Mechanical Operations For efficient grinding, ball mills must be operated At a speed more than the critical speed At a speed less than the critical speed With minimum possible small balls At a speed equal to the critical speed At a speed more than the critical speed At a speed less than the critical speed With minimum possible small balls At a speed equal to the critical speed ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In the cyclone separator used for separation of dust from dust laden gas, the gas Both B and C Is admitted tangentially at high velocity Develops a helical motion inside the chamber Enters the cyclone from the top Both B and C Is admitted tangentially at high velocity Develops a helical motion inside the chamber Enters the cyclone from the top ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Removal of activated carbon from glycerine is done by Rotary vacuum filter None of these Plate and frame filter Batch basket centrifuge Rotary vacuum filter None of these Plate and frame filter Batch basket centrifuge ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Work index is defined as the Energy (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product passes a 200 mesh screen Gross energy (kWh/ton of feed) needed to reduce very large feed to such a size that 80% of the product passes through a 100 micron screen Energy needed to crush one ton of feed to 100 microns Energy needed to crush one tonne of feed to 200 microns Energy (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product passes a 200 mesh screen Gross energy (kWh/ton of feed) needed to reduce very large feed to such a size that 80% of the product passes through a 100 micron screen Energy needed to crush one ton of feed to 100 microns Energy needed to crush one tonne of feed to 200 microns ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A tube mill as compared to a ball mill Has larger length/diameter ratio (>2 as compared to 1 for ball mill) All of these Employs smaller balls Gives finer size reduction but consumes more power Has larger length/diameter ratio (>2 as compared to 1 for ball mill) All of these Employs smaller balls Gives finer size reduction but consumes more power ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Separation of isotopes is generally done using a/an __________ centrifuge. Disk-bowl Neither A nor B Both A & B Ultra Disk-bowl Neither A nor B Both A & B Ultra ANSWER DOWNLOAD EXAMIANS APP
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