WorksheetsKMK30203 Quiz: Lecture 8
Total questions: 10
Worksheet time: 5mins
Which of the following is NOT an example of mechanical separations?
Membrane filtration
Centrifugal sedimentation
Cake filtration
Centrifugal filtration
Which of the following does NOT affect the separation mechanism for mechanical separation?
Physical properties of the particles
thermodynamic factors
Sedimentation rates
Which of the following uses centrifugal force as the driving force for the separation process?
Discontinuous gravity filtration
Discontinuous pressure filtration
Continuous centrifugal filtration
Continuous vacuum filtration
Which of the following is TRUE for centrifugal filtration?
Uses centrifugal force acting on the fluid as the driving force
Lower cost is needed to stabilize the spinning equipment at high speed
Generally used in separating finer particles (10 microns to 10 millimetres)
Do not need a filter medium as other filtration process does
Which of the following separation process has lower pressure at the filtrate side?
Vacuum filtration
Pressure filtration
Membrane filtration
Centrifugal filtration
Which of the following household item was used as an example for centrifugal filtration?
Television
Washing machine
Water boiler
Juicer
Which of the following is NOT the reason for difficult centrifugal filtration prediction?
Changing area of flow with distance from the rotation axis
Changing rate of the centrifugal driving force with distance from the rotation axis
The drastic change in specific cake resistance
The drastic change in filter medium resistance
Which of the following is NOT the assumption made when predicting the centrifugal filtration rate?
The cake formed on the filter medium is compressible
The filtration occurs at the laminar flow region
The cake formed is thin enough as compared with the large centrifuge diameter
The surface area for the flow is assumed constant
What is the value for the surface area (A) in m2 in the worked example in Lecture 8? (correct to 4 decimal places)
(a)
Which of the following is an example of the continuous centrifuges filter?
Top-suspended centrifuge
Basket centrifuge
Pusher centrifuge
Screw press
