Mechanical Operations Which of the follwoing mechanical conveyors does not come under the division 'scrapers'? Bucket elevators Drag conveyor Flight conveyor Ribbon conveyor Bucket elevators Drag conveyor Flight conveyor Ribbon conveyor ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced. Concentrate None of these Tailing Middling Concentrate None of these Tailing Middling 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)p (S/V)f (S/V)p (S/V)²p √(S/V)p (S/V)f (S/V)p (S/V)²p 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 = Vp/dp sp Φs = dp Sp/Vp Φs = 6 Vp/dp sp Φs = 6 dp Sp/Vp Φs = Vp/dp sp Φs = dp Sp/Vp Φs = 6 Vp/dp sp Φs = 6 dp Sp/Vp ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In closed circuit grinding as compared to open circuit grinding, the Operation is economical Production rate at a given limiting size is lower Specific surface of product is more Product has lesser size uniformity Operation is economical Production rate at a given limiting size is lower Specific surface of product is more Product has lesser size uniformity ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Wet grinding in a revolving mill __________ as compared to dry grinding. Requires more energy Complicates handling of the product Gives less wear on chamber walls Increases capacity Requires more energy Complicates handling of the product Gives less wear on chamber walls Increases capacity ANSWER DOWNLOAD EXAMIANS APP
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