For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter D. as_________________?

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In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the ________________ crushing?

A. Secondary B. Fine C. Primary D. Ultrafine...

Pick out the wrong statement ?

A. More commonly used jaw crusher between Dodge jaw crusher and Blake jaw crusher is the later one B. There are only four methods namely compression, impact, attrition and cutting, which the size reduction equipments employ C. Cutting machines mainly employ ‘attrition’ for size reduction of solids D. Operating principles of Dodge and Blake jaw … Pick out the wrong statement ?Read More...

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

A. Toothed roll crusher B. Gyratory crusher C. Ball mill D. Tube mill...

If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the __________________?

A. Sedimentation B. Flocculation C. Dispersion D. Centrifugation...

Addition of filter aid to the slurry before filtration is done to _______________ of the cake?

A. Increase the porosity B. Increase the compressibility co-efficient C. Decrease the porosity D. Decrease the compressibility co-efficient...