Q. For efficient grinding, ball mills must be operated

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Q. In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of __________ crushing.

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Q. For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter)

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Q. The reduction ratio for grinders is defined as(where, Df and Dp are average diameters of feed and product respectively).

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Q. Pick out the wrong statement pertaining to the turbine agitator.

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Q. A fluid energy mill is used for

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Q. Which of the following is the softest material ?

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Q. Dry powdery solid materials are transported by a __________ conveyor.

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Q. Fluid energy mill comes in the category of

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Q. Filtration capacity of a rotary drum vacuum filter depends upon the

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Q. Optimum ratio of operating speed to critical speed of a trommel is

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Q. The process opposite to 'dispersion' is termed as the

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Q. The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration.

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Q. Grinding efficiency of a ball mill is of the order of __________ percent.

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Q. Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate)

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Q. Which one is a filter aid ?

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Q. To remove dirt from the flowing fluid, we use a

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Q. Which of the following crushers can be considered as a combination of a jaw crusher and a roller crusher ?

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Q. In a roll crusher, both the rolls

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Q. Tube mill compared to ball mill

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