121. Toothed roll crushers achieve size reduction by
122. Colloid mills achieve size reduction mainly by
123. Solid particles separation based on the difference in their flow velocities through fluids is termed as the
124. Soft & non-abrasive materials can be made into fines by
125. Which of the following terminology is not used for size reduction of materials to fine sizes or powders?
126. Fibrous material is broken by a
127. Mesh indicates the number of holes per
128. Jigging is a technique by which different particles can be
129. Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation.
130. Pick out the correct statement.
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