31. Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles)
32. To get ultrafine particles, the equipment used is a
33. A tube mill as compared to a ball mill
34. Tank filter (e.g., Nutsch filter) is
35. Vacuum filter is most suitable for the
36. In case of a ball mill,
37. In case of a hammer crusher,
38. Which of the following is not used as a filter medium in case of corrosive liquids?
39. Which of the following is not used as filter aid?
40. __________ is the most suitable for compounding rubber and plastic solids.
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