Crushing efficiency of a machine ranges between __________________ percent?

Related Mcqs:

Toothed roll crushers achieve size reduction by___________________?

A. Tearing (shear) and compression B. Impact and attrition C. Both A. & B. D. Neither A. nor B....

Which of the following is not used as a surface active agent in a flocculation operation ?

A. Sodium silicate B. Quartz C. Lime D. Alumina...

Which of the following equations is Rittinger’s crushing law? (Where P = power required by the machine, m = feed rate, k = a constant, D̅ sa & D̅ sb = volume surface mean diameter of feed & product respectively) ?

A. P/m = K/ √Dp B. P/m = K . ln D̅ sa/D̅ sb C. P/m = K . (1/ D̅ sb – 1/D̅ sa) D. None of these...

In case of a hammer crusher, the final product size depends on the____________________?

A. Feed rate B. Rotor speed C. Clearance between hammer & grinding plates D. All A., B. and C....

Which of the following comes in the category of primary crusher for hard and tough stone ?

A. Jaw crusher B. Cone crusher C. Gyratory crusher D. None of these...