Where the density difference of the two liquid phase to be separated is very small (as in milk cream separator), the most suitable separator is a____________________?

Related Mcqs:

1. For sizing of fine materials, the most suitable equipment is a____________________?

   A. Trommel
   B. Grizzly
   C. Shaking screen
   D. Vibrating screen

2. A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is ___________________?

   A. ½w2 . R2 . ρL
   B. ½w2 . δ2 . ρL
   C. ½w2 . δρL (2R + δ)
   D. ½w2 . R . ρL(R + 2δ)

3. In the cyclone separator used for separation of dust from dust laden gas, the gas ?

   A. Enters the cyclone from the top
   B. Is admitted tangentially at high velocity
   C. Develops a helical motion inside the chamber
   D. Both B. and C.

4. Traces of liquid tar fog present in coke oven gas is separated using____________________?

   A. Electrostatic precipitator
   B. Cyclone separator
   C. Strainer
   D. None of these

5. For the preliminary breaking of hard rock, we use a____________________?

   A. Gyratory crusher
   B. Ball mill
   C. Tube mill
   D. Squirrel-cage disintegrator

6. Dust laden air can be purified using a____________________?

   A. Cyclone separator
   B. Bag filter
   C. Gravity settler
   D. Tubular centrifuge

7. Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid ?

   A. Sand bed filter
   B. Plate and frame filter press
   C. Vacuum filter
   D. Batch basket centrifuge

8. Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter) ?

   A. 0.5 D
   B. D
   C. 1.5 D
   D. 2 D

9. Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the___________________?

   A. Coagulation
   B. Flocculation
   C. Sedimentation
   D. Clarification

10. Solid particles of different densities are separated by _____________________?

    A. Filters
    B. Thickness
    C. Cyclones
    D. Sorting classifier