Hamad Mechanical Operations 30/06/2020 A. S B. 1/S C. S2 D. √S 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...
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