In bag filters, filter fabrics are never made of__________________?

Related Mcqs:

1. The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?

   A. c/s
   B. s/c
   C. s . c
   D. 1/s . c

2. Cartridge filters are termed as ‘edge’ filters, because of the fact that the_________________?

   A. Disks have very sharp edge
   B. Solids are not deposited at the edge of the disk
   C. Bulk of the solids are removed at the periphery of the disks
   D. None of these

3. Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is_______________?

   A. Added to the feed slurry
   B. Pre-coated on the filter medium prior to filtration
   C. Separated from the cake by dissolving solids or by burning it off
   D. All A, B. & C.

4. Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to ____________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance)?

   A. √μ
   B. 1/√μ
   C. 1/μ
   D. 1/μ2

5. 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

6. Shell and leaf filter as compared to plate and frame filter _____________________?

   A. Entails less labor cost
   B. Facilitates filtration under higher pressure
   C. Provides more effective washing
   D. All A., B. & C.

7. Introduction of slurry in a plate and frame filter press is done through a plate in each frame. The plate of this filter has a _______________ surface?

   A. Plane
   B. Curved
   C. Ribbed
   D. Either A. or B.

8. Moore filter is a ______________ filter ?

   A. Leaf
   B. Press
   C. Rotary
   D. Sand

9. 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

10. Tank filter (e.g., Nutsche filter) is___________________?

    A. A high pressure filter
    B. A continuous filter
    C. Used for small scale filtration work
    D. A leaf filter