Although designs are different, operating principle behind gas cyclone separators is the same.  Describe how separation is carried out.

Given the table below and your judgement for extreme operational conditions, select polymers for the following applications respectively: a dry ice bucket (operating temperature of -78C), a teeth aligner, a hair dryer (operating temperature range of 60-80C) and a phone case. Table 15.2 Melting and Glass Transition Temperatures for Some of the More Common Polymeric Materials Material Polyethylene (low density) Polytetrafluoroethylene Polyethylene (high density) Polypropylene Nylon 6,6 Polyester (PET) Poly(vinyl chloride) Polystyrene Polycarbonate Glass Transition Temperature [°C (°F)] -110 (-165) -97 (-140) -90 (-130) -18 (0) 57 (135) 69 (155) 87 (190) 100 (212) 150 (300) a. Polypropylene, PET, PTFE, Polypropylene O b. PTFE, HDPE, HDPE, polypropylene c. LDPE, PTFE, Nylon, polypropylene O d. Nylon, PET, HDPE, PVC Oe. HDPE, LDPE, LDPE, PTFE Melting Temperature [°C (°F)] 115 (240) 327 (620) 137 (279) 175 (347) 265 (510) 265 (510) 212 (415) 240 (465) 265 (510)

List out various tests for the measurement of workability and explain any 2 in detail.

List out various types of cements. Explain about any 4 of them in detail