31. Vertical transportation of materials can be done by a/an
32. Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity?
33. Fluid energy mill comes in the category of
34. __________ mill is not a revolving mill.
35. Which of the following is not a revolving/tumbling mill used for size reduction?
36. __________ centrifuge is normally used in sugar mills.
37. Grinding characteristic of a material is given by its
38. Which of the following is the most suitable for cleaning of fine coal dust (<0.5 mm)?
39. Which of the following can be most effectively used for clarification of lube oil and printing ink?
40. Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm)
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