A. Early stages
B. Final stages
C. Entire process
D. None of these
A. Cutting action
B. Compression
C. Compression and tearing
D. Impact and attrition
A. Requires more energy
B. Has less capacity
C. Complicates handling & classification of the product
D. None of these
A. Smooth roll crusher
B. Toothed roll crusher
C. Gyratory crusher
D. Tube mill
A. Froude number is independent for the curves between power number and Reynolds number in
baffled system
B. Power number becomes independent of impellers Reynolds number at high Reynolds number,
but is dependent on the geometry of the impeller
C. Froude number is used to account for the effect of surface (e.g., the centre vortex) on the
power number
D. All A., B. and C.
A. Operate at higher speed
B. Employ bowl of larger diameter
C. Can’t be operated under pressure/vacuum
D. Can’t be used for separation of fine suspended solids from a liquid
A. 24
B. 74
C. 154
D. 200