A. Apron
B. Screw
C. Helical flight
D. Both B. & C.
_____________ conveyors are also called scrapers? Read More »
Mechanical Operations A. Roll-crusher
B. Squirrel-cage disintegrator
C. Ball mill
D. Tube mill
Fibrous material is broken by a__________________? Read More »
Mechanical Operations A. 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
B. Energy needed to crush one tonne of feed to 200 microns
C. Energy (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product
passes a 200 mesh screen
D. Energy needed to crush one ton of feed to 100 microns
Work index is defined as the_________________? Read More »
Mechanical Operations A. Elasticity
B. Hardness
C. Toughness
D. Size
Grindability of a material does not depend upon its_____________________? Read More »
Mechanical Operations A. Plug
B. Turbulent
C. Laminar
D. None of these
A. Banbury
B. Pug mill
C. Tumbling
D. Pan
A _____________ mixer resembles a ball mill without balls? Read More »
Mechanical Operations A. Smooth roll crusher
B. Toothed roll crusher
C. Gyratory crusher
D. Tube mill
Which of the following is a coarse crusher ? Read More »
Mechanical Operations A. 5-10
B. 10-20
C. 20-40
D. As high as 100
The reduction ratio for fine grinders is_____________? Read More »
Mechanical Operations A. Cake becomes very dense
B. Liquor stops flowing out to the discharge
C. Filtration pressure rises suddenly
D. Both B. & C.
Filtration should be stopped in a filter press, if the_________________? Read More »
Mechanical Operations A. Conditioner
B. Frother
C. Collector
D. Activator
Xanthates are used in the froth floatation process as a/an _______________________? Read More »
Mechanical Operations