Q. Ultra centrifuges are used for the separation of __________ solid particles.

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Q. Specific surface area is the surface area of a unit __________ of materials.

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Q. A. __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end.

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Q. The constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond's law, Rittinger's law and Kick's law) depend upon the

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Q. __________ balls capable of grinding the feed in a ball mill gives the maximum efficiency.

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Q. The speed of a rotary drum vacuum filter may be about __________ rpm.

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Q. Colloid mills achieve size reduction mainly by

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Q. Mesh indicates the number of holes per

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Q. For achieving maximum capacity of the ball mill, the ball charge should be equal to about __________ percent of the ball mill volume.

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Q. The unit of specific cake resistance is

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Q. Size reduction of asbestos and mica is done by

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Q. A pebble mill

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Q. The study on washability of coal is done by using the __________ technique.

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Q. Horsepower required for a roll crusher is directly proportional to its

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Q. A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is

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Q. __________ conveyor is the most suitable for long distance transportation of cold, non-abrasive granular/irregular shape/fine materials.

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Q. The specific cake resistance for compressible sludges is a function of the pressure drop

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Q. Moisture can be removed from lubricating oil using

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Q. Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about

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Q. Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately ?

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