Mechanical Operations Work index is defined as the Energy needed to crush one ton of feed to 100 microns 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 (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product passes a 200 mesh screen Energy needed to crush one tonne of feed to 200 microns Energy needed to crush one ton of feed to 100 microns 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 (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product passes a 200 mesh screen Energy needed to crush one tonne of feed to 200 microns ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A propeller agitator Produces mainly axial flow All of these Runs at very slow speed (2 rpm) Is used for mixing high viscosity pastes Produces mainly axial flow All of these Runs at very slow speed (2 rpm) Is used for mixing high viscosity pastes ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Traces of solids are removed from, liquid in a Classifier Clarifier Rotary vacuum filter Sparkler filter Classifier Clarifier Rotary vacuum filter Sparkler filter ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The speed of a rotary drum vacuum filter may be about __________ rpm. 500 1 100 50 500 1 100 50 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For spheres, volume shape factor is given by 2π(=2A/D²) π/6(=V/D³) π(=A/D²) AD/V 2π(=2A/D²) π/6(=V/D³) π(=A/D²) AD/V ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The most common filter aid is Calcium silicate Diatomaceous earth Silica gel Sodium carbonate Calcium silicate Diatomaceous earth Silica gel Sodium carbonate ANSWER DOWNLOAD EXAMIANS APP
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