21. A fluid energy mill is used for
22. A __________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream.
23. The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the
24. The specific cake resistance for compressible sludges is a function of the pressure drop
25. __________ balls capable of grinding the feed in a ball mill gives the maximum efficiency.
26. The inlet pressure in a constant rate filtration
27. The ratio of the area of openings in one screen (Taylor series) to that of the openings in the next smaller screen is
28. Crushing of mineral particles is accomplished in a 'cage mill', when one or more alloy steel bars are revolved in opposite directions. It is a type of __________ mill.
29. The controlling resistance in a rotary drum vacuum filter is the __________ resistance.
30. Shape factor for a cylinder whose length equals its diameter is
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