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. 0.014 0.007 0.3 50 0.014 0.007 0.3 50 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Colloidal mills are used for __________ grinding. Intermediate Ultrafine Coarse Fine Intermediate Ultrafine Coarse Fine 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 Froth floatation Clarification Thickening Classification Froth floatation Clarification Thickening Classification 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)²p (S/V)f (S/V)p √(S/V)p (S/V)²p (S/V)f (S/V)p √(S/V)p ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are Silicates & phosphates Carbonates Bi-carbonates Sulphates Silicates & phosphates Carbonates Bi-carbonates Sulphates ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Introduction of slurry in a plate and frame filter press is done through a plate in each frame. The plate of this filter has a __________ surface. Plane Ribbed Curved Either A or B Plane Ribbed Curved Either A or B ANSWER DOWNLOAD EXAMIANS APP
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