The constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond’s law, Rittinger’s law and Kick’s law) depend upon the_________________?

A. Roll crusher
B. Ball mill
C. Tube mill
D. Hammer mill

A. Entails less labor cost
B. Facilitates filtration under higher pressure
C. Provides more effective washing
D. All A., B. & C.

A. Solids
B. Solids from fluids
C. Liquids
D. Solids from solids

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. gm/cm2
B. cm/gm
C. cm/gm2
D. gm/gm

A. Asbestos
B. Rubber
C. Non-metallic ores
D. Limestone