Mechanical Operations Reduction ratio of crushers is the Ratio of feed opening to discharge opening None of these Ratio of discharge opening to feed opening Determining factor for minimum dia of the feed and the product Ratio of feed opening to discharge opening None of these Ratio of discharge opening to feed opening Determining factor for minimum dia of the feed and the product ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed? Wet grinding in high viscous suspension Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension Dry grinding of large particles (upto 1.25 cms) Wet grinding in high viscous suspension Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension Dry grinding of large particles (upto 1.25 cms) ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The reduction ratio for grinders is defined as(where, Df and Dp are average diameters of feed and product respectively). Df - Dp None of these Dp/Df Df/Dp Df - Dp None of these Dp/Df Df/Dp ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to The change in volume due to crushing The size reduction ratio None of these The new surface created The change in volume due to crushing The size reduction ratio None of these The new surface created ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations __________ are used for the separation of coarse particles from a slurry of fine particles. Hydrocyclones Classifiers Thickeners Decanters Hydrocyclones Classifiers Thickeners Decanters ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called Thickening Froth floatation Classification Clarification Thickening Froth floatation Classification Clarification ANSWER DOWNLOAD EXAMIANS APP
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