A. Hammer crusher
B. Roller crusher
C. Impact mill
D. Fluid energy mill
A. Sand bed filter
B. Plate and frame filter press
C. Vacuum filter
D. Batch basket centrifuge
A. Reduction ratio
B. Capacity
C. Both A. & B.
D. Neither A. nor B.
A. Bulk density of materials
B. Pressure of the conveying air
C. Diameter of the conveying line
D. All A., B. and C.
A. Its openings size
B. Screening mechanism
C. Screening surface
D. Atmospheric humidity
A. Work required to form a particle of any size is proportional to the square of the surface to
volume ratio of the product
B. Work required to form a particle of a particular size is proportional to the square root of the
surface to volume ratio of the product
C. Work required in crushing is proportional to the new surface created
D. For a given machine and feed, crushing efficiency is dependent on the size of the feed &
product
A. Ratio of feed opening to discharge opening
B. Ratio of discharge opening to feed opening
C. Determining factor for minimum dia of the feed and the product
D. None of these