This set of Bioseparation Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Mode of Operation of Filtration – Set 2”.
1. The thickening of slurry can be achieved by _____________
a) mechanical devices
b) electrical devices
c) magnetic devices
d) robot
View Answer
Explanation: The thickening of slurry can be achieved by using mechanical devices. The mechanical device used for the process includes moving blades.
2. What is the purpose of moving blades in the process of filtration?
a) Keeps the cake in position
b) Keeps the cake away from the filter medium
c) Scrape the cake continuously
d) No use in the process of filtration
View Answer
Explanation: The moving blades continuously scrape of the cake from the filter surface. The scraping is important because it will help in removing the cake continuously so that the process of continuous.
3. Which type of filtration depends on the moving blade arrangement?
a) Cross flow
b) Delayed
c) Batch
d) Continuous
View Answer
Explanation: The delayed cake filtration works on the basis of moving blade arrangement and with the arrangement of the blade the thickness of the cake is being limited and limited is caused by the clearance among the blade and the filter medium.
4. Slurry concentration by delayed cake filtration can be carried out until __________
a) slurry does not flow
b) slurry flows
c) slurry remains in the filter bed
d) no filtration
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Explanation: Slurry concentration by delayed cake filtration can be carried out for the process of filtration until the content that are solid on the feed side of the filter bed reaches a critical level beyond that the slurry does not flow.
5. What is the alternative way to delayed cake filtration method?
a) Batch mode
b) Continuous mode
c) Slurry concentration
d) Cross flow filtration
View Answer
Explanation: The alternative method to delayed cake filtration is cross flow filtration in which the cake build up on the filter can be discouraged and it can be done by using a cross-flow mode of operation.
6. The cross flow filtration is achieved by __________
a) low velocity
b) high velocity
c) very high velocity
d) very low velocity
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Explanation: The cross flow filtration in the slurry concentration can be achieved by the maintaining of the feed flow at a very high velocity which is kept parallel to the surface of the filter medium.
7. The cross flow filtration cannot be used for __________
a) obtaining very thin slurry
b) very thick slurry
c) thick slurry
d) thin slurry
View Answer
Explanation: The cross flow filtration cannot be used for obtaining a very thick slurry because the energy essential for preserving the cross-flow velocity becomes excessively high.
8. The cake after the formation contains __________
a) entrapped liquid
b) entrapped solid
c) waste material
d) feed
View Answer
Explanation: The cake after the formation contains the huge excessive amount of the entrapped liquid and when the product of interest is liquid then the entrapment shows the loss of yield.
9. If the cake is itself the product, what is the fate of the liquid?
a) Slurry
b) Product
c) Impurity
d) Yield
View Answer
Explanation: If the cake is itself the product then the entrapped liquid is considered as the impurity in the product and the impurity in the form of liquid can be removed by washing the cake.
10. What is the fate of the product, if the product is soluble in the washing liquid?
a) Depends on Washing process
b) Depends on the impurity
c) Depends on the yield
d) Depends on the liquid
View Answer
Explanation: If the product is soluble in the washing liquid then the product fate depends on the duration of the washing process of the cake, based on the trade-off between the amount lost and the desired purity.
Sanfoundry Global Education & Learning Series – Bioseparation Engineering.
To practice all areas of Bioseparation Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.
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