Sedimentation MCQ : Here you will find MCQ Questions related to "Sedimentation" in Food Processing Unit Operations. These Sedimentation MCQ Questions Will help you to improve your Food Processing Unit Operations knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations.
Question 1
Which forces to separate particulate material from fluid streams?
A. solid
B. liquid
C. gas
D. gravitational
View Answer
Ans : D
Explanation: Sedimentation uses gravitational forces to separate particulate material from fluid streams
Question 2
The particles are usually
A. Solid
B. liquid
C. gas
D. All of the above
View Answer
Ans : D
Explanation: The particles are usually solid, but they can be small liquid droplets, and the fluid can be either a liquid or a gas.
Question 3
Particle diameters are usually?
A. medium
B. small
C. very small
D. large
View Answer
Ans : C
Explanation: Particle diameters are usually very small and are often measured in microns (micro-metres) = 10-6 m with the symbol um.
Question 4
Stoke's Law applies only in streamline flow and strictly only to spherical particles
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: Stoke's Law applies only in streamline flow and strictly only to spherical particles
Question 5
Cyclones are often used for the removal from air streams of particles of about 10 um or more diameter
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: Cyclones are often used for the removal from air streams of particles of about 10 mm or more diameter
Question 6
What are benefits of sedimentation?
A. Effective in removing viruses
B. Effective in removing fine particles
C. Effective in removing bacteria
D. Effective in removing yeast
View Answer
Ans : B
Explanation: Sedimentation is the process where by using coagulant the time required to settle out suspended solids is reduced and is very effective in removing fine particles.
Question 7
What is flotation?
A. Removal of fine particles by sedimentation
B. Removal of fine particles by air bubbles
C. Removal of fine particles by chelating agents
D. Removal of large particles by air bubbles
View Answer
Ans : B
Explanation: In some cases, where it is difficult to remove fine particles, therefore floatation equipment is used where these are floated to the surface with the help of air bubbles.
Question 8
Where does sedimentation value used?
A. Sugar
B. Chocolate
C. Salt
D. Bread
View Answer
Ans : D
Explanation: The sedimentation value is the degree of sedimentation of flour suspended in a lactic acid solution through a standard time interval and it is a measure of the baking quality.
Question 9
Which of the following food industry uses floatation equipment?
A. Sugar industry
B. Bakery industry
C. Oil industry
D. Salt industry
View Answer
Ans : C
Explanation: In the food industry, floatation is used in the separation of small particles of fat from water. The air dissolved in water under pressure produces the froth. When the pressure suddenly released, the air comes out of solution in the form of bubbles which rise and carry the fat with them to surface.
Question 10
Is soluble component be removed by using sedimentation?
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : B
Explanation: Sedimentation is the method of separating an insoluble substance from a liquid in which it is suspended by allowing it to settle to the bottom of the container normally by gravitational force.