4.16 A flour mill has been required to install particulate control equipment to remove 90% of its emissions. A testing firm has determined a size distribution of the flour as follows: A consulting firm, B. S. Schuters, Inc., has recommended a twostage cyclone (two cyclones in series) for this problem, and has come up with the following design: Wi=20inchesHi=30inchesNe=8turnsVi=70ft/secp=62.4lbm/ft3 The viscosity of the air is 1.2(10)5lbm/ft-sec. Verify or refute this recommendation