Hamad Mechanical Operations 18/09/2021 A. > 1 B. < 1 C. 1 D. 2 Related Mcqs: Which of the following agitators having a large blade area, rotating at slow speed is used for mixing high viscosity liquids (> 50000 centipoise) ?A. Propeller B. Helical screw C. Flat blade turbine D. Curved blade turbine... Which of the following size reduction equipments employs mainly attrition for ultrafine grinding ?A. Jet mills B. Fluid energy mill C. Micronizer D. All A., B. and C.... Rittinger’s number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger’s number of a material indicates its________________?A. Easier grindability B. Poor grindability C. High power consumption in grinding D. None of these... In classification, particles are said to be equal settling, if they have the same terminal velocities in the_______________?A. Different fluids B. Same fluid C. Same field of force D. Both B. and C.... Pine oil used in froth floatation technique acts as a/an_____________________?A. Collector B. Modifier C. Frother D. Activator...
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