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Toggle Filter আইকনটি-i. Remove filter হিসেবে কাজ করেii. Undo filter হিসেবে কাজ করে iii. Apply filter হিসেবে কাজ করেনিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
The most common filter aid is
A Diatomaceous earth
B Calcium silicate
C Sodium carbonate
D Silica gel
Filter aid is used to
A Increase the rate of filtration
B Decrease the pressure drop
C Increase the porosity of the cake
D Act as a support base for the septum
Which of the following is not used as filter aid?
A Asbestos
B Diatomaceous earth
C Purified wood cellulose
D Rice husk
The most suitable filter for the removal of very small amount of precipitate from very large volumes of water is the __________ filter.
A Vacuum
B Sand
C Plate & frame
D Rotary
For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the __________ filter.
A Plate & frame
B Shell & leaf
C Sand
D Rotary vacuum
In filtration, the use of 'filter aid' helps in
A Reducing the filtration pressure
B Accelerating the rate of filtration
C Deplugging the filter medium
D Enhancing the cake porosity in case of a dense impermeable cake
Addition of filter aid to the slurry before filtration is done to ...... of the cake.
A Increase the porosity
B Increase the compressibility co-efficient
C Decrease the porosity
D Decrease the compressibility co-efficient
Which one is a filter aid?
A Convas fabric
B Diatomaceous earth
C Calcined lime
D None of these
The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.
A Rapid sand
B Pressure
C Gravity
D Slow sand

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