A. Square inch
B. Linear inch
C. Square foot
D. Linear foot
A. Run at very high rpm
B. Suitable for sticky materials
C. Suitable for highly abrasive materials
D. All A., B. and C.
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. Secondary
B. Fine
C. Primary
D. Ultrafine
A. Minimum at the filter medium
B. Minimum at the upstream face
C. Maximum at the filter medium
D. Same throughout the thickness of cake
A. Hammer mills
B. Rod mills
C. Gyratory crushers
D. Crushing rolls
A. Have greater capacity per unit of discharge area
B. Crush intermittently
C. Are less suitable for coarse materials
D. Have less steady power consumption