SIZE SEPRATION
TOP 5 MCQ
1. According to IP and BP, very fine powder is one in which: [GPAT-2023 SHIFT-I]
(a) All particles pass through 120# sieve
(b) 90% particles pass through 350# sieve
(c) All particles pass through 350# sieve
(d) 90% particles are of size < 10 µm
2. Which among the following variables is not a reason for errors during particle size analysis by sieving method? [GPAT-2013]
(a) Sieve loading
(b) Intensity of agitation
(c) Duration of agitation
(d) Size of the particles
3. Speed disk atomizer rotates at a speed of: [GPAT-2012]
(a) 3000–5000 revolutions per minute
(b) 3000–50000 revolutions per minute
(c) 300–5000 revolutions per minute
(d) 300–5000 revolutions per minute
4. The area of clear opening of any two successive sieves according to Tyler Standard is in the ratio of: [GPAT-2011]
(a) 1 : 4
(b) 1 : 6
(c) 1 : 2
(d) 1 : 3
5. Which of the following aids in size separation of sieve shaker machine?
(a) Agitation
(b) Brushing
(c) Centrifugal force
(d) Shearing force
ANSWER KEY
| 1-a | 2-d | 3-b | 4-c | 5-a |
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