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 0.90 μm/s 0.02 μm/s 1 μm/s 22.1 μm/s 0.90 μm/s 0.02 μm/s 1 μm/s 22.1 μm/s ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The process by which fine solids is removed from liquids is termed as Decantation Flocculation Sedimentation Classification Decantation Flocculation Sedimentation Classification ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following terminology is not used for size reduction of materials to fine sizes or powders? Pulverisation Compression Dispersion Comminution Pulverisation Compression Dispersion Comminution ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In case of a hammer crusher, Crushing takes place by impact breaking All of these Maximum acceptable feed size is 30 cms Reduction ratio can be varied by adjusting the distance from cage to hammers Crushing takes place by impact breaking All of these Maximum acceptable feed size is 30 cms Reduction ratio can be varied by adjusting the distance from cage to hammers ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter) D 2 D 1.5 D 0.5 D D 2 D 1.5 D 0.5 D ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called Thickening Froth floatation Clarification Classification Thickening Froth floatation Clarification Classification ANSWER DOWNLOAD EXAMIANS APP
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