Q. The operating speed of a ball mill should be __________ the critical speed.

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Q. Use of baffles in agitators help in minimising the __________ tendency.

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Q. __________ are used for the separation of coarse particles from a slurry of fine particles.

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Q. Fibrous material is broken by a

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Q. __________ is the most suitable for compounding rubber and plastic solids.

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Q. The controlling resistance in a rotary drum vacuum filter is the __________ resistance.

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Q. Which of the following is used for primary crushing of very hard lumpy materials ?

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Q. Coal is finally pulverised to 200 mesh size for burning in boilers by a

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Q. Crushing efficiency is the ratio of the

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Q. The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size )

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Q. __________ mixer is used for devulcanisation of rubber scrap & making water dispersion & rubber solution.

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Q. Which of the following mechanical conveyors does not come under the division 'carriers' ?

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Q. Screen capacity is not a function of

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Q. Which of the following is a vacuum filter ?

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Q. Pine oil used in froth floatation technique acts as a/an

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Q. Cement clinker is reduced to fine size by a

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Q. The crushed material received for separation is called feed or

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Q. For spheres, volume shape factor is given by

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Q. Which of the following agitators having a large blade area, rotating at slow speed is used for mixing high viscosity liquids ( > 50000 centipoise) ?

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Q. __________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals.

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