Mechanical Operations Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills. Metalliferrous ores Non-metallic ores Basic slags Asbestos & mica Metalliferrous ores Non-metallic ores Basic slags Asbestos & mica ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is Precoated on the filter medium prior to filtration All of these Added to the feed slurry Separated from the cake by dissolving solids or by burning it off Precoated on the filter medium prior to filtration All of these Added to the feed slurry Separated from the cake by dissolving solids or by burning it off ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A 30% (by volume) suspension of spherical sand particles in a viscous oil has a hindered settling velocity of 4.44 μm/s. If the Richardson Zaki hindered settling index is 4.5, then the terminal velocity of a sand grain is 0.02 μm/s 0.90 μm/s 22.1 μm/s 1 μm/s 0.02 μm/s 0.90 μm/s 22.1 μm/s 1 μm/s ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Shell and leaf filter as compared to plate and frame filter Entails less labor cost Facilitates filtration under higher pressure All of these Provides more effective washing Entails less labor cost Facilitates filtration under higher pressure All of these Provides more effective washing ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations As particle size is reduced Screening becomes progressively easier Screening becomes progressively more difficult None of these Capacity and effectiveness of the screen is increased Screening becomes progressively easier Screening becomes progressively more difficult None of these Capacity and effectiveness of the screen is increased ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Rod mills employed for grinding Employ steel rods of 2-12 cms diameter extending over full length of the mill Employ a steel shell having L/D ratio of 1.5 to 3.0 All of these Is useful for handling sticky materials Employ steel rods of 2-12 cms diameter extending over full length of the mill Employ a steel shell having L/D ratio of 1.5 to 3.0 All of these Is useful for handling sticky materials ANSWER DOWNLOAD EXAMIANS APP
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