Mechanical Operations Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator? Cresylic acid Sodium carbonate Copper sulphate Calcium carbonate Cresylic acid Sodium carbonate Copper sulphate Calcium carbonate ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is 0.6 0.4 0.1 None of these 0.6 0.4 0.1 None of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For spheres, volume shape factor is given by π(=A/D²) 2π(=2A/D²) π/6(=V/D³) AD/V π(=A/D²) 2π(=2A/D²) π/6(=V/D³) AD/V ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the Sedimentation Dispersion Flocculation Centrifugation Sedimentation Dispersion Flocculation Centrifugation ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the Filtration time only Washing time only Square of the viscosity Square root of the velocity Filtration time only Washing time only Square of the viscosity Square root of the velocity ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond's law, Rittinger's law and Kick's law) depend upon the Both A & B Neither A nor B Feed material Type of crushing machine Both A & B Neither A nor B Feed material Type of crushing machine ANSWER DOWNLOAD EXAMIANS APP
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