A. Run at very high rpm
B. Suitable for sticky materials
C. Suitable for highly abrasive materials
D. All A., B. and C.
A. Roller crusher
B. Ball mill
C. Jaw crusher
D. Gyratory crusher
A. Ball mill
B. Rod mill
C. Hammer crusher
D. Fluid energy mill
A. Hammer crusher
B. Ball mill
C. Roll crusher
D. Gyratory crusher
A. Is defined as the ratio of surface area of a sphere having the same volume as the particle to the
actual surface area of the particle
B. Has the dimension of length
C. Is always less than 1
D. Is the ratio of volume of a sphere having the same surface area as the particle to the actual
volume of the particle
A. 1 to 2°
B. 2 to 5°
C. 5 to 10°
D. 10 to 15°
A. Attrition
B. Impact
C. Both A. & B.
D. Neither A. nor B.