Mechanical Operations Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) M . Vp/ρ M . ρ/Vp Vp/m . ρ M/ρ . Vp M . Vp/ρ M . ρ/Vp Vp/m . ρ M/ρ . Vp ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations With increase in the capacity of screens, the screen effectiveness Decreases exponentially Decreases Remains unchanged Increases Decreases exponentially Decreases Remains unchanged Increases ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations According to Bond crushing law, the work required to form particle of size 'D' from very large feed is (where (S/V)p and (S/V)f are surface to volume ratio of the product and feed respectively). (S/V)f (S/V)²p √(S/V)p (S/V)p (S/V)f (S/V)²p √(S/V)p (S/V)p ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In closed circuit grinding as compared to open circuit grinding, the 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 Production rate at a given limiting size is lower Product has lesser size uniformity ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A __________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream. Strainer Thickener Clarifier Classifier Strainer Thickener Clarifier Classifier ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The operating speed of a ball mill should be __________ the critical speed. Slightly more than Less than Much more than At least equal to Slightly more than Less than Much more than At least equal to ANSWER DOWNLOAD EXAMIANS APP
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