MCQs on Size Separation.

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MCQs: Size Separation.

Quiz

Time for this test is 45 minutes.

 

1. A pharmaceutical process by which the particles of different sizes are separated from a mixture is called ----.
   1.   Size Reduction.
   2.   Size Separation.
   3.   Distillation.
   4.   Filtration.
2. Size Separation is also called,
   1.   Sifting.
   2.   Classifying.
   3.   Screening.
   4.   Sieving.
   5.   All of these.
3. Size separation is a good tool for testing the efficiency of a size reduction equipment or process.
   1.   True.
   2.   False.
4. A powder, all the particles of which pass through a SieveNo. 10 and not more than 40% pass through Sieve No. 44 is called a ---.
   1.   Coarse Powder.
   2.   Moderately Coarse Powder.
   3.   Moderately Fine Powder.
   4.   Fine Powder.
   5.   Very Fine Powder.
5. A powder, all the particles of which pass through a SieveNo. 22 and not more than 40% pass through Sieve No. 60 is called a -----.
   1.   Coarse Powder.
   2.   Moderately Coarse Powder.
   3.   Moderately Fine Powder.
   4.   Fine Powder.
   5.   Very Fine Powder.
6. A powder, all the particles of which pass through a SieveNo. 44 and not more than 40% pass through Sieve No. 85 is called a ----.
   1.   Coarse Powder.
   2.   Moderately Coarse Powder.
   3.   Moderately Fine Powder.
   4.   Fine Powder.
   5.   Very Fine Powder.
7. A powder, all the particles of which pass through a SieveNo. 85 is called a ----.
   1.   Coarse Powder.
   2.   Moderately Coarse Powder.
   3.   Moderately Fine Powder.
   4.   Fine Powder.
   5.   Very Fine Powder.
8. A powder, all the particles of which pass through a SieveNo. 120 is called a ----.
   1.   Coarse Powder.
   2.   Moderately Coarse Powder.
   3.   Moderately Fine Powder.
   4.   Fine Powder.
   5.   Very Fine Powder.
9. Most simple and most frequently used method for size separation is. -----
   1.   Sieve Shaker.
   2.   Cyclone Air Separator.
   3.   Air Separator.
   4.   Elutriation.
10. What is a “Sieve Number”?
    1.   This is the number of meshes in a length of 25.4mm.
    2.   This is the distance between the wires, so that it represents the length of the side of the square aperture.
    3.   Nominal diameter of the wire.
    4.   This is the number of meshes in a length of 1 inch.
11. What is a “Nominal size aperture”?
    1.   This is the number of meshes in a length of 25.4mm.
    2.   This is the distance between the wires, so that it represents the length of the side of the square aperture.
    3.   Nominal diameter of the wire.
    4.   This is the number of meshes in a length of 1 inch.
12. Which of the following is not a mechanism for Size Separation?
    1.   Oscillation
    2.   Vibration
    3.   Gyration
    4.   Cutting
13. The principal behind the working of Mechanical Sieve Shaker is ----
    1.   Oscillation and Vibration.
    2.   Gyration & Oscillation.
    3.   Vibration and Gyration.
    4.   Centrifugal Force.
14. One of the major disadvantages of the Mechanical Sieve Shaker is -----.
    1.   Generation of fines due to attrition.
    2.   Clogging may happen if powder is not sufficiently dried.
    3.   Only B is right.
    4.   Both A & B are right.
15. Household vacuum cleaner is a simple version of,
    1.   Cyclone Separator.
    2.   Air Separator.
    3.   Bag Filter.
    4.   Elutriator.
16. Which method is commonly used for size separation from a Suspension?
    1.   Mechanical Sieve Shaker.
    2.   Air Separator.
    3.   Bag FIlter.
    4.   Elutriation.