1) Size separation is NOT based on one of the following properties a) Particle density b) Particle Shape c) Particle size d) Particle texture 2) Which one of the following indicates the nominal size of aperture? a) Area of mesh as percentage b) Distance between two adjacent wires c) Number of meshes per linear length d) Wire having specified diameter that gives suitable aperture 3) During size separation, the movement of particles can be enhanced by one of the following modes. a) Agitation b) Attrition c) Gravitation d) Mixing 4) Fluid energy mill is also known as__________ a) Micronizers b) Jet mill c) Pulverizers d) All of the above 5) End runner mill works on the principle of ___________ a) Crushing and friction b) Cutting and attrition c) Crushing and shearing d) Crushing and grinding 6) Cutter mill is fitted with__________ knives. a) Stationary b) Rotating c) Both A and B d) Other than above 7) This mill do not have any moving part in the grinding area: a) Disintegrator mill b) Hammer mill c) Colloid mill d) Fluid energy mill 8) Fluid energy mill reduces the particles upto___________ a) 8 micron or less b) 6 micron or less c) 5 micron or less d) 3 micron or less 9) The process of levigation is known as: a) Wet crushing b) Shearing c) Wet grinding d) Both A and B 10) Which of the following mill works on the principle of combined impact and attrition? a) Hammer mill b) Ball mill c) Disintegrator mill d) Roller mill 11) Which of the following is an impact mechanism mill? a) Cutter mill b) Hammer mill c) Ball mill d) Fluid energy mill 12) Fluid energy mill works on the principle of: a) Impact b) Attrition c) Cutting d) Impact and attrition combined 13) In Ball mill, how much volume should be occupied by material a) 10-30% b) 5-20% c) 50-70% d) 30-50% 14) Which of following mill is free from wear? a) Ball mill b) Roller mill c) Edge runner mill d) Fluid energy mill 15) The output of size reduction of material in a machine depends on: a) Chemical nature b) Physical characteristics c) Bulk density d) All of the above

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