Mechanical Operations Crushing efficiency is the ratio of the Energy fed to the machine to the surface energy created by crushing Energy absorbed by the solid to that fed to the machine Surface energy created by crushing to the energy absorbed by the solid Energy absorbed by the solid to the surface energy created by crushing Energy fed to the machine to the surface energy created by crushing Energy absorbed by the solid to that fed to the machine Surface energy created by crushing to the energy absorbed by the solid Energy absorbed by the solid to the surface energy created by crushing ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is the most suitable for cleaning of fine coal dust (<0.5 mm)? Froth floatation Spiral separator Trough washer Baum jig washer Froth floatation Spiral separator Trough washer Baum jig washer ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Work index is defined as the Gross energy (kWh/ton of feed) needed to reduce very large feed to such a size that 80% of the product passes through a 100 micron screen Energy needed to crush one tonne of feed to 200 microns Energy needed to crush one ton of feed to 100 microns Energy (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product passes a 200 mesh screen Gross energy (kWh/ton of feed) needed to reduce very large feed to such a size that 80% of the product passes through a 100 micron screen Energy needed to crush one tonne of feed to 200 microns Energy needed to crush one ton of feed to 100 microns Energy (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product passes a 200 mesh screen ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The specific cake resistance for compressible sludges is a function of the pressure drop None of these Overall Over cake Over medium None of these Overall Over cake Over medium ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration At the end of filtration, but decreases with time subsequently At time zero When half the filtrate has been obtained At the end of filtration At the end of filtration, but decreases with time subsequently At time zero When half the filtrate has been obtained At the end of filtration ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A compressible cake has the Maximum porosity at the upstream side None of these Same porosity throughout the cake thickness Maximum porosity at the filter medium Maximum porosity at the upstream side None of these Same porosity throughout the cake thickness Maximum porosity at the filter medium ANSWER DOWNLOAD EXAMIANS APP
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