4.4 Recalculate the efficiency of the cyclone of Problem 4.2 for the fol- lowing particle size distribution. Size Range, um 0-2 Mass Percent in Size Range 4.0 2-6 16.0 6-12 20.0 12-20 20.0 20-40 20.0 40-80 18.0 80 2.0 assuming K = 14. 4.8 Assume that a certain type of cyclone has a particle cut diameter of 6.0 microns; (a) calculate the overall efficiency of this cyclone on the particles of Problem 4.4 and (b) calculate the overall effi- ciency of two of these cyclones placed in series. C Dechlom 12