Mechanical Operations In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the __________ crushing. Primary Secondary Fine Ultrafine Primary Secondary Fine Ultrafine ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Crushing of mineral particles is accomplished in a 'cage mill', when one or more alloy steel bars are revolved in opposite directions. It is a type of __________ mill. None of these Vibratory Roll Impact None of these Vibratory Roll Impact ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of Concrete Bronze Flint or porcelain Stainless steel Concrete Bronze Flint or porcelain Stainless steel ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter) AD/V None of these π/6(=V/D³) π(=A/D²) AD/V None of these π/6(=V/D³) π(=A/D²) ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The mechanism of size reduction by a hammer mill is by impact and attrition between the Both A & B Feed particles Neither A nor B Grinding element & the housing Both A & B Feed particles Neither A nor B Grinding element & the housing ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In case of a hammer crusher, the Minimum product size is 3 mm Feed may be highly abrasive (Moh's scale >5) Maximum feed size may be 50 mm Rotor shaft carrying hammers can be vertical or horizontal Minimum product size is 3 mm Feed may be highly abrasive (Moh's scale >5) Maximum feed size may be 50 mm Rotor shaft carrying hammers can be vertical or horizontal ANSWER DOWNLOAD EXAMIANS APP
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