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 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) Wet grinding in high viscous suspension Dry grindng of large particles in un-baffed mills ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations All resistances during washing of cake Remain constant Increases None of these Decreases Remain constant Increases None of these Decreases ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Sphericity of raschig ring (whose length and diameter are equal) is 1 >1 2 1 >1 2 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following can be most effectively used for clarification of lube oil and printing ink? Disc-bowl centrifuge Precoat filter Sparkler filter Sharpies supercentrifuge Disc-bowl centrifuge Precoat filter Sparkler filter Sharpies supercentrifuge ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Cartridge filters are termed as 'edge' filters, because of the fact that the Bulk of the solids are removed at the periphery of the disks Disks have very sharp edge None of these Solids are not deposited at the edge of the disk Bulk of the solids are removed at the periphery of the disks Disks have very sharp edge None of these Solids are not deposited at the edge of the disk ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Grinding characteristic of a material is given by its HGI Abrasion index Shatter index Angle of repose HGI Abrasion index Shatter index Angle of repose ANSWER DOWNLOAD EXAMIANS APP
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