Mechanical Operations If radius of a batch basket centrifuge is halved & the r.p.m. is doubled, then the Linear speed of the basket is halved Centrifugal force is doubled Linear speed of the basket is doubled Capacity of centrifuge is increased Linear speed of the basket is halved Centrifugal force is doubled Linear speed of the basket is doubled Capacity of centrifuge is increased 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 None of these 0.1 0.4 0.6 None of these 0.1 0.4 ANSWER DOWNLOAD EXAMIANS APP
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? Sodium carbonate Copper sulphate Calcium carbonate Cresylic acid Sodium carbonate Copper sulphate Calcium carbonate Cresylic acid ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In closed circuit grinding as compared to open circuit grinding, the Production rate at a given limiting size is lower Product has lesser size uniformity Specific surface of product is more Operation is economical Production rate at a given limiting size is lower Product has lesser size uniformity Specific surface of product is more Operation is economical ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Pine oil used in froth floatation technique acts as a/an Modifier Collector Activator Frother Modifier Collector Activator Frother ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate) All of these 1/μ 1/R S All of these 1/μ 1/R S ANSWER DOWNLOAD EXAMIANS APP
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