Mechanical Operations Work index is defined as the Energy needed to crush one ton of feed to 100 microns 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 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 Energy needed to crush one ton of feed to 100 microns 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 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 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations General mechanism of size reduction in intermediate and fine grinder is by Compression Compression and tearing Cutting action Impact and attrition Compression Compression and tearing Cutting action Impact and attrition ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Wet grinding in a revolving mill __________ as compared to dry grinding. Gives less wear on chamber walls Requires more energy Complicates handling of the product Increases capacity Gives less wear on chamber walls Requires more energy Complicates handling of the product Increases capacity ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The ratio of the actual mesh dimension of Taylor series to that of the next smaller screen is √3 2 √2 1.5 √3 2 √2 1.5 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is a coarse crusher? Toothed roll crusher Gyratory crusher Tube mill Smooth roll crusher Toothed roll crusher Gyratory crusher Tube mill Smooth roll crusher ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Feed size of ≥ 25 cms can be accepted by Ball mill Rod mill Fluid energy mill Jaw crusher Ball mill Rod mill Fluid energy mill Jaw crusher ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS