Separation Processes Questions and Answers – Mechanical Separations in Biotechnology

This set of Separation Processes Multiple Choice Questions & Answers (MCQs) focuses on “Mechanical Separations in Biotechnology”.

1. Which of the following changes does not induce precipitation?
a) pH
b) Temperature
c) Addition of salts
d) Gravity
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2. What is a special case of precipitation?
a) Distillation
b) Fractional distillation
c) Sedimentation
d) Crystallization
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3. Why is the pH change to induce precipitation not useful for commercialization?
a) Proteins do not precipitate easily
b) The minimum pH is unknown
c) There are large differences in the isoelectric points
d) Carrying a pH meter is not helpful
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4. How does the salting out mechanism not occur?
a) Salt removes water by associating with water molecules
b) Few amount of water is left for proteins
c) Shielding the electrostatic protein-protein changes that account for protein-protein repulsion
d) Creating a barrier between the proteins and water
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5. When are organic solvents not commonly used for precipitation?
a) DNA precipitation
b) RNA precipitation
c) Plasma-protein precipitation
d) Protein separation
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6. How is the physical process of sedimentation not enhanced?
a) Coagulation
b) Flocculation
c) Agglomeration
d) Decantation
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7. How is flocculation defined as?
a) Further agglomeration of small, slowly settling floc formed during coagulation to form a larger floc
b) Cause (a fluid) to change to a solid or semi-solid state
c) Gradually pour (wine, port, or another liquid) from one container into another, typically in order to separate out sediment
d) Deagglomeration to break into smaller particles
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8. Which particles have the largest diameter?
a) Colloidal
b) Flocculated
c) Coagulated
d) Dispersed
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9. If the passes through the device is n=1
The time constant T=1345s
Expected release percent= 95%
Maximum concentration C= 10
Calculate the time required
a) 2344s
b) 4345s
c) 2345s
d) 4028s
View Answer

10. If the passes through the device is n=1
The time constant T=1345s
Expected release percent= 0.85%
Maximum concentration C= 10
Calculate the time required
a) 2344s
b) 4345s
c) 2500s
d) 4028s
View Answer

11. If the passes through the device is n=1
The time constant T=1345s
Expected release percent= 0.89%
Maximum concentration C= 10
Calculate the time required
a) 2000s
b) 2500s
c) 3000s
d) 3400s
View Answer

12. If the passes through the device is n=1
The time constant T=1345s
Expected release percent= 77%
Maximum concentration C= 10
Calculate the time required
a) 2000s
b) 2500s
c) 3000s
d) 3400s
View Answer

13. If the passes through the device is n=1
The time constant T=1345s
Expected release percent= 92%
Maximum concentration C= 10
Calculate the time required
a) 3100s
b) 3200s
c) 3300s
d) 3400s
View Answer

14. If the passes through the device is n=1
The time constant T=1345s
Expected release percent= 87.5%
Maximum concentration C= 10
Calculate the time required
a) 2344s
b) 4566s
c) 2800s
d) 4454s
View Answer

15. If the passes through the device is n=1
The time constant T=1345s
Expected release percent= 83%
Maximum concentration C= 10
Calculate the time required
a) 2344s
b) 4345s
c) 2345s
d) 4028s
View Answer

Sanfoundry Global Education & Learning Series – Separation Processes.

To practice all areas of Separation Processes, here is complete set of 1000+ Multiple Choice Questions and Answers.

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