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Q. What do you mean by Thermosetting plastics?
This plastic undergoes a number of chemical changes on heating and cure to infusible and practically insoluble articles. The chemical change is not reversible thermosetting plastics do not soften on reheating and can not be reworked. They rather become harder due to completion of any left-over polymerization reaction. Eventually, at high temperatures, the useful properties of the plastic get destroyed. This is called degradation. The commonest thermosetting plastics are: alkyds, epoxides, polyesters, phenolics and urea.
Draw a graph of velocity and shear stress distribution profile for viscous flow between two parallel plates.
causes and remedy of coldshut,misruns,shirnkage cavity,microporosity,metal penetration,mismatch
The following data was obtained from an orthogonal cutting test : Rake angle = 20o, Depth of cut = 6 mm Feed rate = 025 mm/rev Chip length before cutting = 29.4 mm Chip
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The corrosion resistance of the austenitic stainless steels (within the concentration and temperature conditions described above) relies on the formation and stability of a passive
What is the difference between hot and cold working
Contrary to the misconception that the growth in automobile industry has catered only to the higher income-stratum of society by producing mostly passenger cars, the fastest growt
Resistance welding electrodes and holders Requisites For Electrodes : The resistance welding electrodes are meant for the following functions: Conducting electricity
WIRE FEEDING UNIT The wire electrodes are supplied as continues coils in wire spools. The solid wires are available in the following sizes 0.8, 1.0, 1.2, 1.6, 2.0 and 2.4 mm di
Preliminary stress analysis work will start early in the detail engineering phase after completion of equipment layout and piping study drawings. The piping required to be analyzed
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