In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing. Secondary Fine Ultrafine Primary TRUE ANSWER : ? YOUR ANSWER : ?
For classification of potable (drinking) water, we use a __________ filter. Gravity sand Rotary vacuum Vacuum leaf Plate and frame TRUE ANSWER : ? YOUR ANSWER : ?
For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the __________ filter. Rotary vacuum Sand Plate & frame Shell & leaf TRUE ANSWER : ? YOUR ANSWER : ?
Pick out the wrong statement pertaining to the roll crushers. Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced Maximum feed size determines the required roll diameter Both the rolls run necessarily at the same speed For hard material's crushing, the reduction ratio should not exceed 4 TRUE ANSWER : ? YOUR ANSWER : ?
Dry powdery solid materials are transported by a __________ conveyor. None of these Belt Bucket Screw TRUE ANSWER : ? YOUR ANSWER : ?
A widely used size reduction equipment for __________ is Bradford breaker. Talc Wheat Iron core Coal TRUE ANSWER : ? YOUR ANSWER : ?
Raw materials are charged in the iron blast furnace using Bucket elevator Screw conveyor Skip hoist None of these TRUE ANSWER : ? YOUR ANSWER : ?
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)²p √(S/V)p TRUE ANSWER : ? YOUR ANSWER : ?
Solid particles of different densities are separated by Cyclones Sorting classifier Thickness Filters TRUE ANSWER : ? YOUR ANSWER : ?
In case of a revolving mill, wet grinding compared to dry grinding Requires more energy Has less capacity None of these Complicates handling & classification of the product TRUE ANSWER : ? YOUR ANSWER : ?