Mechanical Operations General mechanism of size reduction in intermediate and fine grinder is by Compression Compression and tearing Impact and attrition Cutting action Compression Compression and tearing Impact and attrition Cutting action ANSWER DOWNLOAD EXAMIANS APP
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. Fine Ultrafine Primary Secondary Fine Ultrafine Primary Secondary 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 Bronze Stainless steel Flint or porcelain Concrete Bronze Stainless steel Flint or porcelain Concrete ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Screw conveyors are Suitable for highly abrasive materials Run at very high rpm Suitable for sticky materials All of these Suitable for highly abrasive materials Run at very high rpm Suitable for sticky materials All of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Production rate __________ with increased fineness, with a given energy input to the size reduction machine. Remains unchanged May increase or decrease; depends on the machine Increases Decreases Remains unchanged May increase or decrease; depends on the machine Increases Decreases 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)p (S/V)f (S/V)²p (S/V)p √(S/V)p (S/V)f (S/V)²p ANSWER DOWNLOAD EXAMIANS APP
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