Mechanical Operations Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of __________ mm. 0.3 50 0.007 0.014 0.3 50 0.007 0.014 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 None of these 0.1 0.6 0.4 None of these 0.1 0.6 0.4 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A tube mill as compared to a ball mill Employs smaller balls Gives finer size reduction but consumes more power Has larger length/diameter ratio (>2 as compared to 1 for ball mill) All of these Employs smaller balls Gives finer size reduction but consumes more power Has larger length/diameter ratio (>2 as compared to 1 for ball mill) All of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is Φs is defined by Φs = 6 dp Sp/Vp Φs = Vp/dp sp Φs = 6 Vp/dp sp Φs = dp Sp/Vp Φs = 6 dp Sp/Vp Φs = Vp/dp sp Φs = 6 Vp/dp sp Φs = dp Sp/Vp ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations __________ baffles are provided in ball mills. Only two None of these No Horizontal Only two None of these No Horizontal ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Mass flow of granular solid (M) through a circular opening of dia, D follows M ∝ D² M ∝ D³ M ∝ D M ∝ √D M ∝ D² M ∝ D³ M ∝ D M ∝ √D ANSWER DOWNLOAD EXAMIANS APP
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