_____________ is the most commonly used ‘filter aid’?

Related Mcqs:

1. 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.

2. 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

3. Which of the following is not used as filter aid ?

   A. Asbestos
   B. Diatomaceous earth
   C. Purified wood cellulose
   D. Rice husk

4. Which one is a filter aid ?

   A. Canvas fabric
   B. Diatomaceous earth
   C. Calcined lime
   D. None of these

5. 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

6. The most common filter aid is_________________?

   A. Diatomaceous earth
   B. Calcium silicate
   C. Sodium carbonate
   D. Silica gel

7. 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

8. 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

9. 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

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