Mechanical Operations In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced. Middling Tailing None of these Concentrate Middling Tailing None of these Concentrate ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Crushing efficiency is the ratio of the Energy absorbed by the solid to the surface energy created by crushing Energy fed to the machine to the surface energy created by crushing Surface energy created by crushing to the energy absorbed by the solid Energy absorbed by the solid to that fed to the machine Energy absorbed by the solid to the surface energy created by crushing Energy fed to the machine to the surface energy created by crushing Surface energy created by crushing to the energy absorbed by the solid Energy absorbed by the solid to that fed to the machine ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls? 1 0.66 0.5 2.76 1 0.66 0.5 2.76 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Driving force in case of filtration by a centrifuge is the Formation of highly porous cake Narrow diameter of the vessel Speed of the centrifuge Centrifugal pressure exerted by the liquid Formation of highly porous cake Narrow diameter of the vessel Speed of the centrifuge Centrifugal pressure exerted by the liquid ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Where the density difference of the two liquid phase to be separated is very small (as in milk cream separator), the most suitable separator is a Batch basket centrifuge Disc bowl centrifuge Sparkler filter Sharpies supercentrifuge Batch basket centrifuge Disc bowl centrifuge Sparkler filter Sharpies supercentrifuge ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The value of 'angle of nip' is generally about 16° 52° 32° 64° 16° 52° 32° 64° ANSWER DOWNLOAD EXAMIANS APP
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