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2003 Course Polymer Processing Operations - I

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Total No. of Questions : 12] P1318 [Total No. of Pages : 3 [3664]-294 B.E. (Polymer) POLYMER PROCESSING OPERATIONS - I (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates : 1) Answers to the two sections should be written in separate books. 2) Neat diagrams must be drawn wherever necessary. 3) Figures to the right indicate full marks. 4) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) a) b) c) Q2) a) b) c) Q3) a) b) Explain gear pump or melt pump assisted extrusion process. Discuss volumetric efficiency power requirement and pulsation. [8] With neat sketch, discuss twin belt coerugator unit to make coerugated plastic sheet. [3] With schematic sketch, explain different elements in a wire or strand covering line. [5] OR Draw a neat sketch of tubing extrusion line using vacuum sizing and explain in short? [6] With a neat sketch, explain caterpillar haul off system for extruded profiles. [6] What are the different calibration systems used for pipes. Explain any one with a neat sketch. [4] Write in short about draw ratio and secondary draw. Write short notes on (any four): i) Free blowing. ii) Line binding and forming in oven. iii) Reverse draw forming with plug assist. iv) Twin sheet forming. v) Diaphragm forming. [2] [16] P.T.O.

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