line

Operating line

None of the mentioned

Equilibrium curve

5. After extraction via solvent extraction, the cake serves to be a good source of _____

Carbohydrates

Fats

Fibers

Proteins

6. Which of the following statements is correct with respect to gas absorption?

Sufficient contact time plays an important role in absorption

Adequate contact area plays an important role in absorption

Contact time becomes irrelevant after equilibrium and only the interfacial area plays a crucial role

All of the mentioned

7. Statement 1: Batch crystallizers use the concept of cooling of hot solution/magma.
Statement 2: Control of particle size is poor in a batch crystallizer.

True, True

True, False

False, True

False, False

8. Statement 1: Batch crystallizers are used if the throughput is high.
Statement 2: The operating cost of batch crystallizers is high.

False, False

True, False

True, True

False, True

9. How does the solubility of carbon-di-oxide in coke increase when it is subjected to high pressure?

Interfacial area increases

All of the mentioned

Pressure drop decreases

It shifts the equilibrium to a higher side

10. Coffee powders can be made from which of the following dryers?

Drum dryer

Pneumatic conveyor dryer

Freeze dryer

Spray dryer