b 5. (10p) Complete the following statements (You might explain your rationale briefly if you wish): a. Particles in cohesive powders don't move individually and flow rather in chunks, because 1. The forces between the particles are larger than the weight of the particles The weight of the particles is larger than the forces between the particles. ii. None of the above becomes necessary to break up the lumps in cohesive mixtures. i. High RPM (revolutions per minute) 1. Shear Stress ii. Many blender revolutions iv. All the above c. Tapped density of a powder is always _its bulk density i. more than li. less than ii. equal to d. The greater is the cohesion of the powder, is the difference between the dilated density and the tapped density of the powder. i. the lesser li. the greater ii. None of the above e. Electrostatic charging of powders can cause_ i. Powder sticking to equipment i. Agglomeration iii. Poor flow iv. Electrostatic discharge V. All the above 6. (30 pt) a. What is fluidized-bed drying? Explain briefly with its advantages and disadvantages b. List some of the other applications of a fluidized bed apart from drying. Explain a couple of applications in detail c. Describe scale up criteria to be considered for a fluid bed granulator Z 120 pt) a. What is wet-granulation? Why is it required? Explain briefly with its advantages, disadvantages, and some commonly used granulation equipment. b. What are the typical wet-granulation mechanisms? Explain briefly the significance of each mechanism